Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue)

Christopher Morrow morrowc.lists at
Fri Dec 2 15:29:56 UTC 2016

On Fri, Dec 2, 2016 at 9:32 AM, Job Snijders <job at> wrote:

> Dear Vendors, take this issue more serious. Realise that for operators
> these issues are _extremely_ hard to debug, this is an expensive time
> sink. Some of these issues are only visible under very specific, rare
> circumstances, much like chasing phantoms. So take every vague report of
> "mysterious" packetloss, or packet reordering at face value and
> immediately dispatch smart people to delve into whether your software or
> hardware makes wrong assumptions based on encountering a 4 or a 6
> somewhere in the frame.

you'd think standard testing of traffic through the asic path somewhere
between 'let's design an asic!' and 'here's your board ms customer!'  would
have found this sort of thing, no? or does testing only use 1 mac address

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