SMC Networks 7724M/VSW - annexe 1, Manual

Page: 353 / 387

CLI Management Guide
TigerAccess™ EE
352 SMC7824M/VSW
9.1.2.1 IGMP Static Join
When there are no more group members on a network segment or a host cannot report
its group membership using IGMP, multicast traffic is no longer transmitted to the network
segment. However, you may want to pull down multicast traffic to a network segment to
reduce the time from when an IGMP join request is made to when the requested stream
begins arriving at a host, which is called the zapping time.
The IGMP static join feature has been developed to reduce the zapping time by statically
creating a virtual host that behaves like a real on a port, even if there is no group member
in the group where the port belongs. As a result, a multicast router realizes there is still
group member, allowing multicast traffic to be permanently reachable on the group.
To configure the IGMP static join, use the following command.
Command Mode Description
ip igmp static-group A.B.C.D
vlan VLAN port PORT [ reporter
A.B.C.D ]
Configures the IGMP static join.
A.B.C.D: IGMP group address
VLANS: VLAN ID (1-4094)
reporter: host address
no ip igmp static-group
no ip igmp static-group { A.B.C.D
| vlan VLAN }
no ip igmp static-group A.B.C.D
vlan VLAN [ port PORT ]
no ip igmp static-group A.B.C.D
vlan VLAN port PORT reporter
{ A.B.C.D | *}
Global
Deletes the configured IGMP static join.
*: all addresses
To configure the IGMP static join for a range of IGMP groups by access lists, use the fol-
lowing command.
Command Mode Description
ip igmp static-group list {<1-99>
| <1300-1999> | WORD}
vlan VLAN port PORT [ reporter
A.B.C.D ]
Configures the IGMP static join for a range of IGMP
groups by access lists.
1-99: IP standard access list
1300-1999: IP standard access list (expanded)
WORD: access list name
VLANS: VLAN ID (1-4094)
reporter: host address
no ip igmp static-group list {<1-
99> | <1300-1999> | WORD}
no ip igmp static-group list {<1-
99> | <1300-1999> | WORD} vlan
VLAN [ port PORT ]
no ip igmp static-group list {<1-
99> | <1300-1999> | WORD} vlan
VLAN port PORT reporter
{ A.B.C.D | *}
Global
Deletes the configured IGMP static join for a range of
IGMP groups.
*: all addresses