L3 Failure Paths
Let us learn about the Layer 3 failure on all other paths and understand that there is no
way to reach the WAN side destination optimally or sub-optimally.
| Where Can I Use This? | What Do I Need? |
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Layer Failure 3 paths can be private wan or internet paths, VPN, or standard
VPNs. The L3 failure path will only be used when there is a Layer 3 failure on all other
active and backup paths and there is no way to reach the WAN side destination optimally
or sub-optimally. Typical usecase for L3 Failure path would be a Metered 4G/5G
connection. To keep bandwidth consumption low on the cellular circuit you can configure
it as a L3 failure path.
A path that is configured in the Layer 3 failure
paths list is considered only in the following conditions:
Condition 1
All active and backup paths
are up and available, but Layer 3 is unreachable.
Layer 3 failure paths are configured and up.
At least one Layer 3 failure path is Layer 3 reachable.
Condition 2
All active and backup paths are
down or routes on both paths do not exist. For example, direct on
public-1 and public-1 do not exist.
Layer 3 failure paths are configured and are up.
Condition 3
