186 CHAPTER 7: MULTICAST PROTOCOL
Perform the following configuration in Interface view.
When there are multiple multicast routers on a network segment, the querier is
responsible for sending IGMP query messages to all hosts on the LAN.
By default, the interval is 60 seconds.
Deleting IGMP Groups Joined on an Interface
You can delete an existing IGMP group from the interface using the following
command.
Perform the following configuration in Interface view.
Displaying and
debugging IGMP
After the above configuration, execute display command in any view to display
the running of IGMP configuration, and to verify the effect of the configuration.
Execute debugging command in user view for the debugging of IGMP.
PIM-DM Overview PIM-DM (Protocol Independent Multicast, Dense Mode) belongs to dense mode
multicast routing protocols. PIM-DM is suitable for small networks. Members of
multicast groups are relatively dense in such network environments.
The working procedures of PIM-DM include neighbor discovery, flood & prune and
graft.
Table 199 Configuring the interval to send IGMP query message
Operation Command
Configure the interval to send IGMP query message igmp timer query
seconds
Restore the default value undo igmp timer query
Table 200 Deleting IGMP groups joined on an interface
Operation Command
Delete IGMP groups
joined on an interface
reset igmp group { all | interface
interface_type
interface_number
{ all |
group_address
[
group_mask
] } }
Table 201 Displaying and debugging IGMP
Operation Command
Display the information about
members of IGMP multicast
groups
display igmp group [
group_address
|
interface
interface_type interface_number
]
Display the IGMP configuration
and running information about
the interface
display igmp interface [
interface_type
interface_number
]
Enable the IGMP information
debugging
debugging igmp { all | event | host |
packet | timer }
Disable the IGMP information
debugging
undo debugging igmp { all | event | host |
packet | timer }
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