[c-nsp] 7200 for BGP

[Pavel Skovajsa]

hi R.

The G2 will certainly handle it, but I would look into the reason for having
75%, that sounds really bad.

For the G1 and NPE400, I'd say you definitely need more memory - 512 MB or
1G to be fine.

This is what Cisco says:
The amount of memory required to store BGP routes depends on many factors,
such as the router, the number of alternate paths available, route
dampening, community, the number of maximum paths configured, BGP
attributes, and VPN configurations. Without knowledge of these parameters it
is difficult to calculate the amount of memory required to store a certain
number of BGP routes. Cisco typically recommends a minimum of 512 MB of RAM
in the router to store a complete global BGP routing table from one BGP
peer. However, it is important to understand ways to reduce memory
consumption and achieve optimal routing without the need to receive the
complete Internet routing table.

See this document for the details about the memory consumpsion -
http://www.cisco.com/en/US/customer/tech/tk365/technologies_tech_note09186a0080094a83.shtml

The rule of thumb is 1k of prefixes = 1M of RAM, but this is too generic and
little conservative.




On Tue, Dec 15, 2009 at 1:19 PM, RAZAFINDRATSIFA Rivo Tahina <
r.tahina at moov.mg> wrote:

> Hi all,
>
> I use the 3 7200 to connect to upstreams
>
> Cisco 7206VXR (NPE-G1) processor (revision B) with 229376K/32768K bytes of
> memory.
>
> Max CPU usage:28%
>
> Cisco 7204VXR (NPE-G2) processor (revision A) with 917504K/65536K bytes of
> memory.
> Max CPU usage: 75%
>
> Cisco 7206VXR (NPE400) processor (revision A) with 229376K/32768K bytes of
> memory.
> Max CPU usage: 45%
>
> BGP is used with upstreams but I don't receive full BGP table.
>
> Do these boxes have enough resources to handle the full BGP table?
>
> Regards.
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