Thermos Saamnet wrote:
Thanks, Peter. The URL you referred has answered up a lot of my questions :)
On Fri, Jan 23, 2009 at 1:35 PM, Peter Rathlev <[email protected]> wrote:
On Fri, 2009-01-23 at 10:31 +0100, Mikael Abrahamsson wrote:
On Fri, 23 Jan 2009, Thermos Saamnet wrote:
I, however have limited experience with them and one of the foremost
questions in my mind was what's the difference between a Route Switch
Processor and a Supervisor Engine.
<
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_white_paper0900aecd80673385.html
describes pretty well the different parts of the 6500/7600 platform when
it comes to what does what in it.
That's a very nice document. :-) (Hadn't seen it before.)
However, it doesn't really explain what the RSP720 is, as far as I can
see. This link explains the features of RSP720, SUP720 and SUP32:
http://www.cisco.com/en/US/docs/routers/7600/Hardware/Hardware_Guides/Supervisor_Engine_and_Route_Switch_Processor_Guide/SupE02_external_docbase_0900e4b18075083b_4container_external_docbase_0900e4b1807b6700.html
http://tinyurl.com/al4ue9
This phrase from the document puts it well:
"The route switch processor is the newest version of supervisor engine."
The RSP720 is "just" a faster processor, newer (better/more
features/less stable?) MSFC (the "router" part) and a slightly enhanced
Policy Feature Card (PFC3C) compared to the Sup720-3B(XL).
I would just point out the 3C is 'better' than the 3BXL, BUT, I
understand TCAM sizes are still bigger in the XL :-), it may be
obvious, but some people may still get caught with the full-routes trap.
As recent thread here (and some not so recent ones):
"Note A high-capacity (XL) PFC is also available. The XL version
(PFC3BXL or PFC3CXL) provides more memory for more routing table and
netflow cache capacity than a PFC. It allows routing and forwarding
processes to be offloaded from the supervisor engine or RSP to the PFC,
thus increasing the performance of the supervisor engine or RSP. "
may give the wrong impression that a non-XL would in fact work, in cases
where it the FIB limit would bite the hand that feed it :-)..
And the RSP720 is prettier. :-)
Regards,
Peter
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