nanog mailing list archives

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


From: Christopher Morrow <morrowc.lists () gmail com>
Date: Fri, 2 Dec 2016 10:29:56 -0500

On Fri, Dec 2, 2016 at 9:32 AM, Job Snijders <job () instituut net> 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
ever?


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