ssm-enable

Globally enables source-specific multicast (SSM).
Syntax
ssm-enable [ range { group-address address-mask | acl-id } ]
no ssm-enable range { group-address address-mask | acl-id }
Command Default

SSM mode is disabled.

Parameters
range
Configures the IP multicast address range.
group-address address-mask
Specifies the IP multicast group address and network mask. If this is not configured, the range willdefault to 232/8 as assigned by the Internet Assigned Numbers Authority (IANA) for use with SSM
acl-id
Specifies the ACL number or name.
Modes

IPv4 PIM router configuration mode

IPV6 PIM router configuration mode

IPv4 PIM router configuration mode VRF configuration mode

IPv6 PIM router configuration modeVRF configuration mode

Usage Guidelines

PIM-SM must be enabled on any ports on which you want SSM to operate.

In the case of IPv4 PIM router configuration mode, the address-range can be specified in the format A.B.C.D P.Q.R. S where P.Q.R.S is the network mask or as A.B.C.D/L. If the address is not configured, the range will default to 232/8 as assigned by the Internet Assigned Numbers Authority (IANA) for use with SSM.

In the case of IPv6 PIM router configuration mode, the address-range can be specified in the format X:X::X:X/M. If the address is not configured, the address range will default to ff30:/12 as assigned by the Internet Assigned Numbers Authority (IANA) for use with SSM.

The no form of the command restores the default.

Examples

The following example enables SSM on an IPv6 PIM-SM-enabled port. 

device# configure terminal
device(config)# ipv6 router pim
device(config-ipv6-pim-router)# ssm-enable

The following example enables SSM on an IPv4 PIM-SM-enabled port. 

device# configure terminal
device(config)# router pim
device(config-pim-router)# ssm-enable

The following example configures a single SSM group IP address. 

device# configure terminal
device(config)# router pim
device(config-pim-router)# ssm-enable range 10.1.1.1/8

The following example configures PIM so that it uses the group addresses allowed by ACL “xyz” as its PIM SSM range. 

device# configure terminal
device(config)# router pim
device(config-pim-router)# ssm-enable range xyz

The following example enables SSM on an IP PIM-SM-enabled port for VRF red. 

device# configure terminal
device(config)# router pim vrf red
device(config-pim-router-vrf-red)# ssm-enable range 10.1.1.1/9
Parent topic: Commands Si - Z