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DES-7200 Configuration Guide Chapter 6 PIM-SM
Configuration
6-5
Command Function
ip pim override-interval
interval-milliseconds
Set the override interval in the range of 1
to 65535 milliseconds.
no ip pim override-interval
interval-milliseconds
Restore the setting to the default value,
2500 milliseconds by default.
Note
Modifying propagation delay or prune deny delay will affect
J/P-override-interval. As specified in the protocol, J/P-override-interval must be
less than the hold time of Join-Prune message, or otherwise streams may be
interrupted temporarily.
6.3.6 Configuring the Neighbor Tracking of the Hello Message
The T bit of the LAN Prune Delay Option of the Hello message indicates whether
to enable join restriction on the interface. When join restriction is enabled on the
interface, the Join message sending to the upstream neighbor will be restricted
on the interface, namely it will not be sent to the upstream neighbor, upon the
receipt of the Join message from its neighbor to the upstream neighbor. If this
function is disabled, the Join message sending to the upstream neighbor will still
be sent on the interface upon the receipt of the Join message from its neighbor to
the upstream neighbor. Moreover, if join restriction is enabled on all downstream
receivers, the upstream router can track these receivers by received Join
messages. By default, this function is disabled on the interface.
To disable join restriction on the interface, execute following commands in the
interface mode:
Command Function
ip pim neighbor-tracking
Disable join restriction on the interface.
no ip pim neighbor-tracking
Enable join restriction on the interface.
6.3.7 Configuring the Triggered Hello Delay of the Hello Message
When a router starts or detects new neighbor, the router will send the Hello
message at random to avoid blocking. This random interval can be calculated
based on triggered hello delay, which is 5 seconds by default.
To set triggered hello delay, execute following commands in the interface mode:
Command Function
ip pim triggered-hello-delay
interval-seconds
Set the triggered hello delay in the range
of 1 to 5 seconds.
no ip pim triggered-hello-delay
Restore the setting to the default value.
Note
Modifying propagation delay or prune deny delay will affect
J/P-override-interval. As specified in the protocol, J/P-override-interval must be
less than the hold time of Join-Prune message, or otherwise streams may be
interrupted temporarily.
6.3.8 Configuring PIM-SM Neighbor Filtering
You can filter neighbors on an interface to enhance network security. With this
function enabled, when a neighbor is denied by an ACL, the PIM-SM will not
establish the adjacency relationship with that neighbor or remove the currently