# vPC failure scenarios

Topology

[ N7K1 ]--- PK ---[ N7K2 ]
[ N7K1 ]--- PL ---[ N7K2 ]

[ N7K1 ]--- vPC ---[ N5K ]
[ N7K2 ]--- vPC ---[ N5K ]

Peer-Link goes down

[ N7K1 ]

- Peer-Link up --> down
- Peer-Keepalive up
- vPC up
- Role: primary

[ N7K2 ]

- Peer-Link up --> down
- Peer-Keepalive up
- vPC up ------> down (suspend)
- Role: secondary

Peer-Link is down and Peer-Keepalive goes down as well (dual active)

[ N7K1 ]

- Peer-Link down
- Peer-Keepalive up --> down
- vPC up
- Role: primary

[ N7K2 ]

- Peer-Link down
- Peer-Keepalive up --> down
- vPC down ------> up (if auto-recovery enabled)
- Role: secondary ------> primary (if auto-recovery enabled)

Peer-Keepalive goes down

[ N7K1 ]

- Peer-Link up
- Peer-Keepalive up --> down
- vPC up
- Role: primary

[ N7K2 ]

- Peer-Link up
- Peer-Keepalive up --> down
- vPC up
- Role: secondary

Peer-Keepalive is down and Peer-Link goes down as well (dual-active)

[ N7K1 ]

- Peer-Link up --> down
- Peer-Keepalive down
- vPC up
- Role: primary

[ N7K2 ]

- Peer-Link up --> down
- Peer-Keepalive down
- vPC up
- Role: secondary ------> primary (if auto-recovery enabled)

Peer-Link and Peer-Keepalive go down at the same time (dual-active)

[ N7K1 ]

- Peer-Link up --> down
- Peer-Keepalive up --> down
- vPC up
- Role: primary

[ N7K2 ]

- Peer-Link up --> down
- Peer-Keepalive up --> down
- vPC up
- Role: secondary ------> primary (if auto-recovery enabled)

All tracked objects go down on primary

[ N7K1 ]

- Peer-Link up --> down
- Peer-Keepalive up
- vPC up --> down
- Role: primary ------> secondary

[ N7K2 ]

- Peer-Link up --> down
- Peer-Keepalive up
- vPC up
- Role: secondary ------> primary

All tracked objects go down on primary and Peer-Keepalive goes down at the same time

[ N7K1 ]

- Peer-Link up --> down
- Peer-Keepalive up --> down
- vPC up --> down
- Role: primary

[ N7K2 ]

- Peer-Link up --> down
- Peer-Keepalive up --> down
- vPC up
- Role: secondary ------> primary (if auto-recovery enabled)

Primary has power failure and is shut down

[ N7K2 ]

- Peer-Link up --> down
- Peer-Keepalive up --> down
- vPC up
- Role: secondary ------> primary (if auto-recovery enabled)