ripng poison-reverse

Function

The ripng poison-reverse command enables poison reverse for RIPng Update packets.

The undo ripng poison-reverse command disables poison reverse for RIPng Update packets.

On non-broadcast multiple access (NBMA) networks, poison reverse is enabled on interfaces by default. On other types of networks, poison reverse is disabled on interfaces by default.

Format

ripng poison-reverse

undo ripng poison-reverse

Parameters

None

Views

100GE interface view, 10GE interface view, 25GE sub-interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE electrical interface view, GMPLS-UNI interface view, Global VE sub-interface view, Tunnel interface view, VE sub-interface view, VLANIF interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ripng	write

Usage Guidelines

Usage Scenario

Poison reverse is used to prevent routing loops. After poison reverse is configured, a RIPng interface sets the cost of the route learned from a neighbor to 16 (indicating that the route is unreachable) and then sends the route back to the neighbor. To enable poison reverse, run the ripng poison-reverse command.

Precautions

If both split horizon and poison reverse are configured, only poison reverse takes effect.

Example

# Enable poison reverse for RIPng Update packets.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/0] ripng poison-reverse