Inconsistent Memberships On Routers On The Same Subnet - H3C S3610 Series Operation Manual

Operation Manual – Multicast Protocol
H3C S3610&S5510 Series Ethernet Switches
III. Solution
1) Check that the networking is correct and interface connections are correct.
2) Check that the interfaces and the host are on the same subnet. Use the display
current-configuration interface command to view the IP addresses of the
interfaces.
3) Check
current-configuration
routing-enable command has been executed. If not, carry out the multicast
routing-enable command in system view to enable IP multicast routing. In
addition, check that IGMP is enabled on the corresponding interfaces.
4) Check that the interface is in normal state and the correct IP address has been
configured. Carry out the display igmp interface command to view the interface
information. If no interface information is output, this means the interface is
abnormal. Typically this is because the shutdown command has been executed
on the interface, or the interface connection is incorrect, or no correct IP address
has been configured on the interface.

5.7.2 Inconsistent Memberships on Routers on the Same Subnet

I. Symptom
Different memberships are maintained on different IGMP routers on the same subnet.
II. Analysis
A router running IGMP maintains multiple parameters for each interface, and these
parameters influence one another, forming very complicated relationships.
Inconsistent IGMP interface parameter configurations for routers on the same
subnet will surely result in inconsistency of memberships.
In addition, although IGMP routers are compatible with hosts, all routers on the
same subnet must run the same version of IGMP. Inconsistent IGMP versions
running on routers on the same subnet will also lead to inconsistency of IGMP
memberships.
III. Solution
1) Check the IGMP configuration. Carry out the display current-configuration
command to view the IGMP configuration information on the interfaces.
2) Carry out the display igmp interface command on all routers on the same subnet
to check the IGMP-related timer settings. Make sure that the settings are
consistent on all the routers.
3) Use the display igmp interface command to check whether the routers are
running the same version of IGMP.
that multicast routing
command
5-16
Chapter 5 IGMP Configuration
is enabled. Carry
to check whether
out the display
the multicast