HP 5500 Ei 5500 Si Switch Series Configuration Guide

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MLD proxying 
In some simple tree-shaped topologies, you do not need to configure complex IPv6 multicast routing 
protocols, such as IPv6 PIM, on the boundary devices. Instead, you can configure MLD proxying on these 
devices. With MLD proxying configured, the device serves as a proxy for the downstream hosts to send 
MLD messages, maintain group memberships, and implement IPv6 multicast forwarding based on the 
memberships. In this case, the MLD proxy device is a host but no longer an IPv6 PIM...

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•  RFC 4605,  Internet Group Management Protocol (IGMP) /Multicast Listener Discovery (MLD) -Based 
Multicast Forwarding (IGMP/MLD Proxying)  
MLD configuration task list 
 
Task  Remarks 
Configuring basic MLD functions  Enabling MLD 
Required
 
Configuring the MLD version  Option
 
Configuring static joining  Optional
 
Configuring an IPv6 multicast group filter  Optional
 
Setting the maximum number of IPv6 multicast 
groups that an interface can join  Optional
 
Adjusting MLD performance...

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•  Determine the IPv6 multicast group address and IPv6 multicast source address for static group 
member configuration. 
•   Determine the ACL rule for IPv6 multicast group filtering. 
•   Determine the maximum number of IPv6 multicast groups that an interface can join. 
Enabling MLD 
Enable MLD on the interface on which IPv6 multicast group memberships will be created and 
maintained. 
To  e n ab l e  M L D :  
 
Step  Command  Remarks 
1.  Enter system view. 
system-view  N/A
 
2.  Enable IPv6...

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Configuring static joining 
After an interface is configured as a static member of an IPv6 multicast group or an IPv6 multicast source 
and group, it will act as a virtual member of the IPv6 multicast group to receive IPv6 multicast data 
addressed to that IPv6 multicast group for the purpose of testing IPv6 multicast data forwarding. 
Configuration guidelines 
Before you can configure an interface of an IPv6 PIM-SM device as a static member of an IPv6 multicast 
group or an IPv6 multicast source...

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Setting the maximum number of IPv6 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 
IPv6 multicast groups that the 
interface can join.  mld group-limit 
limit  1000 by default.  
 
 NOTE: 
This configuration takes effect for dynamically join ed IPv6 multicast groups but not the statically 
configured multicast groups....

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multicast groups that have no members on the local subnet. In this case, the Router-Alert option carried 
in the IPv6 multicast packets is useful for the router to determine whether to deliver the IPv6 multicast 
packets to the upper-layer protocol for processing. For more information about the Router-Alert option, 
see RFC 21 13 .  
An MLD message is processed differently depending on  whether it carries the Router-Alert option in the 
IPv6 header, as follows: 
•   For compatibility, the device by...

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After startup, the MLD querier periodically sends MLD general queries at the MLD query interval to check 
for IPv6 multicast group members on the network. You  can modify the query interval based on the actual 
condition of the network. 
The MLDv1 querier sends MLD multicast-address-specific  queries at the MLD last listener query interval 
when it receives an MLD done message. The MLDv2 querier sends MLD 
multicast-address-and-source-specific queries at the MLD last listener query interval when it...

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Step Command  Remarks 
6.  Configure the MLD query 
interval.   timer query
 interval   125 seconds by default.
 
7.  Configure the maximum 
response delay for MLD 
general query messages.  max-response-time
 interval   10 seconds by default.
 
8.  Configure the MLD last 
listener query interval.  last-listener-query-interval 
interval 1 second by default. 
9.  Configure the MLD other 
querier present interval.  timer other-querier-present
 
interval   By default, the other querier 
present...

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Configuring MLD fast-leave processing 
In some applications, such as ADSL dial-up networking, only one multicast receiver host is attached to a 
port of the MLD querier. To allow fast response to the MLD done messages of the host when it switches 
frequently from one IPv6 multicast group to another, you can enable MLD fast-leave processing on the 
MLD querier.  
With fast-leave processing enabled, after receiving an MLD done message from a host, the MLD querier 
sends a leave notification to the...

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Enabling the MLD 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 MLD host tracking 
function on the interface.  mld host-tracking 
Disabled by default 
 
Setting the DSCP value for MLD messages  
Step Command Remarks  
1.  Enter system view. 
system-view  N/A 
2.  Enter MLD view.  
mld  N/A 
3.  Set the DSCP value for MLD 
messages.   dscp
 dscp-value...