Troubleshooting Procedure
NOTE
Saving the results of each troubleshooting step is recommended. If your troubleshooting fails to correct
the fault, you will have a record of your actions to provide Huawei technical support personnel.
Procedure
Step 1 Check that multicast is enabled on the device.
Run the display current-configuration command on the device that is directly connected to
hosts to check the current configurations of the device.
l If the command output does not contain multicast routing-enable, run the multicast
routing-enable command in the system view to enable multicast on the device first and
then complete other IGMP configurations. For details, see the Huawei AR2200-S Series
Enterprise Routers Configuration Guide - Multicast.
l If multicast has been enabled on the device, go to Step 2.
Step 2 Check that the interface status is Up.
Run the display interface interface-type interface-number command on the device to check
configurations of the interface directly connected with the network segment of the hosts.
l If the command output contains interface-type interface-number current state:
DOWN, it indicates that the interface is physically Down. Then you need to check the
networking and ensure that the interface is properly connected.
l If the command output contains Line protocol current state : DOWN, it indicates that
the protocol status of the interface is Down. Then you need to perform the following
operations:
– Check whether the interface is in shutdown state.
Run the display current-configuration interface interface-type interface-number
command to check the current configurations of the interface. If the command output
contains shutdown, run the undo shutdown command in the interface view.
– Check whether an IP address is configured for the interface.
Run the display current-configuration interface interface-type interface-number
command to check the IP address of the interface. If no IP address is configured for the
interface or the configured IP address is on a different network segment from the hosts,
run the ip address ip-address { mask | mask-length } to reconfigure an IP address for
the interface and ensure that the IP address is on the same network segment with those
of the hosts.
l If the interface status is Up, go to Step 3.
Step 3 Check that IGMP is enabled on the interface.
Run the display current-configuration interface interface-type interface-number command to
check the current configurations of the interface that is directly connected with the hosts.
l If the command output does not contain igmp enable, it indicates that IGMP is not enabled
on the interface. Run the igmp enable command in the interface view to enable IGMP.
l If IGMP has been enabled on the interface, go to Step 4.
Step 4 Check whether the multicast group G of the EXCLUDE message is in the SSM group address
range.
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 8 Multicast
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
228
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