Hi Steven, I would highly recommend using another link that is separate point to point connection between N7K's for routing, although it will work with SVI's on the N7K's via the Peer link. It just depends if you have spare ports to use for routing - I prefer using separate L3 interface for routing, a matter of preference. Having said this there are some scenario's where this is not supported depending on configuration and set-up.
If you do take the latter option of using SVI's over the peer link, then please use ospf network type to be point-to-point with /30. It is totally supported by Cisco.
Attach external routers or L3 switches with L3 routed interfaces.
It’s OK to use the vPC peer-link to form a routing adjacency between the two Nexus 7000′s. Use a VLAN dedicated to the routing adjacency and only forward this VLAN on the peer-link, not on the vPC member ports.
Use the ‘passive-interface default’ command in your routing protocol to prevent a routing adjacency on all the other VLANs.
If attaching external devices on a Layer 2 port running a routing protocol with the Nexus 7000′s (e.g. firewall running OSPF), provision a new non-vPC inter-switch link, and attach the device to non-vPC VLANs.
Use static routes to the HSRP gateway address on external devices such as firewalls and load balancers. Do not run routing protocols on these devices unless absolutely necessary.
If you have point-to-point adjacencies then you should have no problem at all.
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