On Nov 29, 2011, at 10:07 PM, Christopher Morrow wrote:

> it's not always the filtering of packet-too-big messages though, sometimes 
> it's filtering of the packet because the source isn't valid (1918 router 
> interfaces, to take a simple example)

Yes - so, should this document contain a precis of how to minimize the risk of 
PMTU-D breakage with regards to the IXP fabric and the SP fabric interconnect  
devices?

>                                       customer's router

Good catch!
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