3com 3031 Instruccion De Instalación
IGMP Configuration
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Figure 145 IGMP Proxy diagram
Figure 145 is a diagram for a leaf network.
First of all, configure Ethernet1/0/0 interface on the Ethernet0/0/0 interface of
Router B as the outbound IGMP proxy interface to the exterior network (by
configuring the
Router B as the outbound IGMP proxy interface to the exterior network (by
configuring the
igmp proxy
command).
Then configure
pim neighbor-policy
on Ethernet0/0/0 interface of Router A to
filter PIM neighbor of network segment 33.33.33.0/24, i.e., Router A does not
consider Router B as its PIM neighbor (it is not necessary to configure the
command if PIM-DM is disabled on Router B).
consider Router B as its PIM neighbor (it is not necessary to configure the
command if PIM-DM is disabled on Router B).
In this case, when Router B of leaf network receives from Ethernet 0/0/0 interface
an IGMP join or IGMP leave messages sent by the host, it will change the source
address of the IGMP information to the outbound interface address to Router A
(Ethernet1/0/0 interface address: 33.33.33.2) and send the information to
Ethernet0/0/0 interface of Router A. This works as if there is a host directly
connected to Ethernet 0/0/0 interface of Router A. Similarly, when Router B
receives the general group or group-specific query message from Router A, it will
also change the source address of the query message to the outbound interface
address of the host (Ethernet0/0/0 interface address: 22.22.22.1) and send the
information from Ethernet0/0/0 interface.
an IGMP join or IGMP leave messages sent by the host, it will change the source
address of the IGMP information to the outbound interface address to Router A
(Ethernet1/0/0 interface address: 33.33.33.2) and send the information to
Ethernet0/0/0 interface of Router A. This works as if there is a host directly
connected to Ethernet 0/0/0 interface of Router A. Similarly, when Router B
receives the general group or group-specific query message from Router A, it will
also change the source address of the query message to the outbound interface
address of the host (Ethernet0/0/0 interface address: 22.22.22.1) and send the
information from Ethernet0/0/0 interface.
In Figure 145, Ethernet0/0/0 interface of Router B is called the client and
Ethernet1/0/0 interface of Router B is called the proxy.
Ethernet1/0/0 interface of Router B is called the proxy.
IGMP Configuration
After multicast is enabled, IGMP must be enabled on the interface before other
IGMP configurations.
IGMP configurations.
Basic configuration tasks of IGMP include:
■
Enable multicast
Ex terior netw ork
General group/ Group-Specific Query information
IGMP join/ IGMP
leav e information
Ethernet1/0/0
Ethernet0/0/0
General group/ Group-Specific Query information
IGMP join / leav einformation
Ethernet0/0/0
33.33.33.1
33.33.33.2
22.22.22.1
Router A
Router B
Host
Ex terior netw ork
Leaf netw ork
General group/ Group-Specific Query information
IGMP join/ IGMP
leav e information
Ethernet1/0/0
Ethernet0/0/0
Ex terior netw ork
General group/ Group-Specific Query information
IGMP join/ IGMP
leav e information
Ethernet1/0/0
Ethernet0/0/0
General group/ Group-Specific Query information
IGMP join / leav einformation
Ethernet0/0/0
33.33.33.1
33.33.33.2
22.22.22.1
Router A
Router B
Host
Ex terior netw ork
General group/ Group-Specific Query information
IGMP join/ IGMP
leav e information
Ex terior netw ork
General group/ Group-Specific Query information
IGMP join/ IGMP
leav e information
Ethernet1/0/0
Ethernet0/0/0
General group/ Group-Specific Query information
IGMP join / leav einformation
Ethernet0/0/0
33.33.33.1
33.33.33.2
22.22.22.1
Router A
Router B
Host
Ethernet1/0/0
Ethernet0/0/0
General group/ Group-Specific Query information
IGMP join / leav einformation
Ethernet0/0/0
33.33.33.1
33.33.33.2
22.22.22.1
Router A
Router B
Host
Ex terior netw ork
Leaf netw ork
General group/ Group-Specific Query information
IGMP join/ IGMP
leav e information
Ethernet1/0/0
Ethernet0/0/0
Ex terior netw ork
Leaf netw ork
General group/ Group-Specific Query information
IGMP join/ IGMP
leav e information
Ethernet1/0/0
Ethernet0/0/0
Ex terior netw ork
General group/ Group-Specific Query information
IGMP join/ IGMP
leav e information
Ethernet1/0/0
Ethernet0/0/0
General group/ Group-Specific Query information
IGMP join / leav einformation
Ethernet0/0/0
33.33.33.1
33.33.33.2
22.22.22.1
Router A
Router B
Host