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_data_sheet09186a0080159856_ps4835_Products_Data_Sheet.html
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 |
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