There isn’t really anything super special about it if you know about the memory
space on the Jericho chipset and the LPM/EPM tables. Cisco is doing relatively
the same things with their 5502 platform, it supports 1M FIB entries in the
base memory model. Most of it banks on the fact the bulk of the table is made
up of /24 prefixes, and where it doesn’t optimization techniques can be done to
make them /24s.
Thanks,
Phil
-----Original Message-----
From: NANOG <nanog-bounces+bedard.phil=gmail....@nanog.org> on behalf of Tyler
Conrad <ty...@tgconrad.com>
Date: Friday, April 14, 2017 at 13:25
To: David Hubbard <dhubb...@dino.hostasaurus.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Subject: Re: Anyone using Arista 7280R as edge router?
I've deployed a 7280SR in that role. Needs the FLX model/license, and a
special TCAM optimization command to install all the routes in hardware.
Right now, just pulling a single v4 feed, expanding to a second soon; no v6
yet. Overall, no major issues with it, but Arista seems to be pretty
close-lipped about the secret sauce in Flexroute that lets it scale over 1M.
On Fri, Apr 14, 2017 at 6:51 AM, David Hubbard <
dhubb...@dino.hostasaurus.com> wrote:
> Hey all, have some Brocade MLXe’s that can no longer handle a full v4 and
> v6 route table while also having VRF support (dumb CAM profile limitations
> in the software). Mine don’t do anything fancy; just BGP to a few
upstream
> peers and OSPF/OSPFv3 to the inside, management VRF, some ACL’s. I’m
> looking at the ASR9001 with add-on ports since I need (10) 10gig.
However,
> I’ve also been running some Arista 7280SE’s for the past 18 months with no
> issues, and they want me to consider their 7280R since it would give me
> more ports, in addition to some higher speed ports, which would be nice if
> I ever want to upgrade some of our peering to 40 or 100gig.
>
> Arista’s specs say the 7500R / 7280R can handle 1M ipv4+ipv6 routes in
> hardware (FIB):
>
> https://www.arista.com/assets/data/pdf/Whitepapers/FlexRoute-WP.pdf
>
> In theory, it would last at least a few years if the v4 table doesn’t get
> too crazy between now and then.
>
> Curious if anyone has deployed a 7500R or 7280R in this role and what the
> feedback has been?
>
> The 9001’s 4M ‘credits’ for the combo of v4 +(2)v6 routes obviously goes
> much further, but I think either one would make it to their expected end
of
> life, or if not on the Arista side, I’d probably have spent half as much.
>
> Thanks,
>
> David
>
