Huawei quidway s7700 - Check RPF Paths and Multicast Paths; Clearing Multicast Routing and Forwarding Entries

l Run the ping multicast [ -c count | -h ttl-value | -m time | -p pattern | -q | -s packet(s)ize |
-t timeout | -tos tos-value | -v ]
*
host command in any view to ping a common group address.
----End
9.7.2 Check RPF Paths and Multicast Paths
When a fault occurs during multicast data transmission, you can run the mtrace command to
check the RPF path and multicast path.
Context
NOTE
When checking the RPF path or multicast path from a source to a destination host, run the mtrace query-
policy [ acl-number ] command on the switch connected to hosts to configure the filtering policy for
queriers. The ACL defines the address scope of reliable queriers. Based on the ACL, the last-hop switch
refuses the IGMP-Tracert-Query messages sent by illegal queriers. Note the following when using this
command:
l This command is valid only for the last-hop switch, and the querier is not the last-hop switch.
l This command is used to filter only the IGMP-Tracert-Query message encapsulated in a unicast IP
packet.
l This command is not applicable to the trace that is initiated by the local querier.
When a fault occurs during data transmission, you can run the following commands in any view
to check RPF paths and multicast paths.
Procedure
l Run the mtrace [ -ur resp-dest | -l [ stat-times ] [ -st stat-int ] | -m max-ttl | -q nqueries | -
ts ttl | -tr ttl | -v | -w timeout | -vpn-instance vpn-name ] * source source-address command
in any view to check the RPF path from a source to a querier.
l Run the mtrace -g group [ { -mr | -ur resp-dest } | -l [ stat-times ] [ -st stat-int ] | -m max-
ttl | -q nqueries | -ts ttl | -tr ttl | -v | -w timeout | -vpn-instance vpn-name ] * source source-
address command in any view to check the multicast path from a source to a querier.
l Run the mtrace { -gw last-hop-router | -d } -r receiver [ -ur resp-dest | -a source-ip-
address | -l [ stat-times ] [ -st stat-int ] | -m max-ttl | -q nqueries | -ts ttl | -tr ttl | -v | -w
timeout | -vpn-instance vpn-name ] * source source-address command in any view to
check the RPF path from a source to a destination host.
l Run the mtrace { -gw last-hop-router | -b | -d } -r receiver -g group [ { -mr | -ur resp-
dest } | -a source-ip-address | -l [ stat-times ] [ -st stat-int ] | -m max-ttl | -q nqueries | -ts
ttl | -tr ttl | -v | -w timeout | -vpn-instance vpn-name ] * source source-address command
in any view to check the multicast path from a source to a destination host.
----End
9.7.3 Clearing Multicast Routing and Forwarding Entries
After you confirm to clear multicast forwarding and routing entries, use the reset command in
the user view. After you run the reset command to clear information in the multicast forwarding
table and the multicast routing table, multicast data cannot be normally transmitted. So, confirm
the action before you use the command.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 9 IPv4 Multicast Routing Management
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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