HP 5500 Ei 5500 Si Switch Series Configuration Guide

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Figure 67 Network diagram 
 
 
As shown in Figure 67, Switch A works as an MLD snooping proxy. As a host from the perspective of the 
querier Router A, Switch A represents its attached  hosts to send their membership reports and done 
messages to Router A.  
Tabl e  8  de
scribes how an MLD snooping proxy processes MLD messages.  
Table 8 MLD message processing on an MLD snooping proxy 
MLD messa
ge Actions 
General query  When receiving an MLD general query, the pro
xy forwards it to all ports but...

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Protocols and standards 
RFC 4541, Considerations for Internet Group Management Protocol (IGMP) and Multicast Listener 
Discovery (MLD) Snooping Switches   
MLD snooping configuration task list 
 
Task  Remarks  
Configuring basic MLD 
snooping functions  Enabling MLD snooping 
Required Specifying the version of MLD snooping Optional 
Configuring IPv6 static multicast MAC address entries Optional 
Configuring MLD snooping port 
functions Configuring aging timers for dynamic ports 
Optional...

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•  In MLD-snooping view, configurations that you make are effective on all ports. In Layer 2 Ethernet 
interface view or Layer 2 aggregate interface view,  configurations that you make are effective only 
on the current port. In port group view, configurations  that you make are effective on all ports in only 
the current port group. For a given port, a configuration that you make in MLD-snooping view is 
effective only if you do not make the same configuration in Layer 2 Ethernet interface view,...

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Specifying the version of MLD snooping 
Configuration guidelines 
Different versions of MLD snooping can process different versions of MLD messages: 
•  MLDv1 snooping can process MLDv1 messages, but  flood MLDv2 messages in the VLAN instead 
of processing them. 
•   MLDv2 snooping can process MLDv1 and MLDv2 messages. 
If you change MLDv2 snooping to MLDv1 snooping, the system clears all MLD snooping forwarding 
entries that are dynamically created, and also does the following:  
•   Keeps static...

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To configure an IPv6 static multicast MAC address entry in interface view:  
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter Layer 2 Ethernet 
interface view, Layer 2 
aggregate interface view, or 
port group view. 
• Enter Layer 2 Ethernet interface 
view or Layer 2 aggregate 
interface view: 
interface  interface-type 
interface-number 
•  Enter port group view: 
port-group  manual 
port-group-name   In Ethernet interface view or Layer 
2 aggregate interface view, the...

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Step Command Remarks 
4.  Set the global aging timer for 
dynamic member ports.  host-aging-time
 interval   260 seconds by default 
 
Setting the aging timers for the dynamic ports in a VLAN 
 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter VLAN view. 
vlan vlan-id   N/A 
3.  Set the aging timer for the 
dynamic router ports.  mld-snooping router-aging-time 
interval
  260 seconds by default 
4.
  Set the aging timer for the 
dynamic member ports.  mld-snooping...

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Step Command Remarks 
4.  Configure the port as a static 
router port.   mld-snooping static-router-port 
vlan vlan-id
  No static router ports exist by 
default. 
 
Configuring a port as a simulated member host 
Generally, a host that runs MLD can respond to MLD queries. If a host fails to respond, the multicast router 
might deem that the IPv6 multicast group has no members on the subnet, and removes the corresponding 
forwarding path.  
To avoid this situation, you can configure a port on the...

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On a port that has only one host attached, you can enable fast-leave processing to save bandwidth and 
resources. However, on a port that has multiple hosts attached, you should not enable fast-leave 
processing if you have enabled dropping unknown IPv6 multicast data globally or for the port. 
O t h e r wi s e,  i f  a  h o s t  o n  t h e  p o r t  l e ave s  a n  I P v 6  m u l t ic as t  g ro u p,  t h e  o t h e r  h o s t s  a t t a ch e d  t o  t h e  p o r t  i n  t h e  
same IPv6...

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Step Command Remarks  
2.  Enter Layer 2 Ethernet 
interface view, Layer 2 
aggregate interface view, or 
port group view.  
• Enter Layer 2 Ethernet interface 
view or Layer 2 aggregate 
interface view: 
interface  interface-type  
interface-number  
• Enter port group view: 
port-group  manual 
port-group-name   Use either command.
 
3.  Disable the port from 
becoming a dynamic router 
port.   mld-snooping router-port-deny 
[
 vlan  vlan-list  ]   By default, a port can become a 
dynamic router...

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To enable the MLD snooping querier:   
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter VLAN view. 
vlan vlan-id   N/A 
3.  Enable the MLD snooping 
querier.  mld-snooping querier 
Disabled by default 
 
Configuring parameters for MLD queries and responses 
Configuration guidelines 
You can modify the MLD general query interval based on the actual condition of the network.  
A multicast listening host starts a timer for each IPv6 multicast group that it has joined when it...