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

[Hele Du]

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?

[Steve Fuller]

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]

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 ?