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How does switching capacity of Nexus 7710 and Nexus 7718 calculate?

Unanswered Question
Aug 6th, 2013
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Hi everybody.


I found the nexus 7700 Fabric datasheet there was 220G per slot.


For example, the nexus 7710.


There was 220G per slot per fabric module and result is 6*220G*8=10560G, duplex is  21120G=21T.


How does the 42T came from?

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Steve Fuller Tue, 08/06/2013 - 10:07
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Hi,


The 42 Tbps number Cisco are quoting is for the Nexus 7718 platform. If you look at the Cisco Nexus 7700 Switches Data Sheet you'll see it quotes:

The Cisco Nexus 7710 has six fabric module slots to provide simultaneously active fabric channels to each of the I/O and supervisor modules. Through the parallel forwarding fabric architecture, the Cisco Nexus 7710 can achieve 21 Tbps of forwarding capacity or more.


And for the Nexus 7718:

The Cisco Nexus 7700 18-Slot Switch has six fabric module slots to provide simultaneously active fabric channels to each of the I/O and supervisor modules. Through the parallel forwarding fabric architecture, the Cisco Nexus 7700 18-Slot Switch can achieve 42 Tbps of forwarding capacity or more.

So for the Nexus 7718 platform we have 220 Gbps * 6 Fabric Modules * 16 I/O slots totaling 21,120 Gbps. If we double that for full duplex we'll have 42,240 Gbps or 42 Tbps.


Regards

Hele Du Tue, 08/06/2013 - 18:21
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Hi Steve,


Thank you for you answer.


I saw in compare model page, there was 42T for 7710 and 83T for 7718.




Cisco Nexus 7700 10-Slot Switch

Cisco Nexus 7700 18-Slot Switch


42 Tbps

83 Tbps




Is that just in Roadmap ?

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