rip poison-reverse

Function

The rip poison-reverse command enables poison reverse for RIP update packets.

The undo rip poison-reverse command disables poison reverse.

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

rip poison-reverse

undo rip 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, VBDIF interface view, VE sub-interface view, VLANIF interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
rip	write

Usage Guidelines

Usage Scenario

Poison reverse allows a RIP-enabled interface to set the cost of the route that it learns from a neighbor to 16 (indicating that the route is unreachable) and then send the route back. After receiving this route, the neighbor deletes the useless route from its routing table, which prevents loops. To enable poison reverse for RIP update packets, run the rip poison-reverse command.

Precautions

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

Example

# Enable poison reverse on the interface.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] rip poison-reverse