10G + 1G Modules on 3750 or 3560

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Jul 25th, 2008
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Can either of the switches support both the 10G XenPack and the 1G Fibre Module at the same time?

Also, can either of the switches support 2 x 10G Module at the same time?


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rsabapathee Fri, 07/25/2008 - 01:42
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thx buddy this is what i need

But i cannot see the main differences between the 3560E and 3750E. Can you kindly help clarify


lgijssel Fri, 07/25/2008 - 02:09
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THE main difference is that the 3750 series are stackable switches, i.e. they can be interconnected via a stacking cable with very high throughputs. (bus speed is 32 or 64Gbps)

Also, the stack behaves as one switch which allows for easy redundancy solutions, just terminate one cable on both chassis.

The 3560 series can only be interconnected via their external interfaces (gig-speed)

There are other differences but this is the most significant one.

You should check the datasheets for the rest.



andrew.butterworth Fri, 07/25/2008 - 02:13
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The 3560E and the 3750E are identical apart from the stacking capabilities of the 3750E. On the rear of the 3750E (and other 3750's) are a two StackWise interfaces. These ports allow you to 'stack' together up to 9 3750's to create one logical switch. The 3750 & 3750G have a 32Gbps StackWise bus and the 3750E has a 128Gbps StackWise bus. If you interconnect 'E' and 'non-E' 3750's then the StackWise bus drops down to 32Gbps. As with most things the 32Gbps is actually 2*16Gbps and 128Gbps is 2*64Gbps.




Joseph W. Doherty Fri, 07/25/2008 - 03:03
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My understanding is Stackwise is dual 8 Gbps duplex, and Stackwise Plus is dual 16 Gbps duplex (or "32" and "64".)

See http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps5023/prod_presentation09186a0080161372.pdf slides 62 and 63.

Stackwise Plus also has the "spacial reuse" feature improvement, see slide 69 in prior reference, which allows better usage of ring's bandwidth. (The -E series will also only send traffic to the ring when required, unlike the non -E series which, I believe, sends all traffic to the ring.)

andrew.butterworth Fri, 07/25/2008 - 03:35
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I had to check there but StackWise is definitely 'Marketed' as 32Gbps (2*16Gbps):

'To efficiently load balance the traffic, packets are allocated between two logical counter-rotating paths. Each counter-rotating path supports 16 Gbps in both directions, yielding a traffic total of 32 Gbps bidirectionally'

However it is all a bit smoke and mirrors about how this is actually achieved....



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