Extend Nexus9k switches to Nexus3k

[Paul Bedorf]

Hi All, we have a pair of Nexus9k switches set up in a single domain. Im running out of ports and still have lots of other hardware that i need to set up but not enough ports. I have another pair of Cisco Nexus3k switches..... I want to add them to the existing Nexus9k switches, preferably in Layer2 and let the Nexus9k do the routing etc.... whats the best way of doing this... should i create a separate domain for the nexus3k switches and trunk them to the nexus9k switch? or should i keep both nexus3k switches separate ( stand alone, no domain ) and hook them up to nexus9k?

Any help if appreciated. Thank you

[Reza Sharifi]

Hi,

I would just create a separate domain and put the 3Ks in another VPC and then connect the 2 sets together.

HTH

[Paul Bedorf]

Hi Reza, Thanks for your reply. Which option would you suggest as per the picture below?

[Reza Sharifi · Accepted solution]

Hi Paul,

I would prefer option-2. Also, for more info, see figure-9 in this link:

https://www.cisco.com/c/dam/en/us/td/docs/switches/datacenter/sw/design/vpc_design/vpc_best_practices_design_guide.pdf

HTH

[Paul Bedorf]

Thanks Reza for the link
I also had this confirmed with a long colleague of mine, so the final set up will look like this:

So on each switch I will have to create a PortChannel10, make ports member of this Po10 and also make Po10 a member of VPC10 on each switch.
Thank you for all your help and hopefully this setup will benefit anyone else in the future. Cheers