On 11/01/2005 18:38, Arnold Nipper wrote:
On 11.01.2005 18:33 Ryan O'Connell wrote
A while ago, there was a discussion on here about the differences in
architecture between the various WS-X6x48-GE-TX modules and the
resulting maximum throughput of those cards. Unfortunately, although
I meant to keep a copy I appear to have deleted it and I can't find a
reference on www.cisco.com.
So, can anyone confirm/deny my recollection that the WS-X6148-GE-TX
and WS-X6548-GE-TX are both limited to 6Gb/s (6 groups of 8 ports,
each on an ASIC with a 1Gb/s connection to the backplane) and the
WS-X6748-GE-TX is required for full line-rate on all ports? (This is
with a Sup720, no other daughter cards etc)
(I assume the architecture is similar within a card "family", so the
WS-X6516A-GBIC will have the same total throughput as a WS-X6548-GE-TX)
Have a look at
http://www.cisco.com/en/US/products/hw/switches/ps708/products_data_sheet0900aecd8017376e.html.
This URL has comprehensive informations about all 10/100- &
10/100/1000-MPBS Ethernet Interface Modules (three klicks on cisco.com
;-))
Unfortunately, it's not particularly detailed in terms of architecture -
it repeatedly implies the classic cards are 32Gb/s for example, meaning
the whole system, and only in passing mentions the cards themselves are
8:1 oversubscribed.
The manner in which they're oversubscribed is important too - if I know
ports 1-6 are on the same 1Gb/s connection to the bus, I'll avoid
putting, say, uplinks on port 1 and then high bandwidth devices on ports
2 and 3, which I might otherwise do on something like a 3500 or 2900
series)
http://www.cisco.com/en/US/products/hw/switches/ps708/products_data_sheet0900aecd801459a7.html
mentions that the WS-X6516A-GBIC has one 8-Gbps full-duplex connection
to the switch fabric, but doesn't say if the full bandwidth is available
on all possible combinations of ports.
I'm not losing my mind, no I'm not changing my lines,
I'm just learning new things with the passage of time
4 messages in net.nether.puck.cisco-nsp[c-nsp] WS-X6x48-GE-TX architecture
