MikroTik

Luth

Hi Tomaskir, In my environment i think 1526 of mpls-mtu is enough becouse I don't have vlan. By the way I have a look to your presentation and in parallel I am in contact with mikrotik support. Remember that we have side 1 of infrastracture that work properly so I don't understand why this problem ...

Luth

PPPoE encapsulated in VPLS needs 1530 MPLS MTU... Check page 18 and 19 of the presentation linked in my sig. Hi Tomaskir, In my environment i think 1526 of mpls-mtu is enough becouse I don't have vlan. By the way I have a look to your presentation and in parallel I am in contact with mikrotik suppo...

Luth

Could you try to disable "use-ip-firewall" in bridge-settings of the mpls routers? I saw a strange behaviour in the past after upgrading to version 6. Is not enabled in our environment. By the way bridge in our environment are used only as container of vpls-interface coming from tower to ...

Luth

I currently have an OSPF routed network, I create tunnels using EoIP from each AP to a core router and running a pppoe server on each EoIP tunnel on the core router, this has worked fine for a long time. But EoIP not very efficient on bandwidth. It has about 250 terminated PPPoE sessions across 7 P...

Luth

With EoIP you have poor bandwidth capacity!

In my opinion best solution is a VPLS over MPLS to connect directly (psedowire) rural site to core WAN.

Luth

Hi Guys, this topic is for very experienced Mikrotik professionals or Mikrotik Staff !! This is the scenario: -2 CCR as core routers with 2 BGP upstreams and Full route table recived from both upstreams -2 RB1100 AHx2 as PPPoE Servers and ospf routers with ospf area backbone to talk: 1) with core ro...

Luth

Hi,

we have in a production environment two CCR1016-12G with Router OS v6.12 and 4 BGP session with upstream for each router.
In total 500.000 routes (Full Routing Table) in avarage recived from our upstreams.

No reboot or other issue verified in last month.

Bye,
Luciano

Luth

1) We have 2 CCR1016-12G
2) We have BGP with 2 upstream with 2 session per upstream so, in total, 4 BGP session per router
3) We are stable, no issue at the moment with BGP
4) v6.12

TLCWEB Srl/Baleno Wireless the smaller WISP in south of Italy

Luth

Look @ http://wiki.mikrotik.com/wiki/File:MTUVPLS.png

Answer to your question is, yes! You need 1526 MPLS MTU to transport 1500 byte packet without fragmentation.

Wich version of router os are running your mpls routers? I have got mtu problem with some RouterOS version.

Bye

Luth

Hmmm... Winter time :) https://maps.google.pl/maps?saddr=Sosnowiec&daddr=Wenecja,+W%C5%82ochy&hl=pl&ie=UTF8&sll=46.860191,15.67749&sspn=3.80129,9.569092&geocode=FbhO_wIdT4EjASkpS9r-mdoWRzHbB2UroSpsyw%3BFU9ftQIde-u7ACmJPdbx2rF-RzEvEJK98Majew&oq=Sosnowiec,&t=h&mra=...

Luth

We have been switched onto an MPLS network (BT IP Clear ADSL MAX in the UK) The ISP has specified the PE Router and given us a STATIC LOOPBACK ADDRESS for each site that we have. We have enter this into our CE Router as the WAN address & the routers on each site can see each other via pings etc...

Luth

I have implemented a small network of 9 750G routers. All with MPLS running, and working. With OSPF as the base routing protocol. http://i50.tinypic.com/2cj1v9.jpg I have a VPLS tunnel between router 1 and router 9. Its says its running. The problem is, nothing uses this tunnel. I have tried follow...

Luth

Hi, Just wondered if anybody has experience what kind of RB board could handle BGP multihoning with up to three providers routing a /24 or possibly 2 x different /24 ? We have in use quite a few rb1200 and some rb450g on smaller sites which generally route a /24 each statically. Looking into BGP mu...

Luth

I have a node with two uplinks. I want bgp choose uplink 1the second uplink must accept if uplink 1 is down. How should I set up with that Pre-pend Thanks for your help BGP does not use traditional metrics but makes routing decisions based on path so the only way to "prefer" first uplink ...

Luth

[admin@MikroTik] /interface> pri Flags: D - dynamic, X - disabled, R - running, S - slave # NAME TYPE MTU L2MTU MAX-L2MTU 0 R ether1 ether 1526 1526 1526 1 R bridge1 bridge 1500 1500 2 R MNGT vlan 1520 1496 3 R wlan2 wlan 1540 2290 4 R vpls1 vpls 1500 1500 But winbox not working, only telnet. Web a...

Luth

Hi.. MikroTik RoS is really so powerfull and have full capability to operate on enterprise network... Please see my presentation at Dubai MUM http://mum.mikrotik.com/presentations/AE12/ali.pdf Its present capability of RoS at enterprise Hope its will be use full for all..!! Best regards Ali Sami Al...

Luth

I have in a production environment two Virtual Machine with Mikrotik RouterOS license who recive Full Internet Routing table from our two peer/provider via BGP4 and everything works fine. My friend have an infrastructure olso connected to two european Internet Exchange Point and its hw/sw is Mikroti...

Luth

mrz or other forum expert please reply to my question or try to explain how to do a great job in mtu/l2mtu/mpls-mtu configuration.

Thanks in advance.
Luciano

Luth

hi luth, thanks man, for the info. can you guide me to any help on VLAN communication over wireless link (5Ghz) Point to Point. the problem is that the link just communicates between the physically connected network. other vlans on the same subnet are not able to communicate through the link. -sid ...

Luth

Hello, do you have the PPPoE server (NAS) at a central router in your NOC, or a small one to each tower? What are the pros and cos? I think that is better to a central place, so you have 1 point for authenticate the user and do traffic logging. The CONS are: 1) you have to encapsulate the traffic f...

Luth

Hi Luciano, Use the ping command I posted above to test that your path can pass appropriate sized frames. If not, check the MTU on all your LDP interfaces. I have checked with ping command as you described and the result is "packet too large and cannot be fragmented". From my previous pos...

Luth

Hi all, I have a similar problem and, I think, the problem is olso MTU but I don't know where... Look at attached network layout: rb1-core, rb2-core, rb-core-tower-a and rb-core-tower-b run MPLS with MPLS-MTU interface configured to 1526 in according of my previous ( post replys. On tower sides the ...

Luth

Hi i have changed my design scenario so in my production environment I don't have needs of my previous question.
By the way tray to have look to http://wiki.mikrotik.com/wiki/Vlans_on_ ... nvironment

bye

Luth

Can Mikrotik MPLS handle more than just Ethernet? Can I stick a supported T1 or T3 card into an x86 box and transport it through MPLS to a box on the other side? If I have a box that will take a T3 and plop it onto MPLS, will MT participate in that cloud and carry it to the other side? Trying to fi...

Luth

Hello. I need to have two link (ethernet) on my router. One must be a primary link and if it fails, all traffic must forward to backup link, and if primary link comes active, traffic must redirect again on this links. Is there any solution without scripting or OSPF? Sorry for my poor English :? Why...

Luth

Personnel who are using bgp with RouterOS with 100Mbps link above, and as this is the performance.

I know some people with have 1 Gbps link and based its bgp core routers with mikrotik and speedtest.net enjoy

bye

Luth

We have many guides for this. http://aacable.wordpress.com/2011/07/27/mikrotik-dual-wan-load-balancing-using-pcc-method-complete-script-by-zaib/ Give it a try and report back with issues. Our friend shrek give public ip address to users so, from his core router have bgp session with two upstream pr...

Luth

Thank you Luth :wink: , - R1 routing Table: # DST-ADDRESS PREF-SRC GATEWAY DISTANCE 0 A S 0.0.0.0/0 1xx.x.xx.xx > 1 ADC 10.0.0.0/24 10.0.0.1 bridge_gestHW > 2 Do 10.0.0.0/24 9x.xx.xx.3 > 10.0.0.2 > 3 ADC 10.0.0.1/32 10.0.0.1 loopback > 4 ADC 9x.xx.xx.0/24 9x.xx.xx.2 bridge_gestHW > 5 Do 9x.xx.xx.0/...

Luth

ok, but if you want to *limit* p2p traffic? I think that some one provide internet access can't "inspect" traffic that carry out but... bandwith cost lot of money so limit this type of traffic I'think is a good compromise! So can you try to modify the solutions you have posted to a version...

Luth

Can you post /ip route print of r1 and r2 ? In your ospf configuration you redistribuite directed connected? Why you use private ip address space for interconnection of r1 and r2? Are you sure that your upstream provider route to your /30 on r1 the new /24 that you wanto to give to your ppp customer...

Luth

OK, please see the attached file and let me know if you need any more info. Ok, I don't now specific configuration of hp switch but I suppose i similar to Cisco switch so: -the ethernet port of the switch where is connected AP1 must be a trunk that transport traffic of secured netowrk (I assume for...

Luth

@Luth, Ciao Luciano, Could you explaine a small example about a configuration only with mpls without vpls? Ciao Carlo Hi Carlo, when i study the scenario I'm based with this two link: Presentazione MPLS dal MUM di Praga del 2009 MPLS/VPLS dal wiki Best regards, Luciano -- Ciao Carlo, quando ho &quo...

Luth

/interface wireless set 0 band=5ghz-onlyn disabled=no ht-rxchains=0,1 ht-supported-mcs="mcs-0,mcs-1,\ mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7,mcs-8,mcs-9,mcs-10,mcs-11,mcs-12,mcs-13,\ mcs-14,mcs-15" ht-txchains=0,1 l2mtu=2290 mode=station-wds \ nv2-preshared-key=*** nv2-security=enabled radio...

Luth

@samsung172 Your scenario mix your transport network with customer traffic... You have only internet broad band customer? If you must sell e direct private link between two or more customer site?? @ab130kd It work becouse BGP see address of pppinterface on the APs directly connected and so redistrib...

Luth

I think the problem is in your html coding, btwm if you want to load content from an external webserver, you can setup the walled garden and permit traffic for the ip address of external webserver. Try to move the post in the Wireless Networking or general forum, here in the forwarding protocol i th...

Luth

Hi, VPLS instead EoIP is a good idea. About your problem I think you must do troubleshoting at routing level. You know that mpls/vpls requires a working routing layer. Can you give more detail about your configuration/topology? How you have configured transport? What interface? What ip address? Can ...

Luth

LSP is Label Switched Path. This is the path through the MPLS network. You must set MPLS MTU =1526 on all router board that partecipating in the mpls. L2MTU must be >=1526 on all interfaces that are added to LDP interfaces and can be used in LSP. Ok, but the value of 1526 is valid if I want to forw...

Luth

To forward 1500 byte packet inside VPLS without fragmentation you have to set MPLS MTU to 1500+14+4+4+4=1526. Also make sure that all interfaces in LS Path has L2MTU set to at least 1526. Hi Mrz, thank you for prompt reply. I must set MPLS MTU =1526 on all router board that partecipating in the mpl...

Luth

Hi guys, I'm a little confused about mtu and l2mtu configuration/aspect of my new laboratory network setupped in this holidays! Network is composed of some RB411AH partecipating in a OSPF network (I call backbone); over OSPF network I have operated the setup of MPLS network; over mpls network there ...

Luth

Hi All, I have alredy posted question in RouterOS Community Support [General], but if the issue is related on ospf/mpls this forum shuld be the correct place to post. I'm trying to setup this scenario: Cisco Catalyst Switch with ethernet port in trunk wich allow some vlan (vland id are 10, 50, 51 ec...

Luth

Hi all, this is my first post here after many month of intersting reading! My scenario (attached jpg): Switch Cisco Catalyst with access vlan to serve ethernet client, trunk port to serve rb411 on all rb411 I have defined vlan interface on ether1 phisical interface Problem: when I setup OSPF and MPL...

Luth

Hi All, this is my first post here after many month of reeding. I'm trying to setup this scenario: Cisco Catalyst Switch with ethernet port in trunk wich allow some vlan (vland id are 10, 50, 51 ecc.) In this port trunk I have connected the ether1 of rb411 of side A On this rb411 i have defined vlan...

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