166
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, P-PIM 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.
Eth1/1 (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.
Eth1/4 (D)
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 1 port.
Eth1/4
Troubleshooting IGMP snooping
This section describes common IGMP snooping problems and how to troubleshoot them.
Layer 2 multicast forwarding cannot function
Symptom
Layer 2 multicast forwarding cannot function.
Analysis
IGMP snooping is not enabled.
Solution
1.
Use 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 in system view to enable IGMP
snooping globally, and then use the
igmp-snooping enable
command in VLAN view to enable
IGMP snooping for the VLAN.
3.
If IGMP snooping is enabled globally but not enabled for the VLAN, use the
igmp-snooping enable
command in VLAN view to enable IGMP snooping for the VLAN.
Appendix
Processing of multicast protocol messages
With Layer 3 multicast routing enabled, an IGMP snooping-enabled router processes multicast protocol
messages differently under different conditions, as follows:
