pim silent (Mtunnel view)

Function

The pim silent command enables the PIM silent function on an interface.

The undo pim silent command disables the PIM silent function on an interface.

By default, the PIM silent function is not enabled on an interface.

Format

pim silent

undo pim silent

Parameters

None

Views

MTI interface view, Mtunnel view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
pim	write

Usage Guidelines

Usage Scenario

To prevent malicious hosts from constructing pseudo PIM Hello messages to attack a router, enable PIM silent using the pim silent command on an interface connected to hosts. After PIM silent is enabled on an interface, all PIM packets will be discard by this interface, and all PIM neighbors and PIM state machines will be deleted for this interface. The interface automatically becomes a static designated router (DR). IGMP functions, however, are not affected on the interface.

Precautions

PIM silent applies only to interfaces directly connected to a host network segment on which only one PIM device is deployed.

The pim silent command is mutually exclusive with the pim timer dr-switch-delay command.
The pim silent command is mutually exclusive with the pim dm command.
The pim silent command is mutually exclusive with the pim bfd enable command.
If PIM silent is enabled on an interface connected to a router, a PIM neighbor relationship cannot be set up on the interface, causing multicast faults.
If a host network segment connects to multiple routers and PIM silent is enabled on interfaces of multiple routers, all these interfaces become static DRs, causing multicast faults.

Example

# Configure the PIM silent function on Mtunnel 10.

<HUAWEI> system-view
[~HUAWEI] multicast routing-enable
[*HUAWEI] interface Mtunnel 10
[*HUAWEI-MTunnel10] pim silent