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Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Multicast Routing
Customizing Multicast Routing
IGMP uses group addresses (Class D IP address) as group identifiers. Host group address can be in the
range of 224.0.0.0 to 239.255.255.255. The address 224.0.0.0 is never assigned to any group. The
address 224.0.0.1 is assigned to all systems on a subnet. The address 224.0.0.2 is assigned to all routers
on a subnet.
When you enable multicast routing on the ASA, IGMP Version 2 is automatically enabled on all
interfaces.
Note
Only the
no igmp
command appears in the interface configuration when you use the
show run
command. If the
multicast-routing
command appears in the device configuration, then IGMP is
automatically enabled on all interfaces.
This section describes how to configure optional IGMP setting on a per-interface basis and includes the
following topics:
•
Disabling IGMP on an Interface, page 1-6
•
Configuring IGMP Group Membership, page 1-7
•
Configuring a Statically Joined IGMP Group, page 1-7
•
Controlling Access to Multicast Groups, page 1-8
•
Limiting the Number of IGMP States on an Interface, page 1-8
•
Modifying the Query Messages to Multicast Groups, page 1-8
•
Changing the IGMP Version, page 1-9
Disabling IGMP on an Interface
You can disable IGMP on specific interfaces. This information is useful if you know that there are no
multicast hosts on a specific interface and you want to prevent the ASA from sending host query
messages on that interface.
To disable IGMP on an interface, enter the following command:
Note
Only the
no igmp
command appears in the interface configuration.
Command
Purpose
no igmp
Example:
hostname(config-if)# no igmp
Disables IGMP on an interface.
To reenable IGMP on an interface, use the
igmp
command.
Summary of Contents for 5505 - ASA Firewall Edition Bundle
Page 28: ...Glossary GL 24 Cisco ASA Series CLI Configuration Guide ...
Page 61: ...P A R T 1 Getting Started with the ASA ...
Page 62: ......
Page 219: ...P A R T 2 Configuring High Availability and Scalability ...
Page 220: ......
Page 403: ...P A R T 2 Configuring Interfaces ...
Page 404: ......
Page 499: ...P A R T 2 Configuring Basic Settings ...
Page 500: ......
Page 533: ...P A R T 2 Configuring Objects and Access Lists ...
Page 534: ......
Page 601: ...P A R T 2 Configuring IP Routing ...
Page 602: ......
Page 745: ...P A R T 2 Configuring Network Address Translation ...
Page 746: ......
Page 845: ...P A R T 2 Configuring AAA Servers and the Local Database ...
Page 846: ......
Page 981: ...P A R T 2 Configuring Access Control ...
Page 982: ......
Page 1061: ...P A R T 2 Configuring Service Policies Using the Modular Policy Framework ...
Page 1062: ......
Page 1093: ...P A R T 2 Configuring Application Inspection ...
Page 1094: ......
Page 1191: ...P A R T 2 Configuring Unified Communications ...
Page 1192: ......
Page 1333: ...P A R T 2 Configuring Connection Settings and QoS ...
Page 1334: ......
Page 1379: ...P A R T 2 Configuring Advanced Network Protection ...
Page 1380: ......
Page 1475: ...P A R T 2 Configuring Modules ...
Page 1476: ......
Page 1549: ...P A R T 2 Configuring VPN ...
Page 1550: ......
Page 1965: ...P A R T 2 Configuring Logging SNMP and Smart Call Home ...
Page 1966: ......
Page 2059: ...P A R T 2 System Administration ...
Page 2060: ......
Page 2098: ...1 8 Cisco ASA Series CLI Configuration Guide Chapter 1 Troubleshooting Viewing the Coredump ...
Page 2099: ...P A R T 2 Reference ...
Page 2100: ......