Cisco FirePOWER ASA 5500 series User Manual

11-14
Cisco Security Appliance Command Line Configuration Guide
OL-10088-01
Chapter 11 Configuring Multicast Routing
Enabling Multicast Routing
Enabling Multicast Routing
Enabling multicast routing lets the security appliance forward multicast packets. Enabling multicast
routing automatically enables PIM and IGMP on all interfaces. To enable multicast routing, enter the
following command:
hostname(config)# multicast-routing
The number of entries in the multicast routing tables are limited by the amount of RAM on the system.
Table 11-1 lists the maximum number of entries for specific multicast tables based on the amount of
RAM on the security appliance. Once these limits are reached, any new entries are discarded.
Configuring IGMP Features
IP hosts use IGMP to report their group memberships to directly connected multicast routers. IGMP uses
group addresses (Class D IP address) as group identifiers. Host group address can be in the range
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 security appliance, 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. This section
includes the following topics:
• Disabling IGMP on an Interface, page 11-15
• Configuring Group Membership, page 11-15
• Configuring a Statically Joined Group, page 11-15
• Controlling Access to Multicast Groups, page 11-15
• Limiting the Number of IGMP States on an Interface, page 11-16
• Modifying the Query Interval and Query Timeout, page 11-16
• Changing the Query Response Time, page 11-17
• Changing the IGMP Version, page 11-17
Table 11-1 Entry Limits for Multicast Tables
Table 16 MB 128 MB 128+ MB
MFIB
1000 3000 5000
IGMP Groups
1000 3000 5000
PIM Routes
3000 7000 12000

Cisco FirePOWER ASA 5500 series Specifications

General

Brand	Cisco
Model	FirePOWER ASA 5500 series
Category	Firewall
Language	English