On Fri, 17 Jul 2009, Brad Fleming wrote:
We don't run very much Cisco gear (none of their larger, hardware stuff) but I have a couple questions for the Cisco gurus out there...
According to this page: http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_dat... The Cisco WS-SUP720-3BXL can hold "1,000,000 (IPv4); 500,000 (IPv6)" route entries.
1) Does that mean a) The card can hold 1m IPv4 routes --OR-- 500K IPv6 routes or b) 1m IPv4 routes --AND-- 500K IPv6 routes?
OR. Or you can have 524288 v4 and 262144 v6 routes...or you can move the split around. I chose: L3 Forwarding Resources FIB TCAM usage: Total Used %Used 72 bits (IPv4, MPLS, EoM) 622592 289791 47% 144 bits (IP mcast, IPv6) 212992 8 1% Adjusting the split requires a reboot.
2) I'm assuming MPLS cuts into the number somewhere but could anyone explain it briefly?
I think the above actually does.
3) Do ACLs use some of these resources or do they get their own slice of memory?
Don't think so. I did a blog entry about this a while back. http://jonsblog.lewis.org/2008/02/09#sup720-20080209
That page also reports "up to 40 Gbps per slot of switching capacity; 720 Gbps aggregate bandwidth". Is the 40Gbps per slot an aggregate or full-duplex value?
AFAIK, cisco always reports these things as input+output = bandwidth. It makes the numbers more impressive. We've been using 6509s as BGP routers for years and they've generaly been rock stable. ---------------------------------------------------------------------- Jon Lewis | I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________