[c-nsp] GigE Edge router

[Arie Vayner]

Hi

If something like 10 GigE ports are enough, I would consider upgrading
the NPE to NPE-G1, and then buying the most simple L2 switch with GigE
ports (like a 3550-12G/T or it's equivalents).
The idea is to connect a trunk between the switch and the router, and
connect the clients to the switch.
On the switch open a L2 vlan per client, while configuring all the IP
and BGP stuff on the router (a sub-if per client)

This would enable you to have all the features you can just imagine,
because the 7200 supports everything, and you would have a relatively
high density GigE aggregation "device".
You can actually off load some of the features to the switch, in order
to save some performance on the NPE-G1, getting even more performance
out of it. I am thinking about things like ACLs, QoS/Policing on the
switch and things like uRPF/BGP on the router.

Arie

On 5/31/05, Paul Connally <paul.connally at gmail.com> wrote:
> On 5/31/05, sthaug at nethelp.no <sthaug at nethelp.no> wrote:
> >
> > Depends on what kind of performance is desired, and what kind of
> > limitations you can live with.
> >
> > NPE-G1 was $15000 list price last time I checked, while a 3560 EMI with
> > 4 SFP ports and 24 10/100/1000T ports is $8800. The 3560 (and similarly
> > 3550, 3750, 4500) give you *much* higher performance, *if* you can live
> > with the limitations. The limitations are significant, e.g.
> >
> > - You're nowhere near being able to accept a full Internet routing
> > table.
> 
> Probably should have specified; a full unicast BGP table (from
> multiple providers) IS required.  For various reasons, default or
> provider-only routes are not an option.
> 
> We also are running multicast BGP to one provider, possible another in
> the future.
> 
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