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DES-7200 Configuration Guide Chapter 5 PIM-DM
Configuration
5-5
5.2.7 Configuring PIM-DM Status Refresh
At administration mode, it is permitted to forward PIM-DM state refresh control
message by default. For the first-hop router directly connected to the source, the
interface configuration state refresh interval is the interval at which the state
refresh packets are sent. In this case, it is only effective for the upstream
interfaces. For subsequent routers, it is the interval at which the interfaces are
allowed to receive and process the state refresh packets.
Command Function
DES-7200(config-if）#no ip pim
state-refresh disable
Enable processing or forwarding PIM-DM
status refresh messages.
DES-7200(config-if）# ip pim
state-refresh disable
Disable processing or forwarding PIM-DM
status refresh message.
The PIM-DM status refresh function is enabled by default.
Caution
Disabling the status update messages may cause the re-convergence of the
converged PIM-DM multicast forward tree, resulting in unnecessary bandwidth
waste and routing table vibration. Therefore, it is better not to disable the status
update function.
5.2.8 Configuring the Interval of Sending PIM-DM Status Refresh
Message
When the PIM-DM is enabled on the device, if some interface is directly
connected with the multicast source, the status refresh messages will be sent to
the downstream device on regular basis, so as to refresh the statuses of the
whole network. You can modify the interval of sending PIM status refresh
message on an interface according to the real network circumstances.
To configure the interval of sending PIM status message on the interface, run the
following command in the interface configuration mode:
Command Function
DES-7200(config-if）#ip pim
state-refresh origination-interval
seconds
Configure the interval of sending PIM
status refresh message on the current
interface as “seconds”, where “seconds” is
an integer within 1-100, in seconds.
DES-7200(config-if）#no ip pim
state-refresh origination-interval
Cancel the configuration of the PIM
flood delay on the current interface.
By default, the interval of sending PIM status refresh message on the interface is
60 seconds.
Note
Only the devices directly connected to multicast source can periodically send
the PIM status updated message to the downward interfaces. Thus, if the
devices are not directly connected to the multicast source, the forwarding
interval of PIM status update message configured on the downstream interface
is invalid.
5.3 Monitoring and Maintaining PIM-DM
5.3.1 Viewing PIM-DM Status Information
Command Function