[c-nsp] full routing table / provider-class chassis

[Kevin Graham]

> > Was the original intention of this thread not to find out exactly what *is* 
> the best tool for the above scenario? :)
> 
> GSR w/E3 or E5 LCs, ASR 1K, CRS-1, or N7K, depending upon the circumstances 

Probably none of them -- N7K seems squarely targeted at enterprise DC, so given
BU turf wars, wouldn't go near it for a SP workload (ie. consider that post-
split, the 6500 and 7600 are clearly diverging). Otherwise, ASR9K or 7600
are going to be the only ones that get close to the port counts that were cited
initially.

Given the 192 ports of 10/100/1000, presumably this is aggregating customers,
in which case it'd be best to roll these up on 7600/RSP720 (along with their
associated BGP, since most of them would probably be suitable for peer-groups).
uRPF wouldn't be a problem, and hopefully ACL's would be uniform enough across
customers to share most of the ACE entries. 

With that compromise (namely loosing customer-customer netflow detail), the 
remaining requirements for full netflow exports and the balance of the BGP
workload are feasible for any of ASR1k, GSR, or CRS-1.