07-20-2014 11:15 AM - edited 03-07-2019 08:07 PM
All,
It was not clear to me what is the backplane of the switch WS-C3850-24S-E (24 ports). I need to know what is the backplane for layer 2 and layer 3.
Does anyone have this information?
Thank you!
Luciane de Medeiros
Solved! Go to Solution.
07-20-2014 12:50 PM
Hi,
See table-8 in this link. The switch capacity It is by the number of ports and not layer-2/3
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series-switches/data_sheet_c78-720918.html
176 Gbps on 48-port models
92 Gbps on 24-port models
68 Gbps on 12-port model
HTH
07-20-2014 03:23 PM
Hi,
That is correct. On the 3750x series, regardless of the number ports they all have the same capacity which is 160 vs 92 and 176 on the 3850s. On the other hand, the 3850s can work as a wireless controller, but the 3750xs don't have this capability.
HTH
07-20-2014 12:50 PM
Hi,
See table-8 in this link. The switch capacity It is by the number of ports and not layer-2/3
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series-switches/data_sheet_c78-720918.html
176 Gbps on 48-port models
92 Gbps on 24-port models
68 Gbps on 12-port model
HTH
07-20-2014 01:41 PM
Hi Reza,
Thanks for the feedback.
Can I understand that the Cisco 3750X-24 has 160 Gpbs, more performance that the 3850-24 (96 Gbps)?
Luciane de Medeiros
07-20-2014 03:23 PM
Hi,
That is correct. On the 3750x series, regardless of the number ports they all have the same capacity which is 160 vs 92 and 176 on the 3850s. On the other hand, the 3850s can work as a wireless controller, but the 3750xs don't have this capability.
HTH
07-20-2014 04:14 PM
Hi Reza,
All right! Thank you! ;-)
Luciane de Medeiros
07-20-2014 04:29 PM
Glad to help and thanks for the rating.
07-21-2014 04:19 AM
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The 3750 may not have more useful performance, in fact, if you stack them, it may have (much) less (StackWisePlus's 64Gbps vs. StackWise-480).
On some switches, it appears Cisco uses the same fabric in different models, but you only need the bandwidth to support your ports. Both the 3750X and 3850, with 24 gig ports, support dual 10g uplinks. So, total fabric bandwidth needed is (24 + 20) * 2 = 88 Gbps. If the fabric provides that much bandwidth, you're got as much you need (or that you can ever use).
Where the "excess" bandwidth might be needed on these switches is to support the stacking ports. On the 3750X, that would require an additional 64 Gbps. On the 3850, that would require an additional 480 Gbps. (From Cisco specifications, it's unclear whether either switch's stacking ports "counts against fabric bandwidth, as do the other ports.)
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