Brocade FastIron Ethernet Switch IP Multicast Configuration Guide - Manual (Page 163)

Configuring an ACL for IGMPv2 SSM mapping
You can use either a standard or extended ACL to identify the group multicast address you want to add
source addresses to when creating a IGMPv3 report.
For standard ACLs, you must create an ACL with a permit clause and the ip-source-address variable
must contain the group multicast address. This can be configured directly with a subnet mask or with
the host keyword in which case a subnet mask of all zeros (0.0.0.0) is implied.
In the following example, access-list 20 is configured for the group multicast address: 224.1.1.0 with a
subnet mask of 0.0.0.255.
device(config)# access-list 20 permit 224.1.1.0 0.0.0.225
In the following example, access-list 20 is configured for the group multicast address: 239.1.1.1 by
including the host keyword.
device(config)# access-list 20 host 239.1.1.1
For extended ACLs, the source address variable must contain either 000 or the any keyword.
Additionally, the extended ACL must be configured with a permit clause and the host keyword. This can
be configured directly with a subnet mask or with the host keyword in which case a subnet mask of all
zeros (0.0.0.0) is implied.
The ip-destination-address variable must contain the group multicast address.
In the following example, access-list 100 is configured for the group multicast address: 232.1.1.1 with a
subnet mask of 0.0.0.255.
device(config)# access-list 20 permit 224.1.1.0 0.0.0.225
In the following example, access-list 100 is configured for the group multicast address: 232.1.1.1.
device(config)# access-list 100 permit any host 232.1.1.1
Configuring the IGMPv2 SSM mapping commands
The ip ssm-map commands are used to enable the IGMPv2 mapping feature and to define the maps
between IGMPv2 Group addresses and multicast source addresses as described in the following
sections.
Enabling IGMPv2 SSM mapping
To enable the IGMPv2 mapping feature enter the command as shown in the following.
device(config)# ip igmp ssm-map enable
Syntax: [no] ip igmp ssm-map enable
The no option is used to turn off the IGMPv2 mapping feature that has previously been enabled.
Configuring the map between a IGMPv2 group address and a multicast source
To configure a map between an IGMPv2 Group address and a multicast source address use the ip
igmp ssm-map static command, as shown in the following.
device(config)# ip igmp ssm-map 20 1.1.1.1
Syntax: [no] ip igmp ssm-map aci-id source-address
Configuring an ACL for IGMPv2 SSM mapping
FastIron Ethernet Switch IP Multicast Configuration Guide 161
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