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ar
New Member

Nexus 7K and 5K Double-sided VPC Config

double-sided.jpg

Hi.

Can anyone share config for optimal double-sided VPC?

It is noted in the documentaiton to keep the 5K switches' uplink ports to 7K on the same portchannel groups.

6 REPLIES
Cisco Employee

Nexus 7K and 5K Double-sided VPC Config

Keeping the N5K and N7K in the same PO group number is just for ease of management.

Assuming you are set up unique vpc domain between N7Ks and N5Ks already.

On both N7K and N5K

interface x/x

  channel-group x mode active

interface po x

  switchport

  switchport mode trunk

  switchport trunk allowed vlan x-y

  vpc x

HTH,

jerry

ar
New Member

Nexus 7K and 5K Double-sided VPC Config

Thanks.

The cisco documentation explanation however is not just for ease of management.

It is to avoid "single vpc blocking".

I am a little confused with double-sided vpc.

Please confirm.

Does double sided vpc means:

- 7K portchannel to 5K is configured for vpc;

- 5K portchannel to 7K is configured also fof vpc?

What about if i have 5K to 2K vpc configured as well?

My actual network is 2xN2K is dual homed to 2xN5K. Then 2xN5K is dual-homed to 2x7K.

Cisco Employee

Nexus 7K and 5K Double-sided VPC Config

Does double sided vpc means:

- 7K portchannel to 5K is configured for vpc;

- 5K portchannel to 7K is configured also fof vpc?

Yes.

What about if i have 5K to 2K vpc configured as well?

You need to configure the PO on the N5K as vPC (of course, with a new PO number and vPC number). You will not be able to enter any command on the N2Ks.

interface y/y

  channel-group yyy

interface po yyy

  switchport mode fex

  fex association yyy

  vpc yyy

HTH,

jerry

ar
New Member

Nexus 7K and 5K Double-sided VPC Config

Is there a need for a new VPC domain for 5K to 2K vPC?

I guess not...not sure though..

Do you have a complete reference config for this?

I am also planning HSRP at the aggregationg layer......

Then Aggregation layer to Core will run any dynanic routing protocol....

thanks

Cisco Employee

Nexus 7K and 5K Double-sided VPC Config

The FEX is not a switch, it is part of the N5K and you can only have 1 vpc domain defined in a global configuration mode.

Please take a look at this link, this is a good place to start for all recommended commands:

www.cisco.com/en/US/docs/switches/datacenter/sw/design/vpc_design/vpc_best_practices_design_guide.pdf

HTH,

jerry

ar
New Member

Nexus 7K and 5K Double-sided VPC Config

thanks much

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