[c-nsp] 7505, OC3s and BGP

[Denny Reiter]

On Wed, Jul 20, 2005 at 04:48:11PM -0400, Jon Lewis wrote:
> 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.


The OC3 to the upstream is bumping up against the ceiling and I am
seeing some cells get dropped, hence the second upstream.  And
yikes!  That VIP is sitting at 70% processor utilization right now.
The OC3 to the customers and other locations is doing alright
overall, and the processor on it is around 40-45%.  There is no BGP
at all at the present time, so I don't have to worry about flaps
yet (haven't missed that) and the RSP4 barely breaks 3% processor
utilization.

So, I was thinking skipping the RSP upgrade and just upgrade the
VIPs.  Is there that much of an improvement going to a VIP4-80
instead of a VIP4-50?

Thanks,

Denny

-- 
Denny Reiter                               denny at reiters.org
So I don't hurt your feelings:        happydenny at reiters.org
		Command failed:  Do you know what you're doing?