Brocade SLX Internet Edge
blake at ispn.net
Thu Nov 1 18:55:38 UTC 2018
Chris Welti wrote on 11/1/2018 10:03 AM:
> Nicolas Fevrier has a very detailed blog post on how Cisco handles the prefixes on their Broadcom Jericho based NCS 5500 gear.
> I'm pretty sure the principle is more or less the same for the Jericho based platforms on Arista and Extreme.
> Best regards,
I love the nitty gritty detail in this author's post and I'm glad he
concludes by stating clearly that while the base card (spec sheet says:
"On-chip tables for 256K IPv4 or 64K IPv6 routes" and "On-chip tables
for 786K IPv4 host routes, MAC, and labels") can actually hold a full
BGP table today when configured appropriately, Cisco still recommends
the scale cards for that application (spec sheet says: "FIB scale up 2M
IPv4 or 512K IPv6 routes" and "On-chip tables for 786K IPv4 host routes,
MAC, and labels").
I do have to wonder about the internal expansion of each /23 route into
two /24 routes in their FIB algorithm, as I would have thought Cisco
would have attempted to go the opposite way, but I'm sure Cisco has
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