H3C S3600 Series User Manual

Operation Manual – Multicast
H3C S3600 Series Ethernet Switches-Release 1510 Chapter 6 IGMP Configuration
6-4
3) Up receiving this group-specific query, each of the other members of that group, if
any, will send a membership report within the maximum response time specified in
the query.
4) If the querier receives a membership report sent by any member of the group
within the maximum response time, it will maintain the memberships of that group;
otherwise, the querier will assume that there is no longer any member of that
group on the subnet and will stop maintaining the memberships of the group.
6.1.5 IGMP Proxy
A lot of leaf networks (leaf domains) are involved in the application of a multicast routing
protocol (PIM-DM for example) over a large-scaled network. It is a hard work to
configure and manage these leaf networks.
To reduce the workload of configuration and management without affecting the
multicast connection of leaf networks, you can configure an IGMP Proxy on a Layer 3
switch in the leaf network (Switch B shown in
Figure 6-2). The Layer 3 switch will then
forward IGMP join or IGMP leave messages sent by the connected hosts. After IGMP
Proxy is configured, the leaf switch is no longer a PIM neighbor but a host for the
external network. The Layer 3 switch receives the multicast data of corresponding
groups only when it has directly connected members.
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Host
Exterior network
Leaf network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave message
VLAN-interface 1
VLAN-interface 2
General group/
Group-Specific Query message
IGMP
join / leave
message
VLAN-interface 1
33.33.33.1
33.33.33.2
22.22.22.1
Switch A
Switch B
Host
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Host
Exterior network
Leaf network
General group/ Group -Specific Query information
Host
Exterior network
Leaf network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave message
General group/
Group-Specific Query message
IGMP
join / leave
message
33.33.33.1
33.33.33.2
22.22.22.1
Switch A
Switch B
Host
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Host
Exterior network
Leaf network
General group/ Group -Specific Query information
Host
Exterior network
Leaf network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave message
VLAN-interface 1
VLAN-interface 2
General group/
Group-Specific Query message
IGMP
join / leave
message
VLAN-interface 1
33.33.33.1
33.33.33.2
22.22.22.1
Switch A
Switch B
Host
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Exterior network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave information
Host
Exterior network
Leaf network
General group/ Group -Specific Query information
Host
Exterior network
Leaf network
General group/ Group -Specific Query information
IGMP join/ IGMP
leave message
General group/
Group-Specific Query message
IGMP
join / leave
message
33.33.33.1
33.33.33.2
22.22.22.1
Switch A
Switch B
Host
Figure 6-2 Diagram for IGMP Proxy
Figure 6-2 shows an IGMP Proxy diagram for a leaf network.
Configure Switch B as follows:
z Enable multicast routing on VLAN-interface1 and VLAN-interface2, and then
configure the PIM protocol on it. And configure the IGMP protocol on
VLAN-interface1 at the same time.

H3C S3600 Series Specifications

General

Brand	H3C
Model	S3600 Series
Category	Switch
Language	English