User Manual
UMN:CLI
V8102
535
the DR periodically sends the PIM null-register message that does not contain the encap-
sulated multicast traffic to the RP, and the RP returns the register-stop message. If there
is no response to the null-register message during a given period, the multicast routing
entry with (S, G) state is expired, and the source registration process will start again.
You can specify the interval to send the PIM null-register message which is also called
the registration suppression time. When you specify this value at the RP, the configuration
modifies the keep alive time (KAT) for the RP, if the
ip pim rp-register-kat
command is
not used. To specify the registration suppression time, use the following command.
Command
Mode
Description
ip pim register-suppression
<1-65535>
Global
Specifies the registration suppression time.
1-65535: null-register message interval (unit: second)
no ip pim register-suppression
Deletes the specified the registration suppression time.
Register Message Filtering
You can enable the router to filter multicast sources specified in access lists at the RP.
This filtering will permit/deny the PIM register messages for the specified sources. If un-
authorized sources try to register with the RP, the RP then drops the PIM register mes-
sages from those sources. You can specify the either multicast source or source
’s DR
address in access lists.
To enable the router to filter multicast sources, use the following command.
Command
Mode
Description
ip pim accept-register list
{<100-
199> | <2000-2699> |
WORD
}
Global
Enables the router to filter multicast sources.
100-199: IP extended access list
2000-2699: IP extended access list (extended range)
WORD: access list name
no ip pim accept-register
Disables the router to filter multicast sources.
RP Reachability Validation
To enable the RP reachability validation for the source registration process at the first-hop
router, use the following command.
Command
Mode
Description
ip pim register-rp-reachability
Global
Enables the RP reachability validation.
no ip pim register-rp-
reachability
Disables the RP reachability validation. (default)
Source Address of Register Message
You can specify the source IP address of PIM register messages sent by the DR. This
address is used to send corresponding PIM register-stop messages in response. By de-
fault, the source address of register messages is the IP address of the interface toward
the RP. This address must be able to be learned by unicast routing protocols on the DR.
To specify the source IP address of PIM register messages, use the following command.
