[c-nsp] Layer2/3 Question - 6509

Steve Francis sfrancis at fastclick.com
Mon Nov 15 22:35:03 EST 2004


Paul Stewart wrote:

>Hi there..
>
>We have a 6509, 7513, and 3640 (in this particular case).
>
>My question may seem stupid but here goes.  
>
>On the 6509 we have a bunch of servers all connected to GigE ports.
>Between the 6509 and 7513 we have GigE fiber.  Between the 6509 and 3640
>is FE.
>
>The servers are layer2 only on the 6509 with the actual Layer3 handled
>by the 7513.  If data is being transferred from server to server (same
>VLAN, same subnet) does the traffic actually pass *through* the 7513?
>My reason for asking is that we are looking at moving a few VLAN's over
>to subinterfaces on the 3640 but I need GigE speeds between the servers,
>yet only 30 Mb/s out to the "outside world" which would be the 3640
>possibly.
>
>Not sure if that made sense but I just don't want GigE to GigE traffic
>actually passing through a FE interface defeating the purpose....
>  
>
No, the layer2 traffic will all be local to the 6500.

>Thanks,
>
>Paul
>
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