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DES-7200 Configuration Guide Chapter 8 IGMP Snooping
Configuration
8-38
Multicast router learning mode: pim-dvmrp
IGMPv2 immediate leave: Disabled
IGMP VLAN querier: Disable
vlan 20
-------------
IGMP Snooping state: Enabled
Multicast router learning mode: pim-dvmrp
IGMPv2 immediate leave: Disabled
IGMP VLAN querier: Disable
vlan 30
-------------
IGMP Snooping state: Enabled
Multicast router learning mode: pim-dvmrp
IGMPv2 immediate leave: Disabled
IGMP VLAN querier: Disable
Step 3: Display router port configuration of Switch B
SwitchB#show ip igmp snooping mrouter
Multicast Switching Mroute Port
D: DYNAMIC
S: STATIC
(*, *, 10):
VLAN(10) 1 MROUTES:
GigabitEthernet 0/1(S)
(*, *, 20):
VLAN(20) 1 MROUTES:
GigabitEthernet 0/1(S)
(*, *, 30):
VLAN(30) 1 MROUTES:
GigabitEthernet 0/1(S)
Step 4: Send IP multicast traffic with group address being 224.1.1.1 through the
Source, and request multicast traffic on port Gi 0/3 of Switch B (belonging to
VLAN 20 and IP address being 192.168.2.3). Display the group members of
Switch A and CDA table of Switch B:
! Switch A
SwitchA#show ip igmp groups
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter
224.1.1.1 VLAN 10 00:00:16 00:04:04 192.168.2.3
! Switch B
SwitchB#show ip igmp snooping gda-table
Multicast Switching Cache Table
D: DYNAMIC
S: STATIC
M: MROUTE
(*,224.1.1.1, 20):
VLAN(1) 2 OPORTS:
GigabitEthernet 0/3(D)
GigabitEthernet 0/1(M)
! From the above information, we can learn that the group address range of IP
multicast traffic requested by port Gi 0/3 is 224.1.1.1-226.1.1.1, and the traffic is
forwarded through Share VLAN 10.
Step 5: Send IP multicast traffic with group address being 228.1.1.1 through the
Source, and request multicast traffic on port Gi 0/3 of Switch B (belonging to
VLAN 20 and IP address being 192.168.2.3). Display the group members of
Switch A and CDA table of Switch B:
! Switch A
SwitchA#show ip igmp groups
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter
228.1.1.1 VLAN 20 00:00:14 00:04:06 192.168.2.3
! Switch B