HP 5500 Ei 5500 Si Switch Series Configuration Guide

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Task   Remarks  
Enabling the IGMP host tracking function  Optional 
Setting the DSCP value for IGMP messages Optional 
Configuring IGMP SSM 
mapping Enabling SSM mapping 
Optional 
Configuring SSM mappings Optional 
Configuring IGMP proxying Enabling IGMP proxying 
Optional Configuring multicast forwarding on a 
downstream interface Optional 
 
For the configuration tasks in this section:  
In IGMP view, the configuration is effective on all 
interfaces. In interface view, the configuration is...

 96 
 
Enabling IGMP in a VPN instance 
 
Step  Command  Remarks  
1.  Enter system view. 
system-view  N/A
 
2.  Create a VPN instance and 
enter VPN instance view.  ip vpn-instance 
vpn-instance-name N/A 
3.  Configure an RD for the VPN 
instance.  route-distinguisher 
route-distinguisher
  No RD is configured by default. 
4.
  Enable IP multicast routing. 
multicast routing-enable  Disabled by default.  
5.  Enter interface view.  interface 
interface-type 
interface-number   N/A
 
6.  Bind the...

 97 
Configuring static joining 
Configuration guidelines 
After an interface is configured as a static member of  a multicast group or a multicast source group, it will 
act as a virtual member of the multicast group to receive multicast data addressed to that multicast group 
for the purpose of testing multicast data forwarding.  
Before you can configure an interface of a PIM-SM switch as a static member of a multicast group or a 
multicast source and group, if the interface is PIM-SM  enabled, it...

 98 
Setting the maximum number of  multicast groups that an 
interface can join 
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2.  Enter interface view.  interface 
interface-type 
interface-number   N/A 
3.
  Configure the maximum 
number of multicast groups 
that the interface can join.  igmp group-limit 
limit  2000 by default.  
 
 NOTE: 
This configuration takes effect for dynamically joined  multicast groups but not for statically configured 
multicast groups. 
 
Adjusting...

 99 
interface for the destination multicast group, it must use the Router-Alert option to pass the multicast 
packet to the upper-layer protocol for processing. For  more information about the Router-Alert option, see 
RFC 21 13 .   
An IGMP message is processed differently depending on  whether it carries the Router-Alert option in the 
IP header:  
•   By default, for the consideration of compatibility, the switch does not verify the Router-Alert option 
but processes all the IGMP messages that it...

 100 
After startup, the IGMP querier periodically send s IGMP general queries at the IGMP general query 
interval to check for multicast group members on the network. You can modify the IGMP general query 
interval based on actual condition of the network.  
The IGMPv2 querier sends IGMP group-specific queries at the IGMP last-member query interval when it 
receives an IGMP leave message. The IGMPv3 querier sends IGMP group-and-source-specific queries at 
the IGMP last-member query interval when it...

 101 
Step  Command  Remarks  
6.  Configure the IGMP general 
query interval.   timer query
 interval
  60 seconds by default. 
 
7.  Configure the maximum 
response time for IGMP 
general queries.  max-response-time 
interval
  10 seconds by default. 
 
8.  Configure the IGMP 
last-member query interval.  last-member-query-interval
 
interval   1 second by default. 
 
9.  Configure the other querier 
present interval.   timer other-querier-present 
interval
  By default, the other querier 
present...

 102 
frequently from one multicast group to another, you  c a n e n ab l e  I GM P  fas t - l e ave  p ro c ess i ng  o n  t h e  I GM P  
querier.  
With fast-leave processing enabled, after receiving an IGMP leave message from a host, the IGMP 
querier directly sends a leave notification to the upstream without sending IGMP group-specific queries 
or IGMP group-and-source-specific queries. Thus,  the leave latency is reduced on one hand, and the 
network bandwidth is saved on the other hand....

 103 
Step Command Remarks 
3.  Enable the IGMP host 
tracking function globally.  host-tracking 
Disabled by default 
 
Enabling the IGMP host tracking function on an interface 
 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter interface view. 
interface interface-type interface-number N/A 
3.  Enable the IGMP host 
tracking function on the 
interface.  igmp host-tracking 
Disabled by default 
 
Setting the DSCP value for IGMP messages  
Step Command Remarks  
1.  Enter system...

 104 
  NOTE: 
To ensure SSM service for all hosts on a subnet, re gardless of the IGMP version running on the hosts, 
enable IGMPv3 on the interface that forw ards multicast traffic onto the subnet. 
 
Configuring SSM mappings 
By performing this configuration multiple times,  you can map a multicast group to different multicast 
sources. 
If IGMPv3 is enabled on a VLAN interface of a switch , and if a port in that VLAN is configured as a 
simulated host, the simulated host will send IGMPv3 re ports...