Why Sup720 in 6509 NEB-A in slot 5 and 6 ?

Unanswered Question
Mar 2nd, 2007


I have Sup-2 in slot 1 and 2 with active and standby in 6509 NEB-A chassis.

Now, if i replace sup-2 with sup720 i have to put in slot 5 and 6 where i have some line cards.

Can some body help me to understand why sup720 need to be put in slot 5 and 6 , if i'm going to use same chassis ??????

Thanks in advance.



I have this problem too.
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Jon Marshall Fri, 03/02/2007 - 07:49


At the moment your 6500 linecards can only utilise the 32Gbps shared bus. With a Sup 2 you could purchase a Switch Fabric Module which would then allow your linecards (if they were fabric enabled) to access up to 256Gbps on the switch fabric of a 6500.

So if all your linecards were fabric enabled by installing an SFM you could get much greater performance. if you did buy an SFM you have to insert it into slots 5 & 6 on the 6509 chassis because this is where it makes the connections to the switch fabric.

The Supervisor 720 has an intergrated SFM and this is why it needs to go into slots 5 & 6 in the 6509 chassis.




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