Communication Problem between switches

[sikest]

I have a Nexus 7K and I have a need to connect it layer 2 to a 3850. I have only 1 vlan that needs to be set up to communicate from servers attached to the 3850 to servers that live in our UCS environment that live off of the 7K's. just looking to see if there are any interoperability problems, and maybe a white paper on how to correctly do this.

[Flavio Miranda]

If you intend to do this with Trunk ports or Port-channel I can not see any interoperability problem as both support widely this protocol. 

For port channel you need to make sure both are using the same mode or leave it auto. 

[balaji.bandi]

You want single 3850 connected 1 nexus or 2 nexus 7K ? if they are 2 nexus 7K then you need to configure vPC

https://www.balajibandi.com/?s=vpc

[sikest]

I have 2 Nexus 7K's as my Aggregation layer and 2 3850's. so Do I set vpc on the Nexus side and a port channel on the 3850 side? or just a trunk on the 3850 with the vlan allowed?  

[balaji.bandi]

3850 Stack ? Nexus side vPC, 3850 Stack side Port-channel should work for you.

[sikest]

The 3850's are not stacked. They are in 2 separate locations in the building.

[Reza Sharifi]

Physical connectivity should not be an issue especially if you are only using one link. if you will be utilizing more than one link use a Portchannel. Also, if you are extending only one vlan (vlan1) you can simply keep the link as access. If you think you will be adding more than one vlan, it is a good idea to trunk it now, so there is no future outage to convert the link from access to trunk. Also, if the 7k is currently the root bridge, make sure to keep it the same.

HTH