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Posts: 35
Joined: Sat Dec 19, 2009 12:40 pm

MPLS and framentation on v6

Tue Jan 21, 2014 9:54 pm


Are there anyone besides me who have ran into problems with v6 and mpls-mtu=1500? Or is it just me who depend on fragmentation in my cloud?
I do know it's not the best way to build a mpls-cloud but sometimes you just don't have a choice.

It doesnt matter if I use clear-df or not so neither pmtu-d or fragmentation is working, packets larger than 1496 (using one label) or 1492 (using two labels) just disappears without a trace at ingress. No logs, counters or anything like that.

Any ideas how to workaround until MT acknowledges this issue? And that is without increasing mpls-mtu to 1508...

And yes, I have contacted about this.

For the I have a lab for the moment with RB450G running:
                  version: 6.7
               build-time: Nov/29/2013 13:37:20
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Posts: 141
Joined: Thu Dec 01, 2005 1:39 pm
Location: sweden

Re: MPLS and framentation on v6

Mon Feb 03, 2014 9:31 pm

you are not the only one with the problem one of my customer have the same problem and we have so far not got any news from MikroTik
Leo De Geer, Mikrotik Certified Consultant/Trainer #TR0003, MTCNA, MTCRE, MTCWE, MTCTCE, MTCINE, MTCUME, MTCIPv6E MTCSE MTCASE MTCSWE & MikroTik Distributor
Office: +46 325 660 650

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