Maximum number of fex by nexus 5600

[Jeremy Dubrulle]

Hi, I have found that we can have max 24 FEX by Nexus 5500 with L2 and 8 with L3.

But is it true for Nexus 5624Q ??

Thanks,

[Rick1776]

Looks like the Layer 2 is the same. Don't see anything regarding the Layer 3

Support for up to 48 fabric extenders (Layer 2) with Cisco Nexus 5696Q, and 24 fabric extenders (Layer 2) with Cisco Nexus 5648Q and 5624Q

https://www.cisco.com/c/en/us/products/collateral/switches/nexus-5624q-switch/datasheet-c78-733100.html
https://blogs.cisco.com/datacenter/introducing-nexus-5624q-switch-seamlessly-migration-from-1g-to-10g40g

[Rick1776 · Accepted solution]

This is a more concise webpage

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/verified_scalability/701N11/b_N5600_Verified_Scalability_701N11/b_N6000_Verified_Scalability_700N11_chapter_01.html

[Jeremy Dubrulle]

Thank you Rick1776, so according to the last link, the maximum number of FEX for a L3 deployment is 24 ?

[Rick1776]

No, Layer 3 FEX is not supported only under layer 2.

If you look under the heading
Table 2 Verified Scalability for a Layer 2 Switching and Layer 3 Routing Deployment
There is a bullet point that states "FEXs are verified in the Layer 2 topology"

Table 3 doesn't list FEX support for Layer 3 Interfaces.

[Jeremy Dubrulle]

I know that FEX can't do L3. But for what I know, the number of FEX supported by Nexus 5500 is 24 if the 5500 does only L2 and 8 if it does L3.

So according to this table :

Table 2 Verified Scalability for a Layer 2 Switching and Layer 3 Routing Deployment"

the number of FEX supported for a 5600 is 24 even if the 5600 does L3. Do you agree?

[Rick1776]

Yes I agree with that statement.