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MPLS MTU on various ethernet controllers

Is there some documentation available which router ethernet interface controller supports which maximum frame size ?

Background:

We have some intra-PoP crossover FE connections in an MPLS VPN based network. To avoid fragmentation we'd like to increase the mpls mtu to e.g. 1520bytes. I know that this isn't an issue on a PA-2FE-TX (7206-VXR), but there are also c3745 used as PE / P boxes. Does anybody know what frame sizes the onboard FEs of the 3745 and the NMs of these platforms (e.g. NM-2FE2W) can support ?

There is a document available for switches on CCO:

http://www.cisco.com/warp/public/473/148.html

Something in that style whould be great ...

thanks,

Stefan

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Community Member

Re: MPLS MTU on various ethernet controllers

Any update on this ?

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