Community discussions

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by marekm
Tue Mar 05, 2019 11:34 am
Forum: Announcements
Topic: WPA2 preshared key brute force attack
Replies: 27
Views: 16990

Re: WPA2 preshared key brute force attack

Any known issues with disable-pmkid=yes so far? It's not yet the default (as of 6.44) - why?
by marekm
Thu Feb 28, 2019 8:15 pm
Forum: RouterBOARD hardware
Topic: BaseBox6, SXT6 - CE Full Declaration of Conformity
Replies: 0
Views: 129

BaseBox6, SXT6 - CE Full Declaration of Conformity

Ticket#2019021322006391 Products have the CE mark but I need the full document to get a license from our regulatory authority. Quick Guide says: "Full Declaration of Conformity (DoC) may be obtained by visiting our product page on https://mikrotik.com/products" but I can't find it there for the 6GHz...
by marekm
Fri Feb 22, 2019 9:33 pm
Forum: Wireless Networking
Topic: Nonstandard 60GHz channel, why 66000 and not 66960 MHz?
Replies: 5
Views: 913

Re: Nonstandard 60GHz channel, why 66000 and not 66960 MHz?

Still no support for 66960 or 69120 as of 6.44rc4 - any chance to add that, or is it really not supported by the hardware?
by marekm
Tue Feb 19, 2019 12:22 pm
Forum: RouterBOARD hardware
Topic: hEX PoE + 48v = 802.3af/at only B ?
Replies: 2
Views: 210

Re: hEX PoE + 48v = 802.3af/at only B ?

The two modes A and B are not unexpected, they are fully specified in the 802.3af/at standards. Mode A is over the 10100 data pairs (12/36) and mode B is over the spare pairs (45/78) which are data pairs in gigabit too. Compliant PD (powered device) must accept power in any one of the two modes (in ...
by marekm
Mon Feb 04, 2019 2:42 pm
Forum: RouterBOARD hardware
Topic: wAP ac overheating?Crashing
Replies: 4
Views: 789

Re: wAP ac overheating?Crashing

I'm also seeing wAP ac crashing under load (reboot by watchdog timer) - in my case, it's a "NAT router on a stick" (separate tagged VLANs for WAN and LAN sides) and CPU load from sustained high traffic on the wired side only (wireless mostly idle) is sufficient to trigger the issue. Despite reduced ...
by marekm
Thu Jan 31, 2019 7:11 pm
Forum: Announcements
Topic: February Newsletter #87
Replies: 64
Views: 11182

Re: January Newsletter #87

chipset limit is 8
Any better chipsets (802.11ay?) on the horizon? Ideally, backwards-compatible with current 802.11ad stations so that only the AP needs to be upgraded.
by marekm
Thu Jan 31, 2019 2:42 pm
Forum: Announcements
Topic: February Newsletter #87
Replies: 64
Views: 11182

Re: January Newsletter #87

It would be nice to be able to connect 3x as many stations per sector though - still limited to max 8.
by marekm
Wed Jan 30, 2019 9:15 pm
Forum: RouterBOARD hardware
Topic: CRS328-24P-4S+RM Head-Of-Line blocking?
Replies: 3
Views: 360

CRS328-24P-4S+RM Head-Of-Line blocking?

I have a setup where the CRS328 powers a few APs, and the uplink port (ether24) which shows many Rx overflow errors. Most APs run on gigabit links, except maybe two 100M ones. Total traffic through the switch is like 200-300 Mbps most of the time, so the Rx overflows are difficult to explain (no, no...
by marekm
Mon Jan 28, 2019 5:08 pm
Forum: RouterBOARD hardware
Topic: CRS317 10G -> 1G traffic slow, everything else fine
Replies: 19
Views: 5061

Re: CRS317 10G -> 1G traffic slow, everything else fine

The buffer size (RTT times speed) you're mentioning is too large (and is usually referred to as buffer-bloat). Needed buffer size in switch is typically smaller, a few frames (jumbo if needed) per switch. If there's a congestion on single port, flow control needs to kick-in. The buffer size you're ...
by marekm
Mon Jan 28, 2019 1:20 pm
Forum: RouterBOARD hardware
Topic: CRS317 10G -> 1G traffic slow, everything else fine
Replies: 19
Views: 5061

Re: CRS317 10G -> 1G traffic slow, everything else fine

I can confirm it is fixed in 6.43.8. What is the switch buffer size? It might be good enough for LAN use, but still too small for real bursty traffic from the Internet. The buffer should be approximately sized to hold amount of data corresponding to the average RTT (round trip time), and in a switc...
by marekm
Tue Jan 22, 2019 9:20 pm
Forum: General
Topic: per mac-address pcq-classifier
Replies: 8
Views: 862

Re: per mac-address pcq-classifier

Still waiting for this feature in 2019. And yes, it is possible to drop some packets from a pppoe connection, this simply causes drop of IP packets that were encapsulated inside. Only if too many (LCP Echo request/reply) are dropped, pppoe disconnects. Long long ago, upstream bandwidth was limited (...
by marekm
Thu Jan 10, 2019 7:10 pm
Forum: Announcements
Topic: v6.42.11 [long-term] is released!
Replies: 42
Views: 7311

Re: v6.42.11 [long-term] is released!

1) Set Country, follow regulations, follow frequency list, output power, trust automatic settings like DFS etc. 2) Set no-country, use manual power, manual frequency, manual all things. 3) Set Country for default frequency list (follow regulations in that respect), Superchannel to allow manual powe...
by marekm
Sat Jan 05, 2019 10:27 pm
Forum: Wireless Networking
Topic: Nstreme and fairness
Replies: 0
Views: 157

Nstreme and fairness

Is there a plan to implement some kind of fairness on the AP side, to avoid excessive packet loss? I mention Nstreme because other protocols (802.11, nv2) almost don't work here (too much interference), Nstreme works to some degree but still causes a few percent of packet loss during peak hours (wit...
by marekm
Sat Jan 05, 2019 10:16 pm
Forum: Wireless Networking
Topic: 60GHz proximity and colocation
Replies: 13
Views: 743

Re: 60GHz proximity and colocation

In my case it was wAP60 (PtMP) about 1m above LHG60 (PtP), and PtMP started dropping connection when the PtP link had significant traffic, despite running on distant channels (wAP at 58320, LHG at 64800) so the radios don't have good selectivity (just like all cheap radios with no real analog filter...
by marekm
Mon Dec 24, 2018 4:44 pm
Forum: RouterOS v6 RC and v7 BETA
Topic: Report "Delegated-IPv6-Prefix" attribute for PPPoE
Replies: 178
Views: 31162

Re: Report "Delegated-IPv6-Prefix" attribute for PPPoE

+1 Mikrotik, please tell us some estimated timeframe when this feature will be finished, so we can decide: wait longer, or go with accel-ppp on Linux instead (it's a lot of work, so it would not be fun to do all this work only to find out it was unnecessary because you finally implemented this featu...
by marekm
Mon Dec 24, 2018 4:34 pm
Forum: Announcements
Topic: v6.43.8 [stable] is released!
Replies: 169
Views: 28178

Re: v6.43.8 [stable] is released!

I've CPE scheduled to autoupgrade via scheduler script "/system package update download;" on all CPE's. This update is just messing things up. After every autoupdate. Have to site visit every client just to change from regulatory to superchannel. What a pain. If the frequency mode is set to superch...
by marekm
Sun Dec 23, 2018 1:32 am
Forum: Wireless Networking
Topic: 6.43.8 UPDATE ALERT READ BEFORE UPDATE
Replies: 5
Views: 805

Re: 6.43.8 UPDATE ALERT READ BEFORE UPDATE

I use country setting with superchannel as a way to set default scan-list and then add licensed frequencies to it (scan-list=default,5940-6100). country=no_country_set means FCC compliant set of channels, so scan-list may need to be set first to avoid losing connection (if the current channel is not...
by marekm
Thu Dec 13, 2018 5:17 pm
Forum: Wireless Networking
Topic: New 60ghz channel release expectation
Replies: 4
Views: 478

Re: New 60ghz channel release expectation

Why not 66960 and 69120 (channels 5 and 6) - is 66000 really the highest frequency current hardware can handle?
by marekm
Mon Nov 19, 2018 6:27 pm
Forum: RouterBOARD hardware
Topic: MUM Europe 2018 - New hardware incoming
Replies: 50
Views: 14102

Re: MUM Europe 2018 - New hardware incoming

The chipset has been discontinued, linux dropped support for it, and the new RB4011 pulls down full BGP feeds faster than a CCR1072. It's time for something new in the 1036/1072 range. RB4011 and RB1100AHx4 have only 1GB of RAM soldered (not expandable by changing a SODIMM) - is this sufficient to ...
by marekm
Mon Nov 19, 2018 3:39 pm
Forum: RouterBOARD hardware
Topic: RB 750UP SoC replacement: possible troubles?
Replies: 2
Views: 409

Re: RB 750UP SoC replacement: possible troubles?

If you only replace the SoC (not the flash) and solder it well (without damage to the board) - I think it should work fine. I don't think this SoC itself contains any serial number.
by marekm
Wed Nov 07, 2018 12:05 pm
Forum: Wireless Networking
Topic: is Dynadish6 dead?
Replies: 1
Views: 347

Re: is Dynadish6 dead?

It would be nice to see a new revision of it - as the first one didn't perform too well. Compared to NetMetal5 in superchannel mode (as BaseBox6 was not available yet), good 23dBi panel antenna (ElboxRF TetraAnt6) had a few dB stronger signal than DynaDish6. The integrated DynaDish6 antenna was like...
by marekm
Mon Oct 29, 2018 5:44 pm
Forum: Wireless Networking
Topic: LHG 60G experience
Replies: 504
Views: 41640

Re: LHG 60G experience

3765m - https://ispforum.cz/download/file.php?id=8741 4173m - https://ispforum.cz/download/file.php?id=8742 These long-range links use a non-standard and illegal 66000 frequency. Any chance for MT to implement 66960 and possibly 69120 too? Still illegal in many parts of the world, but at least stan...
by marekm
Thu Oct 25, 2018 3:24 pm
Forum: RouterBOARD hardware
Topic: Wish: 60GHz Pro Model
Replies: 12
Views: 1375

Re: Wish: 60GHz Pro Model

The new RouterOS releases allow stable connection over 2Km with existing LHG60. We have running links, works fine now in the autumn rain. At which frequency, and why 66000 (overlapping with 64800) and not 66960 (channel 5 with the standard 2.16GHz spacing above 4)? As for Pro model - yes I want it ...
by marekm
Mon Oct 22, 2018 10:20 pm
Forum: Wireless Networking
Topic: Nonstandard 60GHz channel, why 66000 and not 66960 MHz?
Replies: 5
Views: 913

Nonstandard 60GHz channel, why 66000 and not 66960 MHz?

This non-standard channel overlaps with channel 4 (64800) as channels are 2.16 GHz wide. Non-overlapping would be channel 5 at 66960 (and 6 at 69120 if the hardware can ever go that far). Is this 66000 really the highest frequency the hardware can support? Or is it due to some country regulations (p...
by marekm
Fri Oct 19, 2018 1:20 pm
Forum: Wireless Networking
Topic: LHG 60G experience
Replies: 504
Views: 41640

Re: LHG 60G experience

66000 GHz is non standard freq for this band? Will You implement 66960 GHz and 69120 GHz? it's not a standard channel This source mentions 6 channels (ch5 = 66960, ch6 = 69120 MHz): https://en.wikipedia.org/wiki/Wireless_Gigabit_Alliance#Channels "Regional spectrum allocations vary by region limiti...
by marekm
Thu Oct 11, 2018 7:51 pm
Forum: RouterOS v6 RC and v7 BETA
Topic: Report "Delegated-IPv6-Prefix" attribute for PPPoE
Replies: 178
Views: 31162

Re: Report "Delegated-IPv6-Prefix" attribute for PPPoE

1) Add new pool with prefix that you want to assign to your PPPoE client; 2) Add new PPP profile and select this pool; 3) Send from RADIUS "Mikrotik-Group" parameter which is equal with this profile name. The workaround may be fine when testing IPv6 on just a few customers, but doesn't scale well t...
by marekm
Wed Oct 10, 2018 7:28 pm
Forum: RouterOS v6 RC and v7 BETA
Topic: Report "Delegated-IPv6-Prefix" attribute for PPPoE
Replies: 178
Views: 31162

Re: Report "Delegated-IPv6-Prefix" attribute for PPPoE

Changes regarding pools are not reverted. Fix changes how "solicit" packet is processed received from DHCPv6 clients that didn't have "Rapid Commit" enabled.
Could you give a clear answer about Delegated-IPv6-Prefix support in PPPoE server? Will it work in 6.44 / 6.45 / 7.x ?
by marekm
Wed Oct 10, 2018 2:16 pm
Forum: RouterOS v6 RC and v7 BETA
Topic: Report "Delegated-IPv6-Prefix" attribute for PPPoE
Replies: 178
Views: 31162

Re: Report "Delegated-IPv6-Prefix" attribute for PPPoE

Next 6.43 release and 6.44beta21 will contain fix for this problem. So PPPoE with DHCPv6 PD should work exactly the same as it did before v6.43. So PPPoE *client* will work as it did, but how about PPPoE *server* with DHCPv6 PD and Delegated-IPv6-Prefix attribute (which didn't work without workarou...
by marekm
Mon Oct 08, 2018 7:41 pm
Forum: RouterOS v6 RC and v7 BETA
Topic: Report "Delegated-IPv6-Prefix" attribute for PPPoE
Replies: 178
Views: 31162

Re: Report "Delegated-IPv6-Prefix" attribute for PPPoE

Looks like it is fixed in the 6.44 beta: https://forum.mikrotik.com/viewtopic.php?f=21&t=139057&start=50#p689985 *) dhcpv6-server - recreate DHCPv6 server binding if it is no longer within prefix pool when rebinding/renewing; Does this mean 6.44 will finally support running a dual-stack PPPoE serve...
by marekm
Sun Oct 07, 2018 2:11 am
Forum: RouterBOARD hardware
Topic: 100Mb LAN - what's the point?
Replies: 13
Views: 1392

Re: 100Mb LAN - what's the point?

The 100Mb port in Lite60 devices might make sense if the AP allowed much more than 8 stations to connect. It's a very rare situation where everyone uses their full bandwidth at the same time. Not even fiber networks are made like this, GPON is 2.5Gbps split between 128 customers which gives average ...
by marekm
Fri Oct 05, 2018 5:42 pm
Forum: RouterBOARD hardware
Topic: LHG 60G disable beam forming [SOLVED]
Replies: 31
Views: 4248

Re: LHG 60G disable beam forming [SOLVED]

Does beamforming work in both directions (TX/RX) - or is it TX only? I can see many different and changing tx-sector values, but rx-sector seems to be always 96. Or is it just not reported properly?
by marekm
Mon Sep 24, 2018 6:36 pm
Forum: RouterBOARD hardware
Topic: Bridge split-horizon vs hw-offload
Replies: 5
Views: 675

Re: Bridge split-horizon vs hw-offload

Good to know, I thought VLAN was something basic that should be hw-offloaded on all products (except mixing tagged and untagged on the same port - "hybrid ports" are not supported by some cheap "smart" switches, it could be that some switch chips really can't do it even though they can do VLANs).
by marekm
Sun Sep 23, 2018 12:08 am
Forum: RouterBOARD hardware
Topic: Bridge split-horizon vs hw-offload
Replies: 5
Views: 675

Re: Bridge split-horizon vs hw-offload

I use bridge VLAN filtering, and hw-offload works fine here on CRS328-24P-4S+ with ROS 6.42.7 and now 6.43.2 - as long as I don't try to isolate ports by setting horizon.
by marekm
Sat Sep 22, 2018 3:42 pm
Forum: RouterBOARD hardware
Topic: Bridge split-horizon vs hw-offload
Replies: 5
Views: 675

Bridge split-horizon vs hw-offload

Some switch chips have a feature (also supported in SwOS - forwarding table) where for N ports there is matrix of NxN bits to allow forwarding between any combination of ingress/egress ports. Why isn't bridge split-horizon hw-offload implemented simply by grouping ports by the same nonzero horizon v...
by marekm
Tue Sep 11, 2018 12:02 pm
Forum: Announcements
Topic: Newsletter #84
Replies: 47
Views: 11378

Re: Newsletter #84

That would be nice but unfortunately RBx00x devices are just too big to be mounted side by side in a 19" rack RB2011iL Dimensions Desktop:230x90x25mm There are rack cases that fit two RB2011 boards (bare boards without cases) inside. https://www.cyberteam.pl/produkt/1997_panel-mikrotik-rack-19-2-x-...
by marekm
Tue Jul 31, 2018 1:07 pm
Forum: SwOS
Topic: CRS328-4S-20S-4S+ First Day Fail?
Replies: 11
Views: 1356

Re: CRS328-4S-20S-4S+ First Day Fail?

Such things shouldn't happen in properly designed hardware - proper low voltage reset circuits are cheap and easily available. But as a workaround, add a resistor to discharge the capacitors faster - if the voltage on them during normal operation is 3.3 volts, use something like 100 ohms. Or a small...
by marekm
Sat Jul 21, 2018 11:16 pm
Forum: RouterOS v6 RC and v7 BETA
Topic: [6.43rc44] Hardware offloaded bridge and 'Switch Port Isolation' not working.
Replies: 3
Views: 683

Re: [6.43rc44] Hardware offloaded bridge and 'Switch Port Isolation' not working.

Even old SwOS on RB250GS and RB260GSP allows setting up the matrix specifying between which ports traffic can be forwarded. So it's a pretty basic switch chip feature that even simple switch chips should have, that just needs to be properly exposed in RouterOS to allow port isolation.
by marekm
Sat Jul 21, 2018 11:08 pm
Forum: RouterOS v6 RC and v7 BETA
Topic: No POE Power Cycle @ hEX POE
Replies: 12
Views: 2387

Re: No POE Power Cycle @ hEX POE

I can confirm the same issue still in 6.42.6 on RB960PGS, PowerBox Pro, and OmniTik 5 PoE ac too. PoE Out off/auto-on/forced-on settings work normally, but Power Cycle does nothing as if MT simply forgot to implement it (tested both winbox and command line, doesn't even wait for the specified 5 seco...
by marekm
Mon Jul 16, 2018 6:41 pm
Forum: Announcements
Topic: v6.42.6 [current]
Replies: 102
Views: 25667

Re: v6.42.6 [current]

What's new in 6.42.6 (2018-Jul-06 11:56):
*) w60g - fixed random disconnects;
*) w60g - general stability and performance improvements;
Disconnects (a few times per hour, started in 6.42.5, not a single one in 6.42.4) still not fixed for me, supout files sent again [Ticket#2018062622003837].
by marekm
Mon Jul 02, 2018 6:13 pm
Forum: Announcements
Topic: v6.42.5 [current]
Replies: 124
Views: 18985

Re: v6.42.5 [current]

At what power output are you right now? You will need to lower power output even more to something in range from 1 to 5 should be fine for such close distance Default, which is stable in 6.42.4. I have already tried different tx-power values (as suggested by support), there was no link at all with ...
by marekm
Sat Jun 30, 2018 9:53 pm
Forum: Announcements
Topic: v6.42.5 [current]
Replies: 124
Views: 18985

Re: v6.42.5 [current]

*) w60g - general stability and performance improvements; Ticket#2018062622003837 For me, 6.42.5 made w60g less stable (6.43rc34 has the same issues too) than 6.42.4. Wireless Wire Dish kit, 208 m PtP link, testing with UDP 300Mbps/600Mbps btest for many hours, new versions randomly disconnect abou...
by marekm
Sun Jun 17, 2018 12:20 am
Forum: RouterBOARD hardware
Topic: S+RJ10 and Jumbo Frames
Replies: 10
Views: 2159

Re: S+RJ10 and Jumbo Frames

Is the limit exactly 1500? I don't need to pass big (9k) jumbo frames, but need VLAN tags (single ones, not QinQ) and extra 8 bytes for RFC4638 PPPoE traffic, this means minimum L2MTU of 1526 (1514 for standard Ethernet + 8 for RFC4638 + 4 for VLAN). If existing cat5e cables can't be used with S+RJ1...
by marekm
Thu May 31, 2018 7:09 pm
Forum: RouterBOARD hardware
Topic: LtAP mini - does built-in GPS have 1PPS support?
Replies: 1
Views: 531

LtAP mini - does built-in GPS have 1PPS support?

RouterOS has had the ability to work as GPS synchronized NTP server for a long time - but its accuracy was limited by missing 1PPS support. Has this changed in the new LtAP mini product? I haven't found it mentioned anywhere in the docs, but since the product has built-in GPS receiver, it is not con...
by marekm
Sun May 06, 2018 2:15 am
Forum: Wireless Networking
Topic: Only 3 x 60Ghz bands for 60G devices?
Replies: 17
Views: 2208

Re: Only 3 x 60Ghz bands for 60G devices?

Having only 3 channels available might not be enough for 360deg coverage - it would be nice to do a 4-sector ABAB setup using only 2 channels with synchronization. Since there is plenty of bandwidth available, even simple fixed 50/50 uplink/downlink division would be good. NV2 synchronization shows ...
by marekm
Thu Apr 05, 2018 6:41 pm
Forum: Wireless Networking
Topic: Plain 802.11-an better then NV2!
Replies: 7
Views: 1481

Re: Plain 802.11-an better then NV2!

Does this mean 802.11 RTS/CTS works properly now? About 2 years ago it was broken on AC devices (NV2 was bad too, Nstreme was not perfect either but best of them all). The symptoms with RTS/CTS were like it was not avoiding collisions - works fine most of the time with high MCS rates, and just somet...
by marekm
Thu Mar 15, 2018 4:22 pm
Forum: SwOS
Topic: CSS326 slow SFP+ speed
Replies: 24
Views: 5077

Re: CSS326 slow SFP+ speed

Could the performance issues be caused by bursty traffic and too small buffers in the switch? So the traffic is below 1 Gb/s on average, but comes in short 10 Gb/s bursts that overflow a too small buffer resulting in packet loss? The issue is not theoretical, I've seen it already a few times in case...
by marekm
Mon Feb 05, 2018 9:17 pm
Forum: Announcements
Topic: MikroTik News February 2018 (Issue #80)
Replies: 65
Views: 15153

Re: MikroTik News February 2018 (Issue #80)

Question about the CRS112-8P-4S-IN: does it support -48V DC telecom power with positive ground?
by marekm
Fri Jan 19, 2018 8:50 pm
Forum: Wireless Networking
Topic: Station and many APs with same SSID, AP selection algorithm
Replies: 0
Views: 306

Station and many APs with same SSID, AP selection algorithm

It seems the station always selects the AP with strongest signal (even log messages say so), and tries hard to connect only to this one even if repeatedly rejected by MAC ACL. I'd suggest to work more like UBNT does: still try the strongest one first, but if rejected, try the next weaker one, until ...
by marekm
Thu Jan 04, 2018 8:05 pm
Forum: Wireless Networking
Topic: 6GHz products not working well at >=6300 MHz
Replies: 4
Views: 649

Re: 6GHz products not working well at >=6300 MHz

The sudden change of signal and noise floor levels between 6295 and 6300 doesn't look like antenna characteristics, more like some band-switching or up/down-converter circuit active at 6300-6500 MHz. Compared at the same distance (about 3 km): 1. AP (RB922UAGS-5HPacD) + Cyberbajt 6GHz 16dBi/120deg s...
by marekm
Wed Jan 03, 2018 4:19 pm
Forum: Wireless Networking
Topic: Wireless Wire WAP 60G P2MP Beam forming _
Replies: 17
Views: 2451

Re: Wireless Wire WAP 60G P2MP Beam forming _

maximum clients allowed are 8 and in outdoor test very big problems with the hidden nodes when the clients are on the same line, if the far end client starts trasmtting to AP over 50mb/s other clients lower MCS and sometimes they drop connections. Max distance 200m with signal 40 Does this still wo...