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2960-S FlexStack module bandwidth?

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Jul 24th, 2013
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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

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paolo bevilacqua Wed, 07/24/2013 - 02:39
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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 Wed, 07/24/2013 - 04:02
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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 Wed, 07/24/2013 - 05:16
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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.

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