[c-nsp] Upgrading to newer hardware from 7606..

[Howard Leadmon]

  I know it's long in the tooth, but the 7606 with RSP720's we have in 
service still to this day has really done a nice job overall, not the 
fastest, but it's survived and just stays up.

  That said, looking at the current routing table and expected growth, 
it's looking like I need to plan for more routes than are possible in 
the 7600 chassis.   Looking at the current tables I am seeing about 740k 
IPv4 routes, and about 65K IPv6 routes, and know even with TCAM 
optimized on the RSP720's they top out at just over 800K routes, even 
going to a SUP-2T doesn't really save the day.

  I know I have followed discussions further back in this group, but 
haven't seen much for a bit, and I am just wondering where people are 
now days on recommendations for a router to handle the current tables, 
and to plan for the future for a bit.  I saw at one point the ASR9001 
looked like a nice option, but it looks like it's 32bit, and that could 
be an issue going forward with updates.   I also see the ASR1000 
routers, something like the 1006 could be used and even support 
redundant RP's and ESP's, and if I am reading it right would be good out 
to about 4M routes (that should last a while).

  I need to have at least 4x 10GE interfaces in the router, as we have a 
few upstream links that are all at 10GE,  and a few GE links, plus of 
course the links back into our switches.   I haven't really used any 
DS1/DS3 type connections in years, so figure we are pretty much Ethernet 
only at this point in the game.

  So I am sure there are various opinions, but before I go out looking 
around in the used marketplace, I wanted to see what people felt might 
be a good direction to look before I run out of TCAM in the current router.

  As always, thanks for the input...

  
---
Howard Leadmon
PBW Communications, LLC
http://www.pbwcomm.com