2960-S FlexStack module bandwidth?

emresumengen · ‎07-24-2013

Hi all,

I'm mixed up about the information I find online, about the bandwidth/throughput supported by the FlexStack module.

The datasheet and the whitepaper about the module states that each connection provides 10Gbps of Full Duplex throughput.

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/white_paper_c11-578928.html

But, the Cisco Switch Guide says (interestingly) that FlexStack module provides each switch with 40Gbps of throughput...

http://www.cisco.com/en/US/prod/switches/ps5718/ps708/networking_solutions_products_genericcontent0900aecd805f0955.pdf

So, as long as there are only 2 ports on the module, I guess the right capacity would be 20Gbps, as opposed to the information on the Switch Guide... Right?

Emre

paolo bevilacqua · ‎07-24-2013

There is no contradiction. FlexStack is actually a dual-port 10 Gbps full duplex module. 10 x 4 = 40 Gbps total throughput per module. Same as saying, 20 Gpbs full-duplex .

emresumengen · ‎07-24-2013

Well, at least clearing that out is fine... But, honestly, presenting full-duplex as "twice bandwidth" is nothing but marketing nonsense...

If it was true, those stack links should also be capable of doing 40gbps half-duplex, but they can't.

Anyways, thanks.

Leo Laohoo · ‎07-24-2013

But, honestly, presenting full-duplex as "twice bandwidth" is nothing but marketing nonsense...

Data sheet were written by the marketing folks. They don't know any better.

If it was true, those stack links should also be capable of doing 40gbps half-duplex, but they can't.

Yes, it can only do 10 Gbps full duplex and nothing more than that.

emresumengen · ‎07-24-2013

Well said :)

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