I have a simple question that I can not find a direct answer to. In a stand alone configuration does the 3750 E have a faster backplane than the 3750? The 3750 has a 32 Gb/s backplane which for a 48 port switch is oversubscribed. what is the (non stacked) backplane of a 3750 E.
Please don't reply that I should use the 3560 in such a situation.
Please check out this link:
Cisco Catalyst 3750-E Series Key Features
â¢ StackWise Plus for ease of use and resiliency with up to 64 Gbps of throughput
Edit : Sorry I missed reading the whole question.
160-Gbps wire rate, nonblocking switching fabric capacity
3750-E (and 3650-E) backplane's bandwidth is also documented at 128 Gbps. (Also 48 port models are rated at 101.2 Mpps.)
BTW, non-oversubscribed would require 136 Gbps for 48 gig ports and dual 10 gig (as found on the 4948-10GE).
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, 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.
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 :-)
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.