NEXUS VPC

Multi Chassis Port-Channel
2 active control planes
2 active configuration
CFS- Cisco Fabric Services- Used for Synchronization, MAC address advertisement ARP forwarding, State synchronization and configuration validation
Peer-Link- Link between the pairs (Port-Channel)
- Layer 2 traffic, BPDUs(Only Primary will send on VPC links), on orphan ports Secondary will send BPDU
- Runs STP, but not block any ports
Primary and Secondary (Priority+MAC)- lower is better, if any misconfiguration or issue Secondary will always suspend its ports
Keepalive Link- Hello from one VPC Peer to another Peer using IP(default Management Interface), Messages sent 2 sec, 3 sec hold timeout
VPC Member Port- port in VPC
Orphan Port- Not VPC port

Required
2 Nexus devices- 5k or 7k
One VPC domain and Two VPC peers
Need to match on hardware, should be identical

peer-gateway: - VMAC, VIP + Phy MAC
peer-switch:- both primary and secondary VPC peer will send the BPDU

# feature VPC
# vpc domain 99
# role priority 1
peer-keepalive destination 12.1.1.1

#int e1/5-6
channel-group 99 mode active

#int po99
switchport mode trunk
vpc peer-link
Spanning-tree bridge assurance in auto enabled and also jumbo frames

#show vpc role
#show vpc consistency-parameters global

Configure interface in VPC
#int e1/13
channel-group 13 mode on

#int po13
switchport mode fex-febric
fex associate 113
vpc 13