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nz_monkey
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Re: Problems with MPLS IPv4 VPN

Wed Feb 19, 2014 4:00 am

I still cannot se exactly why CE Devices want to know about all vrf's and routing's in MPLS cloud. It should know about it own routes, and Gateways. If running a bgp outside the MPLS, but inside the vrf, CE should still have the full Routing table that is usful to Customer, and would update the vrf With internal "own" subnets/routes. I just let CE know about the default (Routing table) via ospf (if CE should have l2VPN) and just running a bgp, without internal confederation and l3VPN at last point (PE-CE) (without default Routing table). This also make the problem about what vrf to run services to to dissappere. Its a bit annoing to not have managment to Devices, but its possible to have a link net to just have mgmt, and not run full ospf/bgp/MPLS to just do managment. Usualy my vrf's is Public IP's from different ISP's and my default via ospf, is rfc1918 for ospf/MPLS/loopback. Bgp via vpn4, l2vpn-cisco and confederation inside different AS set. All MPLS routers would have its own internal AS in the confederation and produce the non agregated table for AS set that peer With global transits.
The issue we have is that there is no working equivalent of the IOS/JunOS commands:

show ip bgp vpnv4 vrf vrf-nzr-wan neighbors 172.16.95.1 advertised-routes
show ip bgp vpnv4 vrf vrf-nzr-wan neighbors 172.16.95.1 received-routes
show ip bgp vpnv4 vrf vrf-nzr-wan neighbors 172.16.95.1 routes

in RouterOS. This prevents us from seeing what prefixes we are advertising/receiving/using to/from CE routers with BGP. Most of the time we are just advertising everything in the customers VRF, but occasionally we want to block leaked management ranges from being advertised to the customers CE device, at the moment we cannot easily confirm that our filters are working correctly, or what ranges we are receiving from a peer inside a routing instance.
And there is other more annoing problems, like 100mb/s to Cisco, that make the CCR's freeze etc. (We had 1500 CPE Down today, couse of this problem a technican put wrong GE on a cisco to 100mb/s) (No its not fixed in 6.10, like it supposed to)
Yes this problem is extremely annoying, we too are still experiencing this issue. Connect a CCR to a Cisco device and set the port at 100mbit FDX, after a random period of time (from within hours, to 6 weeks) connectivity will drop completely, you check the port config on the CCR and notice it somehow now has a speed of 1gbps listed, the only fix at the moment is to reboot the CCR :( We had to dig a bunch of HP1800's out of retirement to sit between CCR's and Cisco devices and convert from 1gbps/AUTO to 100/FDX just so our client networks stopped dropping out.
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richinuk
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Re: Problems with MPLS IPv4 VPN

Sat Apr 25, 2015 1:00 am

Hey guys.

It's been a while since this was last discussed - what's the current feel on stability of the layer 3 VPN's, particularly with BGP as PE-CE protocol? Good for production?

Rich
 
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nz_monkey
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Re: Problems with MPLS IPv4 VPN

Sat Apr 25, 2015 1:42 am

Hey guys.

It's been a while since this was last discussed - what's the current feel on stability of the layer 3 VPN's, particularly with BGP as PE-CE protocol? Good for production?
Rich
Hi Rich,

Yes it works well. We run 6.5 and 6.19 iin production with L3VPN and use BGP for PE-CE routing.

If you are filtering routes just be careful sometimes(a lot of the time) route filters won't work at all and you will need to delete them and re-re-add them. This has been an ongoing problem with RouterOS. It will likely be fixed in v7

Andrew
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richinuk
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Re: Problems with MPLS IPv4 VPN

Sat Apr 25, 2015 2:30 am

Sweet. Thanks for that.

Rich
 
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Re: Problems with MPLS IPv4 VPN

Tue Apr 28, 2015 8:07 pm

We have also seen a lot of stability improvements running L3VPN in RouterOS since it was fixed a few versions ago. We are also using BGP for the PE / CE handoff for most deployments.

Now we just need fast reroute :-)
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Re: Problems with MPLS IPv4 VPN

Wed Apr 29, 2015 12:27 am

Now we just need fast reroute :-)
Also need LSP ping and TE Auto-tunnel !

Did anyone else notice mplsguy from Mikrotik has disappeared ?
He was brilliant at giving answers on the more complex aspects of RouterOS.
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Re: Problems with MPLS IPv4 VPN

Fri May 01, 2015 12:38 am

Interesting...I wonder who deals with MPLS more often at MikroTik? We are always working on complex multi-vendor MPLS networks that involve MikroTik and it's nice to have a product expert to bounce the high level development stuff off of.
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Re: Problems with MPLS IPv4 VPN

Fri May 01, 2015 5:21 am

I have dealt with two people at Mikrotik in regards to MPLS over the past 5 years. In the last 2 years though I have only dealt with one.

Mikrotik support seem to allocate certain engineers to the more specialist areas e.g. wireless and MPLS.
For other areas I have had responses from many different people.
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Re: Problems with MPLS IPv4 VPN

Wed Jun 03, 2015 8:36 pm

We are working on an MPLS network that includes x86 routers and routerboards which has been running well on MPLS with VPLS on 6.24, but in converting to L3VPN recently, we experienced some issues with LDP neighbors flapping. We haven't completely ruled out MTU issues in the transport, but did see a few bugs as we experimented with different versions.

Just curious to see of those of you running MPLS networks what your experience has been using MPLS/BGP/OSPF in Versions 6.20 through 6.29
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Re: Problems with MPLS IPv4 VPN

Wed May 11, 2016 6:04 pm

Hi,
would like to know if some have experiment issue with bug fix version 6.30 and more, using BGP/MPLS/VPNv4 ?

Don't see any other post on these since june 2015... I guess all is fine ?!

Regards,
Michael Plourde
 
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Re: Problems with MPLS IPv4 VPN

Wed May 11, 2016 6:55 pm

Many of our customers are service providers and run MPLS/BGP/OSPF on MikroTik hardware as well as integrating MikroTik with vendors like Cisco, Juniper, Brocade, etc. We have been recommending and using the bugfix version since it came out and it has been extremely successful and stable.

The latest bugfix right now is 6.32.4 and it is very stable on MPLS/BGP and OSPF networks. Be sure and migrate all of your routers to the same bugfix version as soon as it is practical to get the the best stability.
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Re: Problems with MPLS IPv4 VPN

Fri Aug 19, 2016 11:33 am

Anyone here seen high CPU usage spikes in 'unclassified' due to flapping bgp vpnv4 route ?
I have few vpnv4 prefixes flapping and it terribly affects performance of my CHR (6.37rc16) installation.
 
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Re: Problems with MPLS IPv4 VPN

Sat Mar 02, 2019 10:34 pm

I have dealt with two people at Mikrotik in regards to MPLS over the past 5 years. In the last 2 years though I have only dealt with one.

Mikrotik support seem to allocate certain engineers to the more specialist areas e.g. wireless and MPLS.
For other areas I have had responses from many different people.
Hi,
i have the same experience with you til today 6.44, regarding bgp withdraw issue on mpls.
once they promise it will fix on v7, but v7 never show up.
we have mikrotik mpls on our production, but to solved this issue i have to use some cisco PE instead.
problem happen if you use multihoming BGP between CE to 2 CE.

thx
 
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nz_monkey
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Re: Problems with MPLS IPv4 VPN

Mon Mar 04, 2019 9:26 am

I have dealt with two people at Mikrotik in regards to MPLS over the past 5 years. In the last 2 years though I have only dealt with one.

Mikrotik support seem to allocate certain engineers to the more specialist areas e.g. wireless and MPLS.
For other areas I have had responses from many different people.
Hi,
i have the same experience with you til today 6.44, regarding bgp withdraw issue on mpls.
once they promise it will fix on v7, but v7 never show up.
we have mikrotik mpls on our production, but to solved this issue i have to use some cisco PE instead.
problem happen if you use multihoming BGP between CE to 2 CE.

thx
I am all too familiar with this issue.. it is a VPNV4 NLRI update problem.

Mikrotik support confirmed it back in 2014 but there is still no fix.
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buset1974
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Re: Problems with MPLS IPv4 VPN

Wed Mar 06, 2019 6:15 am

I have dealt with two people at Mikrotik in regards to MPLS over the past 5 years. In the last 2 years though I have only dealt with one.

Mikrotik support seem to allocate certain engineers to the more specialist areas e.g. wireless and MPLS.
For other areas I have had responses from many different people.
Hi,
i have the same experience with you til today 6.44, regarding bgp withdraw issue on mpls.
once they promise it will fix on v7, but v7 never show up.
we have mikrotik mpls on our production, but to solved this issue i have to use some cisco PE instead.
problem happen if you use multihoming BGP between CE to 2 CE.

thx
I am all too familiar with this issue.. it is a VPNV4 NLRI update problem.

Mikrotik support confirmed it back in 2014 but there is still no fix.
Yes, in Multi homing CE, bgp attribute were ignored when best path withdraw.
prefix with longer path were chosen and last prefix advertised seem were ignored.

Can all be rewrite and fix in v6, so we don't have to wait v7 years.

thx

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