3Com MSR 50 Network Router User Manual


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1348 CHAPTER 88: IGMP CONFIGURATION COMMANDS
display igmp routing-table
Syntax display igmp [ vpn-instance vpn-instance-name | all-instance ] routing-table
[ source-address [ mask { mask | mask-length }] | group-address [ mask { mask |
mask-length }]] *
View Any view
Parameter vpn-instance-name: VPN instance name, a case sensitive string of up to 31
characters.
all-instance: Specifies all VPN instances.
source-address: Multicast source address.
group-address: Multicast group address, in the range of 224.0.1.0 to
239.255.255.255.
mask: Subnet mask of the multicast group/source address, 255.255.255.255 by
default.
mask-length: Subnet mask length of the multicast group/source address. For a
multicast source address, this argument has an effective value range of 0 to 32; for
a multicast group address, this argument has an effective value range of 4 to 32.
The system default is 32 in both cases.
Description Use the
display igmp routing-table command to view the IGMP routing table
information.
Example # View IGMP routing table information in the public instance.
<Sysname> display igmp routing-table
Routing table of VPN-Instance: public net
Total 2 entries
00001. (*, 225.1.1.1)
List of 1 downstream interface
Ethernet1/0 (20.1.1.1),
Protocol: STATIC
00002. (*, 239.255.255.250)
List of 1 downstream interface
Ethernet1/0 (20.20.20.20),
Protocol: IGMP
Table 330 Description on the fields of the display igmp routing-table command
Field Description
00001 Sequence number the (*, G) entry
(*, 225.1.1.1) A (*, G) entry of the IGMP routing table
List of 1 downstream interface Downstream interface list: these interfaces need to
forward multicast packets