Joseph

3750-E datasheet states that switching fabric capacity is 160Gbps which would mean based on your figures that the 3750-E 48 gig port switch is not oversubscribed ?

Jon

Jon, if 3750-E does have 160-Gbps fabric bandwidth, it wouldn't be oversubscribed. However, if you search Cisco's site, you'll find other documentation that notes the 3560-E/3750-E fabric bandwidth is 128 Gbps. (More fun, Cisco's switch guide notes fabric as 64 Gbps.)

Since some documentation lists switch as wire rate capable, I would lean toward a fabric of 160 Gbps.

Guys,

So we sometime need to find the correct document outside cisco world. J/K (grin)

Toshi

Or, we take all the different figures, add them up and divide by the number of figures to get an average :-)

Yes, had this problem before with conflicting documentation on the 6500 switches.

I think 64Gbps is the connection between 3750-E switches in a stack rather than the actual switch fabric per switch so you could argue in a stack it is definitely not wire rate if all ports in one switch were talking to all ports in another switch in the same stack.

As fo 128Gbps - pass, i haven't a clue where that figure comes from :-)

Jon

Jon,

I have to agree with you on what we have to to do is "Average".

5P! I love that clue. (grin)

Toshi

128 Gbps, see attachments.

64 Gbps fabric, see http://www.cisco.com/en/US/prod/switches/ps5718/ps708/networking_solutions_products_genericcontent0900aecd805f0955.pdf, pages 108 and 109.

BTW, so far I've only found the 160 Gbps reference with regard to the 3750-E. I wonder if this is some additional bandwidth for Stackwise+, although its only an additional 32 Gbps not 64 Gbps.

Thank you all very much.