The apply backup-interface command configures a backup outbound interface in a routing policy.
The undo apply backup-interface command restores the default setting.
By default, the backup outbound interface is not configured in a routing policy.
Product |
Support |
|---|---|
S5720-EI, S5720-HI, S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730-HI, S5730S-EI, S5730-SI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6720S-SI, S6720-SI, S6730-H, S6730S-H, S6730-S, and S6730S-S |
Supported. |
S2720-EI, S5720-LI, S5735-L, S5735S-L, S5735S-L-M, S5720S-LI, S6720-LI, and S6720S-LI |
Not supported. |
| Parameter | Description | Value |
|---|---|---|
interface-type interface-number |
Specifies the type and number of the backup outbound interface. |
- |
Usage Scenario
The apply backup-interface command is used in IP FRR scenarios to configure a backup outbound interface for a route. After IP FRR is enabled, data traffic can be quickly switched to the backup outbound interface if the primary link fails.
Prerequisites
if-match clauses can be used to configure matching rules such as IP prefix lists, and ACLs before a backup outbound interface is configured.
Follow-up Procedure
Reference a configured route-policy in the ip frr (system view) command or the ip frr (VPN instance view) command to configure IP FRR on a public network or VPN.
The apply backup-interface command is usually used together with the apply backup-nexthop command.
Precautions
For P2P links, a backup next hop is not necessary. For non-P2P links, a backup next hop is necessary.
# Configure the backup outbound interface and the backup next hop in the route-policy named ip_frr_rp.
<HUAWEI> system-view
[HUAWEI] route-policy ip_frr_rp permit node 10
[HUAWEI-route-policy] apply backup-interface vlanif10
[HUAWEI-route-policy] apply backup-nexthop 192.168.20.2
# Delete the configured backup outbound interface from the route-policy named ip_frr_rp.
<HUAWEI> system-view
[HUAWEI] route-policy ip_frr_rp permit node 10
[HUAWEI-route-policy] undo apply backup-interface