On Sunday, January 12, 2014 04:59:41 AM [email protected] wrote: > The MPLS assumption is that it's protected and checked by > a strong link CRC like Ethernet, and checked/regenerated > by stack processing between hops; here, in a path > context, with zero UDP checksums MPLS has no checking at > all.
Right, which is probably why routers today can count badly checksum'ed Ethernet frames, but don't have the equivalent for MPLS. > I'm sorry, when was MPLS cheap? Current-generation ASIC's have no problem forwarding MPLS frames at wire rate. One could go so far as to say that MPLS has allowed vendors to make cheaper line cards also because IP FIB's and traffic queues can be scaled down dramatically (not that I'd every buy such line cards, but...). Mark.
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