[c-nsp] MTU on MPLS TE Tunnels w/PA-FE-TX?

[Rodney Dunn]

> > 
> > In the ip2tag path I think we are supposed to fragment before mpls
> > encapsulation.
> 
> Does that cause any performance issues due to the fragmentation and reassembly?
>

There is always a hit.

 
> > This sounds like a bug if it isn't working.
> > 
> > Can you try 12.4 mainline latest and see if it works?
> 
> I'll have to take a look and try it. I don't think I can do so currently on the router this is setup on because it's being used for other things. I'll have another one shortly that I could try this on.
>

Ok.

 
> It seems the easy answer though is bumping the physical MTU size on the FastEthernet interface which appears possible in 12.2(28)SB and 12.2(31)SB as you previously stated.
>

I think what may be happening is we derive the mtu for the tag2ip from the
egress physical mtu setting.

 
> 
> Thanks for your time. :) I'll see what I can find in 12.4. I'll probably end up using 12.2(28)SB or 12.2(31)SB if needed.