HP 5500 Ei 5500 Si Switch Series Configuration Guide

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 system-view 
[SwitchC] multicast routing-enable 
[SwitchC] interface vlan-interface 100 
[SwitchC-Vlan-interface100] igmp enable 
[SwitchC-Vlan-interface100] pim dm 
[SwitchC-Vlan-interface100] quit 
[SwitchC] interface vlan-interface 101 
[SwitchC-Vlan-interface101] pim dm 
[SwitchC-Vlan-interface101] quit 
# Enable IP multicast routing on Switch A and enable PIM-DM on each interface. 
 system-view 
[SwitchA] multicast routing-enable 
[SwitchA] interface vlan-interface 300...

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     Route selection rule: preference-preferred 
     Load splitting rule: disable 
The output shows that the RPF routes to Source 2 exist on Switch B and Switch C. The routes are the 
configured static routes.  
Troubleshooting multicast routing and forwarding  
Static multicast route failure 
Symptom 
No dynamic routing protocol is enabled on the routers,  and the physical status and link layer status of 
interfaces are both up, but the static multicast route fails. 
Analysis 
•   If the static...

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2.
 
Use the  display multicast boundary  command to check the multicast boundary information on the 
interfaces. Use the multicast boundary  command to change the multicast forwarding boundary 
setting. 
3.  In the case of PIM-SM, use the  display current-configuration command to check the BSR and RP 
information.  
  

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Configuring IGMP (available only on the HP 
5500 EI) 
Overview 
As a TCP/IP protocol responsible for IP multicast group member management, the Internet Group 
Management Protocol (IGMP) is used by IP hosts an d adjacent multicast routers to establish and maintain 
their multicast group memberships.  
The term router in this document refers to both routers and Layer 3 switches. 
The term interface in the IGMP features refers to Layer 3 interfaces, including VLAN interfaces and 
route-mode (or Layer...

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In IGMPv1, the designated router (DR) elected by the working multicast routing protocol (such as PIM) 
serves as the IGMP querier.  
For more information about DR, see  Configuring PIM (available only on the HP 5500 EI)   
Figure 31  IGMP queries and reports 

 
 
 
Assume that Host B and Host C are interested in multicast data addressed to multicast group G1, and 
Host A is interested in multicas t data addressed to G2, as shown in  Figure 31. T
he following process 
describes how the hosts join...

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that i t l istene d to. I f  no  member  exists  i n a mu l tic ast g roup on the  subnet, the  I GM P  router  wi l l  not re c eive 
any report addressed to that multicast group. In this  case, the router will delete the multicast forwarding 
entries for that multicast group after a period of time.  
Enhancements in IGMPv2 
Compared with IGMPv1, IGMPv2 has introduced a querier election mechanism and a leave-group 
mechanism.  
Querier election mechanism  
In IGMPv1, the DR elected by the Layer 3...

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Enhancements in contro l capability of hosts 
IGMPv3 introduced two source filtering modes—Includ e and Exclude. These modes allow a host to join 
a designated multicast group and to choose whether to  receive or reject multicast data from designated 
multicast sources. When a host joins a multicast group, one of the following situation occurs: 
•   If it needs to receive multicast data from specific sources like S1, S2, …, it sends a report with the 
Filter-Mode denoted as Include Sources (S1, S2,...

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Group records fall into the following categories: 
{ IS_IN —The source filtering mode is Include. The re port sender requests the multicast data from 
only the sources defined in the specified multicast source list. 
{  IS_EX—The source filtering mode is Exclude. The report sender requests the multicast data from 
any sources but those defined in the specified multicast source list.  
{ TO_IN —The filtering mode has changed from Exclude to Include. 
{ TO_EX —The filtering mode has changed from...

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As shown in  Figure 33, on an SSM network, Host A, Host B, and Host C are running IGMPv1, IGMPv2, 
and IGMPv3 respectively. To provide SSM service for all the hosts if IGMPv3 is not available on Host A 
and Host B, you must configure the IGMP SSM mapping feature on Router A. 
W i t h  t h e  I G M P  SS M  m a p p i n g  f e a t u re  c o n f i g u re d ,  w h e n  R o u t e r  A  r e c e i v e s  a n  I G M P v 1  o r  I G M P v 2  re p o r t,  
it checks the multicast group address G carried in...

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•  Upstream interface —Also called the proxy interface. A pro xy interface is an interface on which 
IGMP proxying is configured. It is in the direction toward the root of the multicast forwarding tree. 
An upstream interface acts as a host that is running IGMP. Therefore, it is also called the host 
interface.  
•   Downstream interface —An interface that is running IGMP an d is not in the direction toward the 
root of the multicast forwarding tree. A downstream interface acts as a router that is...