MikroTik

ldvaden

HI there, I just my sxt setup, but I can´t get more than 36MB bandwidth test. What happended to the 200mb transfer rate ????? Is there any special of setting up the SXT routerboard as far as configurations ? Thanks. BTW. The ptp it is only 1km. The HT-Extension-Channel defaults to OFF. That may be ...

ldvaden

!!!OK!!! For some reason, HT-Extension-Channel is disabled by default. Now running 270 Mbps/243 Mbps. ===== THANKS in advance for posting a RouterOS configuration which achieves the speeds mentioned by http://www.mikrotik.com/download/share/newsletter30.pdf and http://www.routerboard.com/index.php?s...

ldvaden

What I did was put the desired subnet addresses on eth1 at each end of the link (for management purposes) and 172.31.0.1/30 on the wlan1 on the near end of the link and 172.31.0.2/30 on the wlan1 of the far end of the link. Otherwise, the wiki page at <http://wiki.mikrotik.com/wiki/Transparently_Bri...

ldvaden

Having just received our first shipment of SXTs, I wanted to ask fellow MikroTik community members about their views of best current practices with regards to ptp links. For example, beyond what Uldis has written about the SXT and ptp links, are you using bridging or routing? If bridging, are you us...

ldvaden

There is the XR9, SR9 and FLR9G30, all 900MHz. FLR9G30 seems to be the better of the three according to most folks. I've got a few and haven't done thorough testing yet. 0ldman, How did the FLR9G30 turn out? Have you evaluated the PR9? GNca George over on dslr would like your input on the XR9 and S...

ldvaden

No. We're a 95% MT shop. Currently trying some UBNT clients. I have laptops, phones, etc, tested on the network. My problem is that I am addicted to RouterOS but have 45% Tranzeo CPE-200s from the good old days when radios were built to last instead of to be disposed of, 10% Zinwell/Deliberants acq...

ldvaden

Looks interesting. I've run some N stuff, mostly just testing and have had no issues aside from my Thinkpad T40 (Intel 2100 802.11b) will not associate. Everything else will. This laptop will not connect to my other AP's either. Have you tested a Tranzeo CPE-200 (mac address 00:02:6f)? How about th...

ldvaden

Looks interesting.

I've run some N stuff, mostly just testing and have had no issues aside from my Thinkpad T40 (Intel 2100 802.11b) will not associate. Everything else will.

This laptop will not connect to my other AP's either.

0ldman,

Did you get a hall permit to leave the other place?

ldvaden

We're thinking about using the UBTik + Ubiquiti dual-pol sectors
(see http://www.balticnetworks.com/maxxwave- ... stems.html).

Again, THANKS for your input.

kind regards/ldv

So, there is only one (1) UBTik evangelist in this world?

ldvaden

THANKS for your input; lightning totally wiped out a main tower and we're going to rebuild it starting Monday, but was wondering if we're going to leave some subscribers with legacy radios without service. For example, the Tranzeo CPE-200 (mac 00:02:6f, the Senao/Engenius/Prism)? For example, the Ub...

ldvaden

using the Winbox GUI or from the CLI.

The CLI accepts the input, but does not do the actual move.

What causes this?

Kind regards/ldv

ldvaden

Have you had success with a MikroTik acting as the IPSEC/L2TP server for connections from Verizon DSL subscribers (using ActionTec)?

Which VPN client software did you have success with?

kind regards/ldv

ldvaden

So, are you proposing to drop tcp and udp directed to port 53 of the router's IP address or are you proposing to change the NAT rules to operate only on ether2 and ether3? The former and the latter. Only redirect DNS queries from your clients, and only do so if you wish to force them to use your re...

ldvaden

According to those NAT rules you posted you're redirecting all DNS traffic to yourself. dst-nat happens in pre-routing. Once the destination IP has been rewritten to be the router's IP address, the packet will be in the input chain and not in the forward chain. THANKS for your reply. So, are you pr...

ldvaden

Make firewall filter chains that drop DNS in the input chain when requests are sourced from networks you don't want to use your caching resolver. I agree that your suggestion is prolly necessary, but may not be sufficient. Our tests indicate that you can do a 'host http://www.mikrotik.com a.b.c.d' ...

ldvaden

We use code below the sig with the intent of providing a caching name server for clients, thus saving wireless backbone bandwidth for other uses. The problem is that all IPs are then listed on, e.g., team-cymru.org's open resolver list. If we set "allow-remote-requests=no", the router stop...

ldvaden

We see this sort of thing associated with a particular subscriber too often and need to know how to control the situation. Is this inherent in the 802.11b/g protocol or is there a proactive solution? An access list entry which denies access to the AP for the subscriber is the current solution. Route...

ldvaden

http://forum.mikrotik.com/viewtopic.php?f=13&t=38690&p=191648&hilit=3.31#p191648 Sorry, but we depend on the official page at <http://www.mikrotik.com/download.html> for release notes. As MikroTik has said several times, this forum is not an official production of MikroTik. As of this d...

ldvaden

This showed up at the top of a tower today as the result of equipment replacement.

Does anyone have release notes?

Kind regards/ldv

ldvaden

We are following sergejs' advice to downgrade an RB133 from 3.30 to 2.9.51 to see if it will solve a problem with an AP which has the only Prism card in our network. We encounter system,error broken package routeros-rb500-2.9.51.npk We would surely appreciate any advice on how to accomplish the down...

ldvaden

From a MikroTik AP running RouterOS 4.5 with an XR2, feb/22 21:28:43 wireless,debug wlan1: denying assoc to 00:15:6D:DC:C9:13, does not support all basic rates I checked that particular Ubiquiti CPE and it seems to be configured correctly. G mode only is set on the AP and there are no associations. ...

ldvaden

just make sure that after tgrands reset, you re-apply the HWRETRIES setting, ie. increase the number to 7-10

Thanks, Normis. That may be some of the best advice I've ever read in this forum. Time will tell.

ldvaden

So what do you plan to do? This may work to drop packets on the CPE, but if you don't control the CPEs then this would be almost useless on the AP. From our observations (which may or may not be totally correct), the real limiting factor of an AP offering 802.11b/g is not bandwidth, but rather PPS ...

ldvaden

That page has nothing at all about PPS.
Maybe you have the wrong link?

See dst-limit and limit.

kind regards/ldv

ldvaden

The answer (thanks to Ian at Titan Wireless) is at <http://wiki.mikrotik.com/wiki/Firewall/ ... c_examples>.

kind regards/ldv

ldvaden

Any leads on how to control packets per second in the 802.11b/g environment would be very much appreciated. An alternative would be to be able to control Last_Activity (wireless tables/registration). In other words, how to keep a customer from saturating the inbound link to an 802.11b/g AP ... Kind ...

ldvaden

make sure your bootloader was upgraded before upgrading RouterOS. ie. type "/system routerboard upgrade" while still using v3.28 If the key gets lost, you can alsways re-paste it into the router, as the keys are available in your account. the RB can lose the key if you have some old bootl...

ldvaden

Nota Bene: This has not been verified (read: reproduced).

An upgrade from 3.28 to 3.30 on RB-411A lost the license key on a production link.

Again, this has not been verified (read: a second example is not available).

Kind regards/ldv

Larry Vaden
Internet Texoma, Inc.

ldvaden

tomorrow hopefully

Any update on 3.26 availability?

kind regards/ldv

ldvaden

how to downgrade to 3.24 without losing configuration? anyone help please my box running like abnormal :( iwant to downgrade to 3.24 Just make a backup, then do an export to file Then upload 3.24 and do a downgrade. [vaden@EP-AP1] > /system backup Console has crashed; please log in again. Same resu...

ldvaden

What is the consensus of the community with regard to the best version of RouterOS when OSPF is necessary? Which V? routing or routing-test? Would your answer be different for RB433AH and RB532? Thanks in advance for your replies. Kind regards/ldv p.s.: I'm glad to see MUM returning to Dallas/Ft Wor...

ldvaden

sounds like routing issue. try to add static routes between RB493 and RB411 - maybe OSPF fails sometimes for some reason. also, see what happens with routing table during these problems p.s. what is 'pop'? =) Thanks for your reply. pop === point of presence N.B.: v3.24 was downgraded to previous st...

ldvaden

what to you mean 'drops some connections'? Here's how a good friend who is downstream of the RB493AH puts it (he's the source of the data of the weather at <http://thunder.wxpro.net:8015/rst/rad/loop/fws/n0rfws.gif>) (note there should be data each minute): Larry, it's doing it. The wget is trigger...

ldvaden

what to you mean 'drops some connections'? Thanks for your reply. The RB493AH serves as a router for the pop, with both upstream and downstream backbone connections and runs OSPF. The main (but not only) problem we are having is on port 8 of the RB493, which is connected to a RB411 which is a wirel...

ldvaden

A thunderstorm hit a wireless pop and we had to replace RB532 running 2.9.51 with RB493/AH running 3.24. RB493/AH drops some connections; can't determine why. Your help appreciated --- please reply to vaden@texoma.net (better yet, call 903.821.7600) if you are ready, willing and able to help. kind r...

ldvaden

Can one temporarily mix and match 3.14's OSPF and 2.9.51's OSPF or must the upgrade be done all at once?

Kind regards/ldv

ldvaden

When connecting, Winbox errors with:

Could not fetch index from a.b.c.d (port 80): Moved Permanently

What does this mean and what is the resolution?

Kind regards/ldv

ldvaden

Given a ptp link running 2.9 on both ends, one end of which was hit by lightning, can that end be replaced with 333 running 3.x or are the two versions of the OS not compatible?

Kind regards/ldv

ldvaden

A Google is unproductive; does anyone know anything about this log message?

thanks/ldv

ldvaden

How did they do what? My edit appears to have hit /dev/null :( The original post should have mentioned that the following references to 192.168 appeared unexpectedly in a MikroTik AP (2.9.46) mid afternoon: [operator@dd-ap4] > /ip route print 1 AD 0.0.0.0/0 r 192.168.1.1 0 bridge1 [operator@dd-ap4]...

ldvaden

Please critique this code, invoked from the input and forward chains in an AP: add chain=log-and-drop-rogue-dhcp action=log in-interface=wlan1 src-port=67 \ dst-port=68 protocol=udp log-prefix="DROP_ROGUE_DHCP" comment="Log and \ drop rogue DHCPOFFERS" disabled=no add chain=log-a...

ldvaden

How did they do what? My edit appears to have hit /dev/null :( The original post should have mentioned that the following references to 192.168 appeared unexpectedly in a MikroTik AP (2.9.46) mid afternoon: [operator@dd-ap4] > /ip route print 1 AD 0.0.0.0/0 r 192.168.1.1 0 bridge1 [operator@dd-ap4]...

ldvaden

This has happened twice in the last week, so obviously we're open to someone messing with our APs.

How did they do this (presume it wasn't via WinBox or ssh, but rather from the wlan)?

How do we prevent it?

THANKS for your help - it is truly appreciated.

Happy New Year!

Kind regards/ldv

ldvaden

Perhaps a good place to start finding out about ARP attacks is here: http://en.wikipedia.org/wiki/ARP_spoofing Thanks for the URL. By the way, did we ever decide that you had an ARP DOS Attack problem? HAve you made any headway in reducing your latency on the copper links? So far, . fixed the leak ...

ldvaden

but you leave yourself open to ARP attacks, which often manifest them selves as DOS attacks, overloading the processor of the switch and brining it to its knees. A symptom could be the slow network with high latency that you describe. So, what is your network config? Sorry for the delayed response,...

ldvaden

The MT have no ethernet statistics. It's high on my wishlist too. You'll have to use a managed switch.

The switch connected to Ether3 is managed, but we're trying to get double confirmation of the problem.

rgds/ldv

ldvaden

OK, well lets really get in to this and see if we can help you. 5: ... running multiple IP subnets on one lan segment can cause headaches..... Does this help? This is the only point of the 5 that we hit on. This is at a distribution pop on a wireless ring. Ether1 is left side of ring (single subnet...

ldvaden

Try this: /interface monitor-traffic "name" where "name" is the name if the interface such as ether1 is that what you wanted? Thanks for the reply. My question wasn't complete or correct -- for which I apologize. I'm looking for Ethernet errors which are leading to the copper li...

ldvaden

Is there a CLI command which will result in Ethernet statistics?

Happy New Year!

rgds/ldv

ldvaden

The Orthogon Systems (Gemini) link heads west from headquarters; the MikroTik link heads east from headquarters. Test conducted beginning at Mon Dec 17 16:09:22 CST 2007. --- Motorola Canopy PTP 400 (formerly known as OS-Gemini) ping statistics --- 1000 packets transmitted, 1000 received, 0% packet ...

ldvaden

Hi, Given the DHCP server is on the Mikrotik AP's wireless interface, I don't think its necessary to use DHCP relay on eth1 if wlan1 (in station-pseudo-bridge) and eth1 is in a bridge, meaning the windows machine will get the IP from the MT AP. Thanks for your reply. We use a central DHCP server, w...

ldvaden

Thanks in advance for your reply(ies). The objective is to replace traditional CPEs with MT CPEs. Given a RB133C running 3.0rc9 in station pseudobridge mode registered with a MT AP (running 2.9.46), is it necessary/desirable/unnecessary/undesirable to run DHCP Relay on eth1? I ask because I'm having...

ldvaden

In 2.9.43 ospf routing-test, we're seeing messages which aren't found on Google or on this board (please pardon me if I'm wrong) referencing non-existent interfaces such as eth0, eth1 when the actual interfaces are ether1-ether3. The strings eth0 and eth1 aren't found in an export either. Can anyone...

ldvaden

The recent floods and electrical storms have led us to accelerate the reorganization of our network (read: deployment of MT RouterOS devices vs. Cisco) and I'm encountering some ospf errors I haven't found via Google or via search of this forum (please excuse me if I'm wrong) at a time that is very ...

ldvaden

Don't run an inverter. Run everything off DC power. Have lightning arrestors at the bottom of each cable and ground them well. I've got two solar powered sites, and it's all about efficiency and low power draw. It's able to be calculated and be very reliable and long lasting. I just wish solar pane...

ldvaden

Restatement: RB112 was upgraded to 3.0beta7. After upgrade, RB112 can't be seen by winbox. How does one recover? Use Netinstall Netinstall isn't an option in our environment because: 1) we quit WinDoze 01/01/2006 2) Netinstall won't run under Wine AFAIK (_we_ discussed this matter in a support tick...

ldvaden

what exactly is your question, how to upgrade to v3b7 or what does the jumper do? The question is in the subject line, but I'll restate the obvious, as the implication of the ChangeLog was that the "soft reset" button might not work as expected. Reasonable expectations are that a RouterOS...

ldvaden

I can't seem to get an RB112 loaded with 3.0beta7 (via ftp and reboot) in the lab to work again :( Prior load was 2.9.42, but I never had to try the "soft reset" jumper. rgds/ldv What's new in 2.9.42: *) fixed RouterOS configuration to reset when "Soft Reset" jumper on RB133C or ...

ldvaden

do you have nstreme enabled on that link?

AFAIK, behavior is the same whether Nstreme is on or off.

best regards/ldv

Redundant unanswered question: is "Notify me when a reply is posted" working for others?

ldvaden

The "Advanced Status" tab on 3.0beta7 does not contain all the information presented by 2.9. Specifically, it is missing the Noise Floor field and the table of Tx Powers (Tx Data Rate vs. Tx Power). What's the reason this (the Advanced Status tab) is not available on the master unit, but i...

ldvaden

do you have nstreme enabled on that link?

nstreme=enabled, polling=enabled, csma=disabled

rgds/ldv

ldvaden

I don't believe it has anything to do with the number of clients on the AP. Nor do I; I watched the same thing happen at a new pop with 8 initial subscribers we had acquired (read: no control over CPE choices); while manually searching for the best channel to use on 2.9.42, the average time to firs...

ldvaden

theses are at fema trailer parks..no transf. but high voltage feeds to transformers or some kind of distribution point, 30ft below on ground. this feed is like the a big version of what you normally see on the side of a house where the power feed comes in. Assuming quite a few FEMA trailers, FEMA (...

ldvaden

I tried enabling OSPF on RouterBOARD 532A with 333MHz CPU and its utilization was about 10% higher in comparison with static routing. RouterOS 2.9.x does not do that. Is it feature/bug of new implementation of OSPF in v3? Has anyone got the same experience? I examined my own 5.8 GHz link to HQ, whi...

ldvaden

Fresh from an install of 3.0beta7 on two MT RB133 boards (OK, I dont' remember, but they are 175 MHz processors) on my personal PtP link to HQ, CCQs of > 300% with overall CCQs > 200% are observed. ?1: Has the reported range/scale changed vs. 2.9 series? Sorry if I'm the last one to ask/know, but I ...

ldvaden

Why aren't the _1st_ set counters associated with the 1st three mangle rules not always in unison (read the same)? Counters for 2nd and subsequent sets of mangle rules are typicall in unison. Coding error on our part? Not to worry? Any help appreciated. rgds/ldv <code> add chain=prerouting action=ma...

ldvaden

I'll take that as a compliment, I'm familiar with lots of wireless options.

Hi 0ldman,

What has been your experience with nearby power lines?

kind regards/ldv
born in 1946, some say 40 years too soon

ldvaden

Power lines should not adversly affect wireless. You may find that in some cases the power cables can act as an amplifier. In these strange cases you will find that the aim of the client antenna is best several degrees out from straight line to the tower (AP). Edit: Also consider this: Octaves of 6...

ldvaden

we've got a VIC (very important customer) within 100 m and roughly perpendicular of overhead high voltage distribution lines leading to the substation about 1 km away. Our shot is roughly perpendicular to the overhead lines and roughly 4 km. AP is RB532A+SR2+MaxRad Omni. CPE is subject to NDA, but c...

ldvaden

I bought two new Intel Pro 1000 Gigabit nics for my 2.9.42 Mikrotik router. Currently I have Ether 1 and Ether 2, both Intel Pro 100 (onboard and PCI). Plan is to power down, disable onboard, replace PCI with Gigabit card and insert another Gigabit card next to it in another PCI slot. Question is h...

ldvaden

new-tos (max-reliability | max-throughput | min-cost | min-delay | normal integer) - specify TOS value to be used in conjunction with action=change-tos max-reliability - maximize reliability (ToS=4) max-throughput - maximize throughput (ToS=8) min-cost - minimize monetary cost (ToS=2) min-delay - m...

ldvaden

every week someone is discussing how to drop p2p traffic, or limit it somehow. :twisted: every week new topic. good luck :wink: EDIT: for those who do not know where is search button: http://forum.mikrotik.com//viewtopic.php?p=55425#55425 Does a new week begin on Sunday or Monday? :) Nomination for...

ldvaden

sorry that I never updated my findings on this post but I will now. Any suggestions on what to do.

What are the components of the AP?

What do the logs say (you might want to turn on wireless debug)?

rgds/ldv

ldvaden

If you mangle packets to change their TOS, or a SIP phone sets its TOS/DSCP value to a higher priority does Mikrotik do any prioritization automatically? Basically is setting TOS enough or does one need to also setup a queue ? I also see 802.1p priorities on SIP packets, but I'm not sure if a queue...

ldvaden

what if i want o use it in a WDS nodes as the link interface 5.8G and 15dbi omni antenna , distance about 3-4Km ?? with its 65mW would the link be reliable ?? and if used for clients connection at the wds node (rb532) 2.4G with a 15dbi omni antenna , how long the relible distance will be ??? its 65...

ldvaden

Will RouterOS level 3 allow this? or do I need to get level 4 for this? This is just my initial test shot, need something working to show the investors.

You can do this with a 24 hour free license if you can get your investors to show up within 24 hours.

rgds/ldv

ldvaden

Bittorrent is a major factor on our wireless netork and we'd like to make sure interactive subscribers are treated well and that non-interactive subscribers still get best effort service. What I don't get (read: I've only had one cup of coffee so far this morning) is why if you can drop or mangle it...

ldvaden

We're fairly new to RouterOS (say < 2 years) and I wonder if RouterOS is flexible enough to allow the coding of a special purpose DHCP routine to run in the AP or upstream in another RouterOS box that would adopt the IP schema used by CUWiN <http://www.cuwin.net/manual/techdocs/ipschema>? Or would w...

ldvaden

http://wiki.mikrotik.com/wiki/Wireless_Debug_Logs

It's a work in progress, so suggestions and corrections are welcome.

Congratulations! This information is very helpful.

kind regards/ldv

ldvaden

3) I have reduced the upload from the clients to internet. (for 50 customers from 2 Mbit to 600 kbits) with this modification the download increase to 8 Mbit for sector. Hi maxfava, is that 600 Kbps cumulative across all 50 customers or per customer (counting on a statistical distribution)? Care to...

ldvaden

These are Tranzeo clients radios. In desperation I switched back to the Tranzeo AP and all if fine. It appears to me we still have an issue with compatability with some radio chipsets. Any thoughts? I'm not very confident this will be helpful to you, but some folks running Tranzeos wind up trying t...

ldvaden

Message from syslogd@mosel at Thu Oct 19 09:22:27 2006 ...
mosel �t

What is RouterOS trying to say?

Bump.

regards/ldv

ldvaden

In my case a warrenty return would mean shipping back to usa from australia, not to mention pulling it down etc. I have had 100% sucess with it. Its only the cm9, sr2, r52,s that blow (or used to) Are you saying you have never used the Atheros-based Senao or that it doesn't blow when faced with ESD...

ldvaden

What is the configuration now then? The same I'd like to suggest that you: . export your configuration . redact any proprietary information . post it on this forum . expect multiple experienced members of the MikroTik community, MikroTik itself and its dealers, to react with informed suggestions. r...

ldvaden

Really simplified, you run a piece of grounded copper wire all the way to just above the top of the antenna. It prevents static buildup on the antenna itself. It would be nice if there was a list of antennas this is not required for, though it is likely I'll do it with whatever antenna I use. That ...

ldvaden

dear all , i have a mikrotik router setup as WDS AP how can i make this wireless Undiscoverable from the site survey An alternative (presuming understanding your intention) is to limit which devices can associate with the AP. regards/ldv sir , i need my ap to be hidden from site surveing how can th...

ldvaden

If I want solving my problem with latency, I must reset my routerroart to default and reconfigure it?

The founder of MikroTik (John Tully) suggested that in your case; sometimes, it is the only (read: faster) way to find a typo or mischeck.

regards/ldv

ldvaden

SR2 is only b/g.

I would prefer SR2 between those 2, but I would prefer another card if i had choice.

Rumor has it that there will be another choice by the end of 1Q2007.

Is your preference based on features or price or both?

regards/ldv

ldvaden

Off Topic (Sorry)

Its been months now since I blew a card after the wire trick...

Never blew one since

What's the wire trick? Which manufacturer (in your experience) requires this ECO (engineering change order)?

regards/ldv

ldvaden

Hello, wich the best Minipci card that provides 400mw for the routerboard 532 what's the point using such large tx-power? all atheros cards show great performance on routerboard When I lived in Germany, there were 60,000,000 folks who lived there in a country 1/3 the size of Texas. In Texas, the po...

ldvaden

If you're having throughput problems, try turning off nstream - the RB112 doesn't have a whole lot of CPU and you might be able to get more raw data through the link by turning it off. There are at least two schools of thought - one says dilution is the solution to pollution, one says concentration...

ldvaden

dear all ,
i have a mikrotik router setup as WDS AP how can i make this wireless Undiscoverable from the site survey

An alternative (presuming understanding your intention) is to limit which devices can associate with the AP.

regards/ldv

ldvaden

We used to use 15db omnis, and now use 16db sector panels, and find that the sectors have way better coverage area over the omni.

Please tell us which manufacturer makes an Honest To God 16 dBi gain sector panel antenna?

regards/ldv

ldvaden

As usual, your rate settings are all messed up. A /system reset is probably easiest. System reboot helps no more than 5 minutes... Reboot is not solving ! I'll bet you $100 that John meant for you to key in /system reset at the CLI prompt. John's from Memphis IIRC and may therefore like his BBQ sau...

ldvaden

the severance betwen Tx/Rx Frames vx. TX/Rx HW Frames are monimal. RX frames are equal. TX is little different ...Very little Were the ping times good or poor when you took that lab note? Whether good or bad, did you make a second lab note regarding the opposite condition? If so, what was that resu...

ldvaden

the severance betwen Tx/Rx Frames vx. TX/Rx HW Frames are monimal. RX frames are equal. TX is little different ...Very little Were the ping times good or poor when you took that lab note? Whether good or bad, did you make a second lab note regarding the opposite condition? If so, what was that resu...

ldvaden

MK112 with prism 2,5 card. 12 connectred clients. And latency si around 2-6 ms. It is very cool but not for long time. A rest of time the latency is around 150 - 400 ms. If you cycle between times of good latency and poor latency, look for the cause of the cycle. A single cycle (a single occurrence...

ldvaden

AP: And the are a lot of droped packets!I tryed to change the frequency too. It is the same. You can get some helpful information by doubleclcking on an entry in the wireless/registration table and looking at the Statistics tab regarding what is happening below layer 3. Pay close attention to Tx/Rx...

ldvaden

Any help is appreciative. I hope the following boiler plate from MikroTik is as helpful to you as it has been to us. The first thing I'd do is stuff the router with v 2.9.39 (as of this writing) since: . you aren't eligible for support unless you are running current edition . it is safe to run . yo...

ldvaden

[quote="crt"] /ip firewall filter add chain=forward dst-address-list=p2p_blacklist action=drop Would a pseudo code rule like IFF traffic is coming from blacklisted IP address or going to blacklisted IP address, drop the traffic be helpful? If so, that prolly requires two RouterOS firewall ...

ldvaden

Hi all, I've a network with 400 customers and I want to reconfigurate it. Now I want to do my network more security (for me, not for the customers). I want to prevent that not authorized people connecting in my network or that my customers change the IPs. PS: I want to use radius to concentrate the...

ldvaden

learned the hard way: close study of the actual pattern may lead you to the conclusion that certain antenna manufacturers overrate their product's gain.

best regards/ldv

ldvaden

Run a ping test to the CPE, if you see high latency or sporadic latency that is usually a good indication of interference. Having just fought a sizable layer 3 problem for 2 days that existed in an environment in which there were no layer 2 issues, as an alternative, I would suggest starting with t...

ldvaden

version 3.1.6 yada yada

should have read

version 3.3.0.

My apologies for the misinformation.

best regards/ldv

ldvaden

The following was received after the manager on duty noted a problem with multiple customers regarding certain "redacted" radios upgraded to "redacted's'" latest firmware, version 3.1.6 or thereabouts :) soon to be 3.1.9. I hope this information is helpful to the MikroTik communi...

ldvaden

Why Mikrotik can't work as bridge when one card is in station and other in ap-bridge mode?? It's NOT 802.11 limitation. It's Mikrotik Limitation. You should work on it to make it working. And don't delete this post like other about this annoying inconvenience! Hello rzirzi. Please diagram what you ...

ldvaden

Firewall documentation and wiki examples provides with different configuration examples. Firewall rules configuration is not too complicated, you just need to know required services characteristics (used protocol, port, etc.). According to <http://service1.symantec.com/SUPPORT/ent-security.nsf/pfdo...

ldvaden

Can anyone tell me pro's cons of each setting, manuel does not really say Thanks One could argue the larger the frame size, the more difficult it would be to achieve correct communication. One could argue that fragmenting packets across two frames could also lead to problems. However, depending on ...

ldvaden

If you use an omni with r52, cm9 or sr2 make sure you earth really well, you will blow cards flat out if you don't

DOUBLE DITTO.

regards/ldv

ldvaden

Is this enough information?

Other forum members might have different likes/requirements, but I would like to see the output of

/ip address export

and

/routing ospf export

on the MikroTik

and

on the Cisco

show run | beg interface GigabitEthernet0/0

show run | beg router ospf

regards/ldv

ldvaden

Bump, please.

Message from syslogd@mosel at Thu Oct 19 09:22:27 2006 ...
mosel �t

What is RouterOS trying to say?

rgds/ldv

ldvaden

I agree with you on you just need to know required services characteristics (used protocol, port, etc.) . At the same time, I agree with Normis when he says most problems arise from configuration errors or less than optimal configurations. My original question goes to how complete the services chai...

ldvaden

[quote="ldvaden"]The error message below is from the log file of a Router OS 2.9.38 router with a DCHP relay configured to identify the dhcp server.

What am I missing?


Well, a lot indeed, but in this particular case, the mac address called out in the dhcp-alert code.

best regards/ldv

ldvaden

Does anyone know what the cockpit error is; the IP address at which ROS says it found a rogue server is the IP address in the dhcp-relay statement. best regards/ldv The error message below is from the log file of a Router OS 2.9.38 router with a DCHP relay configured to identify the dhcp server. Wha...

ldvaden

With MT I have very stable pings at distance of 20km, cca 1ms always.

What is your configuration?

best regards/ldv

ldvaden

open dude - Files -> packages tab then add package file you wish to upgrade then click on router in our network map and upgrade, and there is option to upgrade router. you can create router groups and then upgrade whole group. Janis, will this technique work to upgrade a 2.9.38 unit to 3.0beta4? be...

ldvaden

wirdo , We will appreciate, if you will provide us with feedback about the problems with 3.0beta. ajmal , check the connection between the router and your PC, if router is located near to you, use netinstall or CD install to upgrade to 3.0 I encountered the same problems with when using ftp to upgr...

ldvaden

Firewall documentation and wiki examples provides with different configuration examples. Firewall rules configuration is not too complicated, you just need to know required services characteristics (used protocol, port, etc.). Hi Sergejs and thanks for your post. I agree with you on you just need t...

ldvaden

Every object on earth does have some degree of microwave absorbtion and even a metallic object is not a perfect reflector. My comments are based solely on the observations of all the small experiments I have conducted. I welcome any feedback/critisism that can help explain these issues. I had the g...

ldvaden

Otherwise Stephen.Patrick should be along in a minute. <g>
George

You can look while waiting on Stephen:

<http://www.cablefree.co.uk/>

MT Router-OS based.

best regards/ldv

ldvaden

The error message below is from the log file of a Router OS 2.9.38 router with a DCHP relay configured to identify the dhcp server. What am I missing? best regards/ldv [vaden@Test-Lab] > ip dhcp-relay export # dec/27/2006 07:34:54 by RouterOS 2.9.38 # software id = 64B7-3TT # / ip dhcp-relay add nam...

ldvaden

Please trust me (and not only me) that microwave energy cannot last reflecting again and again for more than a few miroseconds in some real situation in a house. Realize that majority of common materials absobs microwave energy, so even if you would have perfecty reflecting walls, it is still not e...

ldvaden

Thanks for your post. I assume your 'ombudsman' is a PC running ROS, connected via ether to each RB532, right? We favor the RB532 as an ombudsman where it is enough. Two of the ombudsman's primary taks are keeping bogons, etc. from reaching the backbone and enforcing SLAs (our most popular package ...

ldvaden

I have 3 RB532 with SR5 radios on 120º panels as base, and 30 RB112 with SR5 or CM9 radios as clients. I want to configure them the best way to get as much bandwidth as I can, with no drops (dynamic WDS tends to produce drops in bandwidth when a client connects/disconnects) <snip> ... </snip> Which...

ldvaden

A friend just posted the following on an unrelated list: > - share techniques > - share data where possible > - allow the minimum, deny everything else Is anyone else interested in a joint effort to write MT RouterOS firewall filters for the forward chain in a WISP environment which accomplishes the...

ldvaden

According to an email just received from my favorite PhD on Internet2:

And just to head off the question that I know folks will ask, the top P2P
stuff looks like:

Shoutcast 0.73% 12.7T
BitTorrent 0.41% 7.0T
Audiogalaxy 0.25% 4.3T

kind regards/ldv

ldvaden

I like the mmcx much better. Just more rugged feeling. On a card like the cm9 which only has u.fl, I snap on the pigtail then glue it so it doesn't hit anything or come loose.

JP,

Are you still following this practice and do you still consider it helpful?

thanks/regards/ldv

ldvaden

It's AND; for a packet to match, all enabled matchers must match. If you want OR, you will need to use two rules. --Eric Hmm ... Over the last 24 hours, that rule has fired 324 times on an AP ... is the interpretation of that "the source address is in the list" AND "the destination a...

ldvaden

In other words, must you do the test in 2 statements, one specifying add chain=forward src-address-list=illegal-addr and one specifying dst-address-list=illegal-addr or can you combine as in the construct below (the syntax answer is YES)? If you can combine as in the construct below, is the implicit...

ldvaden

In Winbox you have to go to the Status tab, or you can see it by PRINT STATS on the /interface wireless on the console.

THANKS!/ldv

ldvaden

The AP freq is in use.

They will connect as the station will search for all this freq and find the AP.

Thanks - that's also the way we thought it worked as well, with the exception that the station _seems_ to never shows the frequency at which it found the AP.

Why is that?

thanks/regards/ldv

ldvaden

I think, AP frequency is used. Station uses AP frequency channel (AP<>station-wds), wds-slave adapts to AP frequency channel (AP<>wds-slave), frequency should be the same on both ends (AP<>AP). If I'm not making a mistake/cockpit error, that's why I asked - the frequencies displayed on both ends ar...

ldvaden

Hello,

In a WDS AP/Station pair (two MikroTik's with WDS link), which frequency is in use, the one displayed by the master unit or the one displayed by the slave unit or are both frequencies in use, respectively?

rgds/ldv

ldvaden

Hello,

Message from syslogd@mosel at Thu Oct 19 09:22:27 2006 ...
mosel �t

Visually, the messages appears as:

mosel ,t

received on ssh sessions into the remote log host?

What is RouterOS trying to say?

rgds/ldv

ldvaden

Either I am missing the point of the first question, or this one. As for support, that is limited to a certain period anyway, as stated here: http://www.mikrotik.com/software.php . To be more specfic, if the ladder of your original install dates were more or less in 30 day steps, it seems you could...

ldvaden

As a point of clarification, if a machine (say a RIC/522) displays upgradeable to v3.x when you WinBox/System/License does that hold or do the changes in the terms and conditions prevail? Well, you can upgrade it to the 3.x when it comes out, but if it is a Level 4 license, you will lose the dynami...

ldvaden

I think it is still affordable. $95 is VERY cheap for what you get with MT. Agreed (still cheaper than M$ or Ci$co, but then you don't get as many exploitable features either :). As a point of clarification, if a machine (say a RIC/522) displays upgradeable to v3.x when you WinBox/System/License do...

ldvaden

OpenSSH_4.2p1 Debian-7ubuntu3

Thanks for that report.

Does anyone know how to set the cockpit controls to cause openssh.i386 4.3p2 (FC5) to generate a key MikroTik will import?

thnx/rgds/ldv

ldvaden

But it's not really about the 20 ports I am using. What I am looking for is a blade MB/Chassis with dual power, at least 2-3 mb slots and a full 4 pci riser for nics.

This question is for real: what do you gain over several 1U commodity boxen (other than 4 full pci slots in a riser)?

thnx/ldv

ldvaden

Works on debian/unstable and ubuntu dapper.

What versions of openssh are on those systems?

thnx/rgds/ldv

ldvaden

weird ... i just ran thru it again and here is the output of the working one (2.9.30): <snip>..</snip> This worked fine. Does your pub key look similiar format? If so, take a supout and send the pub key in a support ticket. Sam <ACHTUNG---DISCLAIMER---YMMV> If I believed in the support fairy, I pro...

ldvaden

please post any updates on what you choose to do. Two steps were taken early today: 1. Upgrade from IOS 12.0(31)S to IOS 12.0(32)S4. ACHTUNG! the upgrade replaced configured parameters on interface cards with its own choices (things like duplex and clock source). IIRC, that's the first time we've s...

ldvaden

ok thanks, i´ll try this parameter-changes! regarding my "btw" can you give me here some informations? thanks! chris Hi Chris, With regard ot the parameter changes, perhaps MikroTik's silence is to be considered as "silence is consent" but then you wonder why they haven't change...

ldvaden

do you get an error when trying to import, or is it just not showing in the import list ?

Sam

Sam,

"Couldn't perform action -- import failed (only DSA public keys supported)(6)"

rgds/ldv

ldvaden

What filenames do you end up with on your generated keys? a .dsa and a .pub ? Which are you importing to MT ? ftp> put id_dsa_mikrotik.pub Below the sig is the transcript. This is FC5. Embarrass me! rgds/ldv [vaden@skopje .ssh2]$ ssh-keygen -t dsa -b 1024 Generating 1024-bit dsa key pair 27 o.oOo.....

ldvaden

just a thought, use the 7206 to terminate the DS3 and hand it off to the MT box via ethernet. that eliminates any potential driver issues or problems with the DS3 card, and the 7206 will be plenty suifficiant to perform that task once you remove BGP from it... btw, what's your free memory level on ...

ldvaden

You try exporting it is a OpenSSH key using their menus ? I will try in a few and see if I can make those work too. Thx, Sam Thanks for the article at <http://wiki.mikrotik.com/wiki/Use_SSH_to_execute_commands_(DSA_key_login)>. However, I've stumbled across these (my) cockpit errors: 1) 'ssh-keygen...

ldvaden

The only one I have ever used is the SBE card.

Thanks for the lead.

rgds/ldv

ldvaden

hello! my question is: every time while RE-assosiating all other clients have packetloss on their public-ip. - is there a way to prevent such PL? (except making the singnal stronger :) ) chris There is a post elsewhere in this forum, namely at <http://forum.mikrotik.com/viewtopic.php?p=21344&si...

ldvaden

ps, a nice processor will help too. More than anything though, Ram RAM is what is causing us to look away from the Cisco 7206s in our stable because of the 256 MB limitation of the NPE-300 (262Mhz). CEF crashes, resulting in a necessary reload if and only if you want to continue with production. Cu...

ldvaden

Is anyone willing to share their experiences with RouterOS/DS3/BGP?

After 11+ years, I'm about fed up with Cisco's policies like limiting access to <http://www.cisco.com/pcgi-bin/Support/B ... bugtool.pl>.

rgds/ldv

ldvaden

Well, the correct setting depends on your network setup. Tell us more about the network, the setup and what you want to achieve. The box is our corporate firewall protecting the help desk and other administrative machines. It resides on the management subnet, 209.151.96.128/27. Our ASN is comprised...

ldvaden

Just a quick glance and an idea: Could it be that the fact that you set your default-route to the l2tp-client is cutting you off? Or is this intended? Thanks for obviously a good question, Christian. While I haven't rigorously proven it yet, it may be the case that the machine is no longer communic...

ldvaden

[quote="ldvaden"]After issuing commands like those in the manual (<http://www.mikrotik.com/docs/ros/2.9/interface/l2tp>), the machine became unavailable. RouterOS version is 2.9.30. What's the cockpit error? An additional view of the ROS host from an offnet system is below the sig. rgds/ld...

ldvaden

yes, it is in dBm, but i suggest to leave this setting to `default` as the card will run at the power that is written in it's EEPROM (the manufacturers recommended value). use it only to lower the power, not to increase it, as overheating will reduce the performance. IIRC, the default value chosen ...

ldvaden

What are the Tx values in Mikrotik equal to? for example what does the value 1 mean? AFAIK, the power is in dBm. see the example below; I hope this information is helpful. My apologies if I didn't understand your question. The output is for a R52: current-tx-powers: 1Mbps:20,2Mbps:20,5.5Mbps:20,11M...

ldvaden

After issuing commands like those in the manual (<http://www.mikrotik.com/docs/ros/2.9/interface/l2tp>), the machine became unavailable. RouterOS version is 2.9.30. What's the cockpit error? rgds/ldv [admin@MikroTik] interface l2tp-server server> set enabled=yes [admin@MikroTik] interface l2tp-serve...

ldvaden

What about them? Going through them? Going above them?
-=Russ=-

Please see <http://www.elsop.com/wrc/humor/ms_helic.htm>, then

s/answer/question/g.

ldvaden

Interfrence lack of power I note that WinBox has "disconnected" three times while the CLI session is still alive. An enter key was pressed on the CLI connection after each time WinBox indicated a disconnection. The CLI session and the WinBox session were to the same interface and IP addre...

ldvaden

ldvaden how many floors do you need to go through? what kind of building in terms of thickness of floors Thanks for your reply. One floor of about 8" of concrete and 3" of sound deadening material (in Dallas' largest data center). Rebar density is unknown. We tried a Motorola Canopy 900 M...

ldvaden

Does anyone have experience with the SR9 and concrete floors (complete with rebar) they would like to share?

rgds/ldv

ldvaden

http://www.mikrotik.com/systems.php#RIC_522

RIC/522

I need link of 5 Mbita to 15 km. Is it possible with RIC/522

Best regards...

IIRC we have a pair of RIC/522s operating at 8.6 miles and the signal strength is about -73 dBm.

rgds/ldv

ldvaden

Hello,

Will 802.11b cpe automagically prefer the R52-based AP with lowest ack timeout other factors (signal strength, etc.) being equal?

rgds/ldv

ldvaden

What are the leading causes of "Router has been disconnected."?

HW environment is RB532, RB112.

rgds/ldv

ldvaden

Hi all her is some of my instalations in Sweden:
//Rickard

At what frequency are the four (4) presumably 90 degree sectors operating?

rgds/ldv

ldvaden

Mikrotik,

What is the output in 802.11b mode running in default mode?

What settings are necessary to get the 19 dBm mentioned on the data sheet?

rgds/ldv

reference: the questions are relative to use in RB/2018, RB532 and RB112.

ldvaden

Well you can't swop the cards out can you? So they remain connected to the same location on the PCI bus... :12 will always stay on the same "named" interface. The question is whether one can count on the lower numbered mac being either ether1 or ether3 and everything else being monotonic,...

ldvaden

Not quite sure what you're talking about

Agreed; I should have stated that the hardware environment is RB532.

rgds/ldv

ldvaden

Hello, Is there a convention in manufacturing for mapping mac addresses to ethernet ports? e.g., if the macs are [vaden@Ombudsman] > /interface ethernet print Flags: X - disabled, R - running # NAME MTU MAC-ADDRESS ARP 0 R local 1500 00:0C:42:09:30:12 enabled 1 R public 1500 00:0C:42:09:30:13 enable...

ldvaden

WinBox has routes 1 and 3 marked as DI in RED. This noob hasn't figured out a way to get rid of them yet (or indeed, determined a correct disposition), so thanks in advance for any help you might offer. Kind regards, Larry Vaden Internet Texoma, Inc. [vaden@ec-pmp-neq-jlv-far] > /ip route print Flag...

ldvaden

what's better to give clients an internet connection throw PPPOE or a simple lan configuration (ip,gateway,DNS)? thank u I ran across befire's question about the same time as I ran across this article on FreeBSD-ISP this afternoon. IMHO, it ties well with and expands on befire's question. What are ...

ldvaden

I need to configure a 20 km link in this feature :
My quastion is, what a hardware I need to use to configure it ?
Lucas

Please visit <http://www.mikrotik.com/3index.php>.

rgds/ldv

ldvaden

What are the likely causes of winbox aborting with say 5 seconds of loading (just after painting a null screen with the menu on the left)? The device is at the far end of a point-to-multipoint link in staging and we can transfer files to and from its client (a lab laptop) via wget. We believe the ha...

ldvaden

We have some RB532s running RouterOS for which we did not (re)name the interfaces as, e.g., Public and Local. Will executing, e.g. [mikrotik] interface> set 0 name Public [mikrotik] interface> set 1 name Local cause loss of connectivity and a resultant truck roll or will the system continue to opera...

ldvaden

If I follow your logic then in parent=ether2...ether2 should be changed to reflect the Public/Internet/WAN interface. In this case ether1. But the rest is correct? Again, this is opinion, not gospel; I'm trying to evade a binary answer to your question by giving examples that I think may be working...

ldvaden

What I'm asking is; WHO is the source or destination in P2P traffic? The local client's PC is acting as a server so the connection is established by the P2P network. I guess the “uploaded” packets will have the local client as the source. The last thing I remember memorizing was the list of countie...

ldvaden

please explain to us latvians, what do you mean by `hairy` Hi, Normis! Thanks for your question. Like a Congress Critter, I enjoy revising and extending my remarks --- but, also like a Congress Critter, I ask you to please not hold me to anything I may have written in the past, including the follow...

ldvaden

Has anyelse else experienced/noticed that winbox's trigger for "router has been disconnected!" is a little hairy?

I believe I have also seen contradictions, namely counters still incrementing in the background behind the popup.

rgds/ldv

ldvaden

When I set up a Simple Queue for an IP address/customer. My brain wants to think (for the IP address I entered under the general tab) I can select "p2p-all", select the mangled packet mark for p2p, select the corresponding Interface, and then set a target Upload and Download. RouterOS alw...

ldvaden

I have the latest firmware on the cpe's but the problem seems like the access point didn't intialize the wireless card. Even my laptop with built in wireless doesn't get a signal 100 feet away when this happens. Another possibility might be that the wireless card didn't respond to the AP's initiali...

ldvaden

My goal is to slow ALL P2P traffic to 15k/290k and keep other traffice at the customers speed. I can't seem to get the P2P queues to work. I tried creating a P2P queue with a “customer” queue as the parent. I tried creating P2P queue with a higher priority. I still have customer with 256k/480k of e...

ldvaden

can you send the way you did this ? I would like to do the same.. thanks I hope this is helpful: http://forum.mikrotik.com/viewtopic.php?t=8544 The technique there is based on information from MikroTik documentatiion and employees and from the user community in this forum and from the wiki at http:...

ldvaden

And from this you see p2p speeds drop when all other traffic needs to the bandwidth? Short answer: we think the answer is yes. Longer answer: First, an attribution: documents and employees of MikroTik and the user community of which this forum consists are the sources of how to do this. The first t...

ldvaden

Tried that, Created a Queue tree like this <snip>...</snip> But i still see the same result, any ideas? As a noob to ROS I'm not sure the following will be helpful, but it is submitted in the eventuality that it is helpful or that someone will make helpful comments about what is wrong with this app...

ldvaden

The CM9s should be good for your links but I've heard a lot of good things about Mikrotik's new R52 card.

The R52s are worth the $113/pound of freight FedEx will charge you for the first pound of a shipment from Latvia to the US. 10 pounds worth of R52s are an even better buy!

rgds/ldv

ldvaden

The SR2 is in AP Bridge mode and everytime you reboot, loose power or apply a new setting the clients rarely reassociate without diabling and renabling the wireless interface several times. When I say several times I mean 10 to 200 times before clients come back online. We run both Cisco 1300 APs a...

ldvaden

for when you have a few invocations of Winbox active and wonder which one just disconnected.

thnx/rgds/ldv

ldvaden

<http://wiki.mikrotik.com/wiki/Special:Recentchanges>

thnx/rgds/ldv

ldvaden

What are the likely origins of these connections? (those not of interest have been redacted) Thanks in advance for your comments. ldv [vaden@lp-ap] > ip firewall connection print Flags: S - seen reply, A - assured # PR.. SRC-ADDRESS DST-ADDRESS TCP-STATE TIMEOUT 17 tcp 10.6.203.25:8102 a.b.123.237:3...

ldvaden

Hello, What phase of packet flow diagram does both simple queues, and queue trees do take part at? <http://www.mikrotik.com/docs/ros/2.9/root/queue> may be helpful to you. If that doesn't work for you, try Googling a variant of 'site:mikrotik.com "queue trees" flow diagram'. Kind rgds/ldv

ldvaden

yes, please leave `tx-power` to `default` if you want the cards to work at their maximum. if you change this value, the cards will not work as good. If you are not in Region 1 (Brazil, Canada, Taiwan, USA) and aren't a newly minted idiot like me, you may want to skip reading the rest of this post :...

ldvaden

Yes I have the TR-CPQ19's running with 2.9.17. Make sure you have the latest firmware, 89R fixes a major memory leak issue with the tranzeo when associating to 802.1d AP's, and the latest 2.0.6 has more detailed connection information, % of dropped packets, noise floor, etc.. We're there, save for ...

ldvaden

The CPE's are Tranzeo CPQ-19's and Zcomax CPE-250H(P) When I switch to rx-a/tx-b the noise floor drops to -100, and clients associate with great signals -50 to -60dB and SNR in the 40's.. I'm using the MMCX port on the ubiquiti cards instead of the u.fl. Are you saying you've got CPQ-19s running wi...

ldvaden

Hello, This post seeks your choices and opinions regarding: 1) which do you use - the u.fl or the mmcx connector? 2) do you solder the pigtail connector to the minipci card in an effort to increase the mechanical sbability? ?2 comes as a result of observing (not using :) a Proxim MP.11a. Kind regard...

ldvaden

you're right but it could be done already, e.g:

ssh admin@192.168.255.1 "/log print without-paging" | grep info

Thanks for your post.

rgds/ldv

ldvaden

There are a lot of press releases about IEEE 802.11s WLAN-Mesh proposal
e.g. http://standards.ieee.org/announcements ... posal.html.

Sorry, but the page you have requested

http://standards.ieee.org/announcements ... posal.html.

does not exist on this site.

ldvaden

A facility similar to that of IOS which allows piping CLI output through a filter.

e.g.,

/log print | grep -i extensive

or

/log print | incl extensive

rgds/ldv

ldvaden

Hello,

Are there plans to support the SR9 or is the support already present?

Kind regards/ldv

ldvaden

Background: goal is to insert MikroTik acting as a transparent bridge between Cisco and EtherSwitch. There are multiple (and increasing due to growth) VLANs in use on the pipe. <http://www.mikrotik.com/docs/ros/2.9/interface/vlan> says in part: And VLAN successfully passes through Ethernet bridges (...

ldvaden

Long time listener, 2nd time caller :) We are seeing CRC errors detected by a Cisco 7206 (FE6/0). MikroTik is running on a Dell PowerEdge 750 in bridge mode. Disabling the ethernet ports on the Dell and replacing them with two Intel Pro Server cards didn't resolve the problem. If you have experience...

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