拓扑：
配置：
N9K-1:
vlan 1-500
vrf context APP
vrf context CTRIX
vrf context DB
vrf context Keep_alive
vrf context VM
vrf context management
vpc domain 1000
peer-switch
role priority 65535
peer-keepalive destination 172.16.1.2 source 172.16.1.1 vrf Keep_alive
auto-recovery
interface Vlan1
interface Vlan10
no shutdown
vrf member VM
ip address 10.10.1.251/24
hsrp 10
ip 10.10.1.254
hsrp 20
preempt
priority 110
interface Vlan20
no shutdown
vrf member VM
ip address 10.10.2.251/24
hsrp 20
preempt
priority 110
ip 10.10.2.254
interface Vlan30
no shutdown
vrf member APP
ip address 10.10.3.251/24
hsrp 30
preempt
priority 110
ip 10.10.3.254
interface Vlan40
no shutdown
vrf member APP
ip address 10.10.4.251/24
hsrp 40
preempt
priority 110
ip 10.10.4.254
interface Vlan50
no shutdown
vrf member CTRIX
ip address 10.10.5.251/24
hsrp 50
preempt
priority 110
ip 10.10.5.254
interface Vlan60
no shutdown
vrf member CTRIX
ip address 10.10.6.251/24
hsrp 60
preempt
priority 110
ip 10.10.6.254
interface Vlan70
no shutdown
vrf member DB
ip address 10.10.7.251/24
hsrp 70
preempt
priority 110
ip 10.10.7.254
interface Vlan80
no shutdown
vrf member DB
ip address 10.10.8.251/24
hsrp 80
preempt
priority 110
ip 10.10.8.254
interface port-channel10
no switchport
vrf member Keep_alive
ip address 172.16.1.1/30
interface port-channel20
switchport mode trunk
spanning-tree port type network
vpc peer-link
interface port-channel30
switchport mode trunk
vpc 101
interface Ethernet1/1
no switchport
channel-group 10 mode active
no shutdown
interface Ethernet1/2
no switchport
channel-group 10 mode active
no shutdown
interface Ethernet1/3
switchport mode trunk
channel-group 20 mode active
interface Ethernet1/4
switchport mode trunk
channel-group 20 mode active
interface Ethernet1/5
switchport mode trunk
channel-group 30 mode active
N9K-2:
cfs eth distribute
feature interface-vlan
feature hsrp
feature lacp
feature vpc
vlan 1-500
vrf context APP
vrf context CTRIX
vrf context DB
vrf context Keep_alive
vrf context VM
vrf context management
vpc domain 1000
peer-switch
peer-keepalive destination 172.16.1.1 source 172.16.1.2 vrf Keep_alive
auto-recovery
interface Vlan1
interface Vlan10
no shutdown
vrf member VM
ip address 10.10.1.252/24
hsrp 10
ip 10.10.1.254
interface Vlan20
no shutdown
vrf member VM
ip address 10.10.2.252/24
hsrp 20
ip 10.10.2.254
interface Vlan30
no shutdown
vrf member APP
ip address 10.10.3.252/24
hsrp 30
ip 10.10.3.254
interface Vlan40
no shutdown
vrf member APP
ip address 10.10.4.252/24
hsrp 40
ip 10.10.4.254
interface Vlan50
no shutdown
vrf member CTRIX
ip address 10.10.5.252/24
hsrp 50
ip 10.10.5.254
interface Vlan60
no shutdown
vrf member CTRIX
ip address 10.10.6.252/24
hsrp 60
ip 10.10.6.254
interface Vlan70
no shutdown
vrf member DB
ip address 10.10.7.252/24
hsrp 70
ip 10.10.7.254
interface Vlan80
no shutdown
vrf member DB
ip address 10.10.8.252/24
hsrp 80
ip 10.10.8.254
interface port-channel10
no switchport
vrf member Keep_alive
ip address 172.16.1.2/30
interface port-channel20
switchport mode trunk
spanning-tree port type network
vpc peer-link
interface port-channel30
switchport mode trunk
vpc 101
interface Ethernet1/1
no switchport
channel-group 10 mode active
no shutdown
interface Ethernet1/2
no switchport
channel-group 10 mode active
no shutdown
interface Ethernet1/3
switchport mode trunk
channel-group 20 mode active
interface Ethernet1/4
switchport mode trunk
channel-group 20 mode active
interface Ethernet1/5
switchport mode trunk
channel-group 30 mode active
N5K：
vlan 1-500
vrf context management
interface port-channel30
switchport mode trunk
interface Ethernet1/1
switchport mode trunk
channel-group 30 mode active
interface Ethernet1/2
switchport mode trunk
channel-group 30 mode active
在N9K上查看VPC状态如下：
要点总结：
（1）keep_alive最好一个vrf，并且最好一个做链路聚合
（2）最好配置auto-recovery和peer-switch