pim ipv6 silent

Function

The pim ipv6 silent command enables the PIM silent (IPv6) function on an interface.

The undo pim ipv6 silent command cancels the PIM silent (IPv6) function on an interface.

By default, the PIM silent (IPv6) function is disabled on an interface.

Format

pim ipv6 silent

undo pim ipv6 silent

Parameters

None

Views

GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, Eth-Trunk interface view, VLANIF interface view, loopback interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To protect the switch against pseudo PIM Hello (IPv6) messages sent from malicious hosts, configure the pim ipv6 silent command on the interface directly connected to the host network segment to set the interface to PIM silent (IPv6) mode. Then the interface cannot receive or forward any PIM (IPv6) packet, and all PIM (IPv6) neighbors and PIM (IPv6) state machines on this interface are deleted. This interface becomes the DR, but the MLD function on the interface is not affected.

The PIM silent (IPv6) function applies only to the interface directly connected to a host network segment, and only one PIM switch can be connected to this network segment.

Prerequisites

IPv6 multicast routing has been enabled using the multicast ipv6 routing-enable command in the system view.

Precautions

Running the pim ipv6 silent command failed on the VLANIF interface because Layer 2 multicast querier or report-suppress is enabled for this VLAN.

If PIM BFD (IPv6) function is enabled on the interface, this command cannot be configured.

This command and pim ipv6 timer dr-switch-delay command are mutually exclusive.

After you run this command on an interface, the interface no longer receives or sends any PIM (IPv6) packets and other PIM (IPv6) functions on the interface become invalid. Confirm your action before using this command.

If a host network segment is connected to multiple switches and PIM silent (IPv6) is enabled on multiple interfaces, all these interfaces become static DRs. This causes multicast forwarding failures.

Example

# Configure the PIM silent (IPv6) function on VLANIF100.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] pim ipv6 silent

# Configure the PIM silent (IPv6) function on GE0/0/1.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] pim ipv6 silent