FEX Limit on Nexus 7000 M1 Module

Unanswered Question
Nov 21st, 2011

I know that there is a limit of 32 FEX per Nexus 7000 but what is the FEX limit on a single M1 line card?

I have this problem too.
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Jerry Ye Mon, 11/21/2011 - 18:43

It follows the system limit, 32.

If you do the math, this comes down to 32 N2232 per N7K which will 32 x 32 10GE ports = 1024 10GE.

HTH,

jerry

lotfi.bouhaddad Wed, 04/18/2012 - 01:21

There is another limitation concerning number of Vlan Range used toward the FEX

There is a fixed programable table with a max of 450.000 entries and the allocation is done not by active vlan on the trunk but on the range of vlan

Examples:

  • FEX used 2248, 48 ports.

VLAN range 10-3000 = 2990 entries

For 1 FEX, we will use 2990*48 = 143520 entries

We can use only 3 FEX on this card.

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