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Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter26 Configuring Multicast Routing
Customizing Multicast Routing
Configuring PIM Message Intervals
Router query messages are used to select the PIM DR. The PIM DR is responsible for sending router
query messages. By default, router query messages are sent every 30 seconds. Additionally, every 60
seconds, the ASA sends PIM join or prune messages.
To change these intervals, perform the following steps:
Detailed Steps
Filtering PIM Neighbors
You can define the routers that can become PIM neighbors. By filtering the routers that can become PIM
neighbors, you can do the following:
•Prevent unauthorized routers from becoming PIM neighbors.
•Prevent attached stub routers from participating in PIM.
To define neighbors that can become a PIM neighbor, perform the following steps:
Detailed Steps
Command Purpose
Step1 pim hello-interval seconds
Example:
hostname(config-if)# pim hello-interval 60
Sends router query messages.
Valid values for the seconds argument range from 1 to 3600
seconds.
Step2 pim join-prune-interval seconds
Example:
hostname(config-if)# pim
join-prune-interval 60
Changes the amount of time (in seconds) that the ASA sends PIM
join or prune messages.
Valid values for the seconds argument range from 10 to 600
seconds.
Command Purpose
Step1 access-list pim_nbr deny router-IP_addr
PIM neighbor
Example:
hostname(config)# access-list pim_nbr deny
10.1.1.1 255.255.255.255
Uses a standard access list to define the routers that you want to
have participate in PIM.
In the example, the following access list, when used with the pim
neighbor-filter command, prevents the 10.1.1.1 router from
becoming a PIM neighbor.
Step2 pim neighbor-filter pim_nbr
Example:
hostname(config)# interface
GigabitEthernet0/3
hostname(config-if)# pim neighbor-filter
pim_nbr
Filters neighbor routers.
In the example, the 10.1.1.1 router is prevented from becoming a
PIM neighbor on interface GigabitEthernet0/3.