Hi;
Yes, you can do it there is no issue.
With reference to Peer-links & peer keepalive-links, each VDC should have there own separate links. Take a example we have 4 VDC on 2 chassis and want to create vPC domain on all 4 VDC then you should have following links:
Peer-links: 2 links (per VDC) * 4 (VDC) = total 8 links.
peer-keepalive: We have 2 option - 1st we required 1 link per vPC domain means total 4 links. 2nd option if we are using management link for peer-keepalive then you can use same link for all 4 VDC.
Thanks & Best regards;