Cisco ASA 5505 - Manual (Page 501)

26-9
Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter 26 Configuring Multicast Routing
Customizing Multicast Routing
Changing the IGMP Version
By default, the ASA runs IGMP Version 2, which enables several additional features such as the igmp
query-timeout and igmp query-interval commands.
All multicast routers on a subnet must support the same version of IGMP. The ASA does not
automatically detect Version 1 routers and switch to Version 1. However, a mix of IGMP Version 1 and
2 hosts on the subnet works; the ASA running IGMP Version 2 works correctly when IGMP Version 1
hosts are present.
To control which version of IGMP is running on an interface, enter the following command:
Configuring PIM Features
Routers use PIM to maintain forwarding tables for forwarding multicast diagrams. When you enable
multicast routing on the ASA, PIM and IGMP are automatically enabled on all interfaces.
Note PIM is not supported with PAT. The PIM protocol does not use ports, and PAT only works with protocols
that use ports.
This section describes how to configure optional PIM settings and includes the following topics:
• Enabling and Disabling PIM on an Interface, page 26-10
• Configuring a Static Rendezvous Point Address, page 26-10
• Configuring the Designated Router Priority, page 26-11
• Configuring and Filtering PIM Register Messages, page 26-11
• Configuring PIM Message Intervals, page 26-12
• Filtering PIM Neighbors, page 26-12
Step 2 igmp query-timeout seconds
Example:
hostname(config-if)# igmp query-timeout 30
Changes the timeout value of the query.
Valid values range from 0 to 500; 225 is the default value.
Step 3 igmp query-max-response-time seconds
Example:
hostname(config-if)# igmp
query-max-response-time 30
Changes the maximum query response time.
Command Purpose
Command Purpose
igmp version {1 | 2}
Example:
hostname(config-if)# igmp version 2
Controls the version of IGMP that you want to run on the interface.