02-06-2017 02:31 PM - edited 03-08-2019 09:13 AM
Hello,
I'm getting ready to migrate two 6509-E to VSS, each chassis has the following line cards and daughter cards:
Router>sho mod
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 20 DCEF2T 4 port 40GE / 16 port 10GE C6800-16P10G SAL204802JT
2 20 DCEF2T 4 port 40GE / 16 port 10GE C6800-16P10G SAL204702L0
3 20 DCEF2T 4 port 40GE / 16 port 10GE C6800-16P10G SAL204905AL
6 5 Supervisor Engine 2T 10GE w/ CTS (Acti VS-SUP2T-10G SAL202900NU
7 24 CEF720 24 port 1000mb SFP WS-X6724-SFP SAL12351Y57
Mod Sub-Module Model Serial Hw Status
---- --------------------------- ------------------ ----------- ------- -------
1 Distributed Forwarding Card C6800-DFC SAL204802JT 1.2 Ok
2 Distributed Forwarding Card C6800-DFC SAL204702L0 1.2 Ok
3 Distributed Forwarding Card C6800-DFC SAL204905AL 1.2 Ok
6 Policy Feature Card 4 VS-F6K-PFC4 SAL202601AH 3.0 Ok
6 CPU Daughterboard VS-F6K-MSFC5 SAL202900EV 3.1 Ok
7 Centralized Forwarding Card WS-F6700-CFC SAL12372XVF 4.1 Ok
I'd like to know what impact the WS-F6700-CFC will have on forwarding performance given that the other line cards have the C6800-DFC?
Thanks
Solved! Go to Solution.
02-06-2017 03:14 PM
Hi,
There should not be a major performance impact.
Here is a good doc explaining the difference.
https://supportforums.cisco.com/document/85621/understanding-msfc-pfc-and-dfc-roles-catalyst-6500-series-switch#Centralized_Forwarding_Card_CFC
HTH
02-06-2017 03:14 PM
Hi,
There should not be a major performance impact.
Here is a good doc explaining the difference.
https://supportforums.cisco.com/document/85621/understanding-msfc-pfc-and-dfc-roles-catalyst-6500-series-switch#Centralized_Forwarding_Card_CFC
HTH
02-06-2017 07:50 PM
Thanks for that Reza, but does this also apply to the performance while running this card, with CFC, in VSS mode with the other cards that have DFC4? I don't see any explanation related to VSS.
02-07-2017 06:19 AM
There's really no special performance consideration related to VSS.
All VSS buys you, from a performance standpoint, is, ideally, half you traffic is processed by each VSS member, so, in theory, VSS can offer twice the performance of a non-VSS individual platform.
Ingress traffic on your non-DFC line card will be processed by your sup. Your sup2T is rated at (I recall) 60 Mpps. As your other line cards have DFCs, all your sup's PSS can be devoted to your one non-DFC line card (and its own 10g ports). (BTW, minimum size Ethernet requires about 1.5 Mpps per gig, so your 24 gig port card could require up to about 36 Mpps.)
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