H3C Technologies H3C S5120 Series Switches - Manual (Page 336)

2-31
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.
GE1/0/1 (D) ( 00:01:23 )
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.
GE1/0/4 (D)
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 1 port.
GE1/0/4
Troubleshooting IGMP Snooping Configuration
Switch Fails in Layer 2 Multicast Forwarding
Symptom
A switch fails to implement Layer 2 multicast forwarding.
Analysis
IGMP snooping is not enabled.
Solution
1) Enter the display current-configuration command to view the running status of IGMP snooping.
2) If IGMP snooping is not enabled, use the igmp-snooping command to enable IGMP snooping
globally, and then use igmp-snooping enable command to enable IGMP snooping in VLAN view.
3) If IGMP snooping is disabled only for the corresponding VLAN, just use the igmp-snooping
enable command in VLAN view to enable IGMP snooping in the corresponding VLAN.
Configured Multicast Group Policy Fails to Take Effect
Symptom
Although a multicast group policy has been configured to allow hosts to join specific multicast groups,
the hosts can still receive multicast data addressed to other multicast groups.
Analysis
z The ACL rule is incorrectly configured.
z The multicast group policy is not correctly applied.