Configure Explicit Host Tracking

Configure explicit host tracking to track all the source and group members.

Procedure

Enter Interface Configuration mode:

enable

configure terminal

interface GigabitEthernet {slot/port[/sub-port][-slot/port[/sub-port]][,...]} or interface vlan <1–4059>

Note

If the platform supports channelization and the port is channelized, you must also specify the sub-port in the format slot/port/sub-port.
Configure explicit host tracking:

ip igmp igmpv3–explicit-host-tracking
Display all the tracked members for a specific group:

show ip igmp group group <A.B.C.D> tracked-members [member-subnet <A.B.C.D/X>] [source-subnet <A.B.C.D/X>] [port {slot/port[/sub-port][-slot/port[/sub-port]][,...]}] [vlan <1-4059>]
Display the IGMPv3 specific data:

show ip igmp group group <A.B.C.D> detail port {{slot/port[/sub-port][-slot/port[/sub-port]][,...]}} vlan <1-4059>

Examples

Configure explicit host tracking:

Switch:1(config-if)#ip igmp igmpv3–explicit-host-tracking

Display all the tracked members:

Switch:1#show ip igmp group

================================================================================
                           Igmp Group - GlobalRouter
================================================================================
GRPADDR         INPORT          MEMBER          EXPIRATION TYPE       L2ISID
--------------------------------------------------------------------------------
224.5.2.1       V701-1/4        62.0.1.1        214        Dynamic    40400
224.5.2.2       V702-1/4        62.0.2.1        221        Dynamic    40400
224.5.2.3       V703-1/4        62.0.3.1        217        Dynamic    40400
224.5.2.4       V704-1/4        62.0.4.1        223        Dynamic    40400

4 out of 4 group Receivers displayed

Total number of unique groups 2

Display all the tracked members for a specific group:

Switch:1(config-if)#show ip igmp group group 232.1.1.1 tracked-members
================================================================================
                          Members of Channels/Groups - GlobalRouter 
================================================================================
INTERFACE       CHANNEL/GROUP         MEMBER           MEMBER_MODE EXP
--------------------------------------------------------------------------------
Vlan333-1/30    */232.1.1.1          133.133.133.200   IS_EXCLUDE  205

Note:
The "*" attached to the interface (if any) indicates that the interface has explicit host tracking disabled.

Display IGMPv3 specific data:

Switch:1(config-if)#show ip igmp group group 232.32.32.10 detail
================================================================================
                        Igmp Group Detail - GlobalRouter
================================================================================
Interface:                     Vlan222-1/10
IGMPv3 Group:                  232.32.32.10
Interface Group Mode:          INCLUDE
Interface Compatibility Mode:  IGMP_V3
V2 Host Timer:                 Not Running
V1 Host Timer:                 Not Running
Interface Group Include Source List:
        Source Address  Expires   
        133.133.133.200 114

Variable definitions

Use the data in the following table to use the ip igmp igmpv3–explicit-host-tracking command.


Variable	Value
explicit-host-tracking	Enables explicit host tracking on IGMPv3. The default state is disable.
`<A.B.C.D>`	Specifies the IP address of the group of the tracked member.