[c-nsp] RSP16 drop-in for RSP4?

[Pete Templin]

Bill Wichers wrote:

> Just a slightly related question: about how many feeds are you able to
> squeeze into an RSP4 w/ 256MB? Right now I have 1 full view and a partial
> (filtered from another of our routers) view on one router and run around

Topology: Two GSR core routers, two GSR upstream edge routers.  Edge 
routers are route reflector clients of the cores but do not receive 
upstream external routes (hot exit, and propagate your entire set of 
routes).  Six 7507s as customer aggregation routers, and are route 
reflector clients of the cores.  Core routers instructed to not reflect 
client routes to clients; all clients are in turn fully meshed (i.e. 
full mesh in the POP; route reflectors tie it all together).

The 7507s receive a full table from each local edge router, and receive 
twin (most of the time) sets of "best route if the core prefers to go 
outside the POP" routes from the local cores.  The 7507s are all running 
12.0(27)S5, and are sitting at 13-22MB of free memory.  Way tighter than 
I'd like to be, and therefore the reason for asking about RSP16s. 
Nonetheless, knock on wood, we are not seeing any instabilities with 
such low amounts of free RAM.

pt