VPN tunnel interface down causes

[asingh005]

Hi, 
Can anyone tell me various reasons/causes for the VPN tunnel interface going down ?

Thahkyou
Regards.
Aateek singh

[Marcin Latosiewicz · Accepted solution]

Depends on your encapsulation type. The most common:

- GRE: source interface down, destination not routable, GRE keepalives failed. 

- VTI:  source interface down, destination not routable, IPsec SAs are not up. 

[asingh005]

Hi Marcin Latosiewicz
Thank you sir.

Regards
Aateek