Alaxala AX2500S, Руководство по устранению неисправностей

Страница: 72 / 136

3 Troubleshooting Functional Failures During Operation
46
Table 3-19 Failure analysis method for multicast forwarding
No. Items to check and
commands Action
1 If multicast forwarding is not
performed, use the
show
logging
operation command to
check whether a failure has
occurred.
Check the following:
- Check whether log information about a physical fault has been
recorded.
2 Make sure filtering and QoS
control are configured correctly. Certain packets might have been discarded by filtering or packets
might have been discarded by the QoS control shaper. Make sure
that the setting conditions for filtering and QoS control in the
configuration are correct, and that the shaper is used appropriately in
the system configuration.
For details about the procedure, see 3.15.1 Checking the filtering and
QoS control configuration information .
3
If multicast forwarding is not
performed, use the
show
igmp-snooping
operation
command to check the IGMP
snooping configuration.
Check the following:
- To check whether the IGMP querier that monitors the group
members exists, make sure one of the following messages is
displayed:
(1) If the IGMP querier exists, the IP address of the IGMP querier is
displayed.
IGMP querying system: 192.168.11.20
#
(2) If the IGMP querier does not exist, nothing is displayed for
IGMP
querying system:
.
IGMP querying system:
- If the Switch is the IGMP querier, make sure the IP address has
been set for the VLAN.
(1) If the IP address has been set for the VLAN, the following
message is displayed:
IP Address: 192.168.11.20 *
(2) If the IP address has not been set for the VLAN, nothing is
displayed for
IP Address:
.
IP Address:
- If a multicast router is connected, check the mrouter-port setting.
> show igmp-snooping 3253
Date 2010/08/14 15:59:14 UTC
VLAN counts: 3
VLAN 3253:
IP Address: 192.168.53.100/24 Querier: enable
IGMP querying system: 192.168.53.100
Port (4): 0/13-16
Mrouter-port: 0/13-16
Group counts: 5
4 If multicast forwarding is not
performed, use the
show
igmp-snooping group
operation command to check the
IPv4 multicast group address.
Check the following:
- Make sure the joined IPv4 multicast group address is displayed by
the
show igmp-snooping group
command.
> show igmp-snooping group 3253
Date 2010/08/14 16:02:03 UTC
Total Groups: 15
VLAN counts: 3
VLAN 3253 Group counts: 5
Group Address MAC Address
230.0.0.11 0100.5e00.000b
Port-list: 0/13
230.0.0.10 0100.5e00.000a
Port-list: 0/13