[c-nsp] 7505, OC3s and BGP

[Jon Lewis]

On Wed, 20 Jul 2005, Denny Reiter wrote:

> I'm going to be adding a third OC3 to go to a second upstream.  What
> would my best options for upgrades be?  I'm thinking replacing the
> VIP2-50s with VIP4-80s, or at least one of them, and having two of
> the OC3s in the vip4-80.  Would VIP4-50s be sufficient?  Also, is
> there any need to upgrade the RSP4 to an RSP8?

Whats your OC3 traffic look like?  What sort of CPU utilization are you
seeing on the VIPs?  Assuming you're using dCEF, the RSP probably isn't
being worked that hard other than during BGP flaps.  Assuming that's the
case, I think the only benefits you'd get from an RSP8 upgrade are ECC
memory for the RSP and much more MEMD buffers for the VIPs to place
packets in when they switch packets between each other.

If you do get better VIPs, use them for the interfaces that receive the
most PPS.

----------------------------------------------------------------------
 Jon Lewis                   |  I route
 Senior Network Engineer     |  therefore you are
 Atlantic Net                |
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