5.6.5 Checking the Configuration
After the control parameters for prune are adjusted, you can check information about the PIM
interface and the PIM routing table and statistics about PIM control messages through
commands.
Procedure
l Run the display pim [ vpn-instance vpn-instance-name | all-instance ] interface
[ interface-type interface-number | up | down ] [ verbose ] command to check information
about PIM on an interface.
l Run the display pim [ vpn-instance vpn-instance-name | all-instance ] control-message
counters [ message-type { assert | graft | graft-ack | hello | join-prune | state-refresh |
bsr } | interface interface-type interface-number ]
*
command to check the number of sent
or received PIM control packets.
l Run the following commands to check the PIM routing table.
– display pim { vpn-instance vpn-instance-name | all-instance } routing-table [ group-
address [ mask { group-mask-length | group-mask } ] | source-address [ mask { source-
mask-length | source-mask } ] | incoming-interface { interface-type interface-
number | register } | outgoing-interface { include | exclude | match } { interface-type
interface-number | register | none } | mode { dm | sm | ssm } | flags flag-value | fsm ]
*
[ outgoing-interface-number [ number ] ]
– display pim routing-table [ group-address [ mask { group-mask-length | group-
mask } ] | source-address [ mask { source-mask-length | source-mask } ] | incoming-
interface { interface-type interface-number | register } | outgoing-interface
{ include | exclude | match } { interface-type interface-number | vpn-instance vpn-
instance-name | register | none } | mode { dm | sm | ssm } | flags flag-value | fsm ]
*
[ outgoing-interface-number [ number ] ]
– display pim [ vpn-instance vpn-instance-name | all-instance ] routing-table brief
[ group-address [ mask { group-mask-length | group-mask } ] | source-address
[ mask { source-mask-length | source-mask } ] | incoming-interface { interface-type
interface-number | register } ]
*
----End
5.7 Adjusting Control Parameters for State-Refresh
In a PIM-DM network, the periodic flooding-pruning wastes lots of network resources. To
prevent the pruned interface from forwarding messages because the prune timer times out, you
can enable the State-Refresh function. The multicast device then sends State-Refresh messages
periodically to refresh the prune state of the interface and maintain the SPT.
5.7.1 Establishing the Configuration Task
After basic functions of PIM-DM are configured, you can set the interval for sending State-
Refresh messages, period for waiting to receive the next State-Refresh message, and TTL value
carried in the State-Refresh message as required.
Applicable Environment
In a PIM-DM network, periodical flooding-prune wastes a lot of network resources. To prevent
a pruned interface from forwarding packets, you can enable the State-Refresh function.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 5 PIM-DM (IPv4) Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
123
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