non-revertive

Function

The non-revertive command enables the non-revertive function for an ESI instance.

The undo non-revertive command disables the non-revertive function for an ESI instance.

By default, the system is not enabled with the non-revertive function for an ESI instance.

Format

non-revertive

undo non-revertive

Parameters

None

Views

preference-based view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

In multi-homing networking, a CE is dual-homed to PE1 and PE2, and PE1 is elected as the master DF for traffic forwarding because of a higher precedence. If PE1 fails, traffic is switched to PE2. After PE1 recovers, traffic is switched back to PE1. To reduce the number of traffic switching times and maintain the stability of the service topology, run the non-revertive command to enable non-revertive traffic switching.

Example

# Enable the non-revertive function for an ESI instance.

<HUAWEI> system-view
[~HUAWEI] evpn
[*HUAWEI-evpn] esi 0011.1001.1001.1001.1002
[*HUAWEI-evpn-esi-0011.1001.1001.1001.1002] df-election type preference-based
[*HUAWEI-evpn-esi-0011.1001.1001.1001.1002-preference-based] non-revertive