Brocade Communications Systems IPMC5000PEF manual Configuring an ACL for IGMPv2 SSM mapping

Configuring an ACL for IGMPv2 SSM mapping

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-addressvariable 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-addressvariable 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-mapcommands 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-idsource-address

FastIron Ethernet Switch IP Multicast Configuration Guide	161
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