7206 NPE-G2 with 4 full table feeds

Łukasz Bromirski lukasz at bromirski.net
Wed Jun 1 22:34:48 UTC 2011

On 2011-06-01 21:09, Eric Morin wrote:
> Hi
> I have an application where I have a 7206 with NPE-G2 (1G RAM) that
> currently has a full table from an eBGP peer and a full table from a
> co-located IBGP peer. I want to mesh this guy to two other IBGP peers
> that will also send their full tables. There is roughly 400Mbps (adding
> both direction) with an OSPF process (<30 routes) and an ISIS process
> (<20 routes).

First of all - [email protected] is a better place to ask such question
and if you search archives of it, you'll find a lot of comments
for such config.

> I haven't been very successful at finding real life BGP scaling for this
> platform and was hoping that someone out there may be doing something
> similar (4 x full table feeds with ~400Mbps) and can provide feedback on
> performance and/or stability. I have soft reconfig inbound enabled on
> the current two feeds, I assume that this will make a difference in this
> application with regards to available memory for all 4 feeds?

With 1GB of RAM you may run short (check current actual usage), but
I'd recommend in such situation to rely rather on the route refresh
standard capability, than the soft reconfig - it eats memory per-peer,
and with route refresh you can get almost the same, trading bandwidth
on the link for RAM in the RP. NPE-G2 can take 2GB of RAM, so if
that's going to stay I'd also recommend upgrading if you're running
short of memory either way. Or upgrade to ASR 1k and move into the
world of hardware-forwarding platforms.

"There's no sense in being precise when |               Łukasz Bromirski
  you don't know what you're talking     |      jid:lbromirski at jabber.org
  about."               John von Neumann |    http://lukasz.bromirski.net

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