[afnog] Problem bringing up MPLS on disimilar interfaces

[Mark Tinka]

On Friday 03 October 2008 18:05:23 John Tully wrote:

> Probably the VPLS pseudowire fragmentation and reassembly
> (<http://tools.ietf.org/html/rfc4623>RFC 4623) can help
> when the interfaces don't support the frame size.  This
> is supported in RouterOS.

This is at a much higher level than the issue the OP was 
facing at the time.

VPLS is an MPLS application. However, basic MPLS forwarding 
needs to work before one can add applications on top of it.

With each MPLS label requiring 4 additional bytes, and with 
the increase in label depth as applications such as 
l2vpn's, l3vpn's and Traffic Engineering are added, it's 
vital the core MTU be sufficient enough before customer 
applications such as PWE3 can be brought into play.

Cheers,

Mark.
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