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DES-7200 Configuration Guide Chapter 6 PIM-SM
Configuration
6-4
If the interface is of tunnel-type, only 4Over4 configuration tunnel, 4Over4GRE
tunnel, 4Over6 configuration tunnel and 4Over6 GRE tunnel support the IPv4
multicasting at the moment. The multicasting can be also enabled on other
tunnel interfaces that doe not support the multicasting, but no error message
will be displayed and no multicast packets will be received and sent.
The multicast tunnel can be created on the Ethernet interface only, nested
tunnel and multicast data Qos/ACL are not supported.
6.3.3 Configuring the Interval of Sending the Hello Message
When the PIM-SM is enabled on the interface, the device periodically sends Hello
messages to the interfaces of neighbors. You can set the interval of sending Hello
messages according to real network environment.
To configure the interval of sending the Hello message, execute following
commands in the interface mode:
Command Function
DES-7200(config-if)# ip pim
query-interval interval-seconds
Set the interval of sending the Hello
message.
interval-seconds: in the range of 1 to
65535 seconds
DES-7200(config-if)# no ip pim
query-interval
Restore the interval of sending the Hello
message to the default value.
The interval of sending the Hello message on the interface is 30 second by
default.
Note
When the interval of sending Hello message is changed, the hold time of Hello
message also changes by the following rule. The hold time becomes 3.5 times
of the interval of sending Hello message. If the interval multiplying 3.5 is larger
than 65535, the hold time is set to 65535.
6.3.4 Configuring the Propagation Delay of the Hello Message
To configure the propagation delay of the hello message, execute following
commands in the interface mode:
Command Function
ip pim propagation-delay
interval-milliseconds
Set the propagation delay in the range of
1 to 32767 milliseconds.
no ip pim propagation-delay
Restore the setting to the default value,
500 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.
6.3.5 Configuring the Override Interval of the Hello Message
To configure the override interval of the hello message, execute following
commands in the interface mode:
Command Function