R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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Static port configuration example
Network requirements
As shown in Figure 15, IGMPv2 runs on Router A, and IGMPv2 snooping runs on Router B, Router C, and
Router D, with Router A acting as the IGMP querier. Router B, Router C, and Router D are the HSR6800
routers.
Host A and host C are permanent receivers of multicast group 224.1.1.1. GigabitEthernet 2/0/3 and
GigabitEthernet 2/0/5 on Router D should be configured as static member ports for multicast group
224.1.1.1 to enhance the reliability of multicast traffic transmission.
Suppose the STP runs on the network. To avoid data loops, the forwarding path from Router B to Router
D is blocked under normal conditions, and multicast traffic flows to the receivers attached to Router D
only along the path of Router B—Router C—Router D. For more information about STP, see Layer 2—LAN
Switching Configuration Guide.
Configure GigabitEthernet 2/0/3 on Router B as a static router port, so that multicast traffic can flow to
the receivers nearly uninterruptedly along the path of Router B—Router D in the case that the path of
Router B—Router C—Router D is blocked.
NOTE:
If no static router port is configured, multicast transmission is interrupted for a while after the path of Router B—Router
C—Router D is blocked. The reason is that at least one IGMP query/response exchange is required before the new
path can forward multicast packets.
Figure 15 Network diagram
Source
1.1.1.1/24
Router A
IGMP querier
Eth1/1
10.1.1.1/24
Router B
Router C
Router D
GE2/0/1
GE
2
/
0
/
2
GE
2
/
0
/
3
G
E
2
/
0
/
1
GE
2
/
0
/
1
G
E
2
/
0
/
3
G
E
2
/
0
/
5
Host A
Receiver
Host B
Host C
Receiver
VLAN 100
Eth1/2
1.1.1.2/24