Nexus Design

[goudier2001]

Is it possible to use x3 N5k's instead of x2 as per Cisco design guides.

N5k1 ---------N5k2-------------N5k3


N2k1 N2k2 N2k3 N2k4

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[Steve Fuller]

Not sure I understand what you're trying to do here as there's very little information as to how you're trying to connect things.

What you have shown is a dotted line between the three Nexus 5k. If you're thinking of doing anything with vPC, then three devices is not supported. There can only be two devices form a vPC domain.

Why do you want three N5k?

Regards

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[goudier2001]

Hi

We will have about 12 to 14 2248's that will be dual homed and was wondering if we could split them over x3 5532's instead of two. But I think you have answered this.

Thanks

[Steve Fuller]

Hi,

Definitely not. The FEX can only be straight-through (single attached) to one N5K or dual-homed to a pair of N5K configured in a vPC domain.

If you think of the FEX as the remote line card of a switch, single attached is like a switch with a single supervisor, and dual-homed is like connecting to a switch with dual supervisor. There's no concept of three supervisors in a switch

Regards