The switch that fails in the election prevents the downstream interface from forwarding
multicast packets within the interval. After the interval expires, the downstream
interface starts to forward multicast packets.
l Configuration on the Interface
1. Run:
system-view
The system view is displayed.
2. Run:
interface interface-type interface-number
The interface view is displayed.
The interface can be a VLANIF interface, or an Loopback interface.
3. Run:
pim holdtime assert interval
The interval for holding the Assert state is configured.
The switch that fails in the election prohibits the downstream interface from
forwarding multicast packets within this interval. After the interval expires, the
downstream interface starts to forward multicast packets.
----End
6.10.3 Checking the Configuration
After the control parameters for assert 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 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 messages.
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-
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 6 PIM-SM (IPv4) Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
182
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