Troubleshooting Igmp Snooping Configuration; Layer 2 Multicast Forwarding Cannot Function - HP A6600 Configuration Manual

224.1.1.1
When Host A leaves the multicast group, it sends an IGMP leave message to Router B. Receiving the
message, Router B removes port GigabitEthernet 1/0/3 from the member port list of the forwarding entry
for the group; however, it does not remove the group or forward the leave message to Router A because
Host B is still in the group. Use display igmp-snooping group to display information about IGMP snooping
groups. For example:
# Display information about IGMP snooping groups on Router B.
[RouterB] display igmp-snooping group
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Port flags: D-Dynamic port, S-Static port, C-Copy port
Subvlan flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port.
IP group(s):the following ip group(s) match to one mac group.
IP group address:224.1.1.1
(0.0.0.0, 224.1.1.1):
Host port(s):total 1 port.
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 1 port.

Troubleshooting IGMP snooping configuration

Layer 2 multicast forwarding cannot function

Symptom
Layer 2 multicast forwarding cannot function.
Analysis
IGMP snooping is not enabled.
Solution
Enter display current-configuration to view the running status of IGMP snooping.
1.
If IGMP snooping is not enabled, use igmp-snooping to enable IGMP snooping globally, and then
2.
use igmp-snooping enable to enable IGMP snooping in VLAN view.
If IGMP snooping is disabled only for the corresponding VLAN, just use igmp-snooping enable in
3.
VLAN view to enable IGMP snooping in the corresponding VLAN.
0.0.0.0
GE1/0/1
GE1/0/4
GE1/0/4
00:00:06 00:02:04
(D) ( 00:01:23 )
(D)
42