Mypower
S4100
Troubleshooting
Maipu Confidential & Proprietary Information
Page
32
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124
The unicast is not
connected.
If the receiver (set with the IP address that is in the same
segment as the router) cannot ping the interface of the uplink
router, first remove the problem that the unicast is
disconnected. You can view the physical lines, port status and
VLAN attribute to get rid of the unicast fault (refer to the
related troubleshooting manuals).
IGMP Snooping is not
enabled or the version is
inconsistent.
Execute the show run igmp snooping command on the
switch to view the configuration, whether IGMP Snooping is
enabled globally and in VLAN. Execute the show ip igmp
snooping vlan xx info command to view the snooping
configuration information of the specified VLAN, whether it is in
the enable state.
If the above configurations are all correct, maybe the snooping
version is wrong. Confirm the IGMP versions used by router
(the IGMP version of the interface viewed by the show ip
igmp interface command), switch and receiver (use the
software to capture packets to view the IGMP version) are
consistent.
The port is set with the
maximum limitation groups.
Use the show ip igmp snooping group command on the
switch to view that the information of the multicast group is
not added on the port, but there is the information about the
group on other ports.
Use the show run command to view that the maximum
limitation group is set on the port. As a result, the groups that
need to receive cannot register as the member port to receive
packets. For example:
port 0/11
port-type nni
ip igmp max-groups 0
exit
(As shown above, port 0/11 needs to receive the service
packets of 224.0.1.12, but there is the maximum group
limitation on port, so the service packets cannot be received.
Note that the maximum limitation group do not need to be set
as 0, but when the learned multicast groups reach the
maximum limitation, the new multicast groups cannot be
learned).
IGMP profile filters the
corresponding multicast
groups.
Use the show run command on the switch to view that the
port is configured with ip igmp filter 1, as follows:
port 0/20
ip igmp filter 1
exit
Use the show ip igmp profile command to view the
corresponding rules, as follows:
switch#show ip igmp profile
IGMP profile 1:
----------------
deny
range 224.0.1.1 224.0.1.255
The port 0/20 cannot receive the service packets from
224.0.1.1 to 224.0.1.255.
The L2 static multicast
forbidden port is configured.
Execute the show ip igmp snooping group command to
view the multicast entries, while the multicast flow still cannot
be received. Maybe L2 static multicast forbidden port is
configured. Use the show l2-multicast mac-entry static
command to view whether the port of the receiver is forbidden.
If yes, the configuration needs to be deleted.
