Configuring a PIM hello policy
About PIM hello policies
This feature enables the device to filter PIM hello messages by using an ACL that specifies the packet source addresses. It is used to guard against PIM message attacks and to establish correct PIM neighboring relationships.
If hello messages of an existing PIM neighbor are filtered out by the policy, the neighbor is automatically removed when its aging timer expires.
Procedure
Enter system view.
system-view
Enter interface view.
interface interface-type interface-number
Configure a PIM hello policy.
pim neighbor-policy ipv4-acl-number
By default, no PIM hello policy is configured on an interface. All PIM hello messages are regarded as legal.