[c-nsp] C2811 / BGP & DRAM reqs

[Alex Campbell]

Do you want to take full tables or just defaults?

256MB is not enough for full tables.  To be comfortable and plan for the
future I would recommend 768MB or 1GB.

The 2800s do not have powerful CPUs.  Depending on features enabled,
packet size etc, pushing 16mbps with full tables on a 2811 could be a
challenge.  When a neighbor flaps the CPU will struggle to process the
BGP updates and throughput on the device will fall dramatically.

I know this is a Cisco list but in my humble opinion you would be better
off with a pair of Juniper J4350s.  They can easily push a couple of
hundred mbps, come out of the box with 4 x GigE interfaces, 1GB RAM, a
very fast CPU, and you don't need to stuff around with feature set
upgrades.  Even with heavily discounted Cisco pricing the J4350 will be
cheaper than a 2811, and you will get much more mileage out of the
Juniper.

 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of jcovini at free.fr
Sent: Monday, 28 May 2007 4:43 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] C2811 / BGP & DRAM reqs

I need to loadbalance using BGP between two ISPs.
The bandwith will be about 16 Mbit/s per ISP.
I was thinking about using a pair of 2811 for this purpose, along with
the SP services  (S28NSPSK9-12406XE, 700$ one) software feature for
running BGP on them.

Do you think the 2811 overally fits for that purpose ? (Especially, is
256MB DRAM enough ? or should I consider upgrading this ?)

cheers
Jerome
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