HP 5500 Ei 5500 Si Switch Series Configuration Guide

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[SwitchA-Vlan-interface101] pim sm 
[SwitchA-Vlan-interface101] quit 
[SwitchA] interface vlan-interface 102 
[SwitchA-Vlan-interface102] pim sm 
[SwitchA-Vlan-interface102] quit 
The configuration on Switch B and Switch C is similar to that on Switch A. The configuration on 
Switch D and Switch E is also similar to that on Switch A except that it is not necessary to enable 
IGMP on the corresponding interfaces on these two switches. 
3. Configure the SSM group range: 
# Configure the SSM group...

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[SwitchD] display pim routing-table 
 VPN-Instance: public net 
 Total 0 (*, G) entry; 1 (S, G) entry 
 
 (10.110.5.100, 232.1.1.1) 
     Protocol: pim-ssm, Flag: LOC 
     UpTime: 00:12:05 
     Upstream interface: Vlan-interface300 
         Upstream neighbor: NULL 
         RPF prime neighbor: NULL 
     Downstream interface(s) information: 
     Total number of downstreams: 1 
         1: Vlan-interface105 
             Protocol: pim-ssm, UpTime: 00:12:05, Expires: 00:03:25 
Troubleshooting PIM...

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Solution 
1. Use the  display ip routing-table  command to verify that a unicast ro ute exists from the receiver host 
to the multicast source. 
2.  Use the  display pim interface  command to verify that PIM is enabl ed on the interfaces, especially 
on the RPF interface. If PIM is not enabled on the interface, use the  pim dm or pim sm command to 
enable PIM-DM or PIM-SM. 
3.  Use the  display pim neighbor  command to verify that the RPF neighbor is a PIM neighbor. 
4. Verify that PIM and IGMP are...

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Analysis 
•  As the core of a PIM-SM domain, the RPs serve specific multicast groups. Multiple RPs can coexist 
in a network. Make sure that the RP information on all routers is exactly the same and that a specific 
group is mapped to the same RP. Otherwise, multicast forwarding will fail. 
•   If the static RP mechanism is used, the same static RP command must be executed on all the routers 
in the entire network. Otherwise, multicast forwarding will fail. 
Solution 
1. Use the  display ip...

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Configuring MSDP (available only on the HP 
5500 EI) 
Overview 
Multicast source discovery protocol (MSDP) is an inter-domain multicast solution that addresses the 
interconnection of protocol independent multicast s parse mode (PIM-SM) domains. You can use it to 
discover multicast source information in other PIM-SM domains. 
In the basic PIM-SM mode, a multicast source registers only with the RP in the local PIM-SM domain, and 
the multicast source information about a domain is isol ated from...

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Figure 56 Where MSDP peers are in the network 
 
 
As shown in Figure 56, an M SDP peer can be created on any PIM-SM router. MSDP peers created on 
PIM-SM routers that assume different roles function differently.  
1.  MSDP peers on RPs include the following types: 
{  Source-side MSDP peer —The MSDP peer nearest to the multicast source (Source), typically the 
source-side RP, like RP 1. The source-side RP creates SA messages and sends the messages to 
its remote MSDP peer to notify the MSDP peer...

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Figure 57 Inter-domain multicast delivery through MSDP 
 
 
The process of implementing PIM-SM inter-domain multicast delivery by leveraging MSDP peers is as 
follows:  
1. When the multicast source in PIM-SM 1 sends the first multicast packet to  multicast group G, DR 1 
encapsulates the multicast data within a register  message and sends the register message to RP 1. 
Then, RP 1 identifies the information related to the multicast source.  
2.  As the source-side RP, RP 1 creates SA messages  and...

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{ If no receivers for the group exist in the domain, RP 2 neither creates an (S, G) entry nor joins 
the SPT rooted at the source.  
 
  NOTE: 
When using MSDP for inter-domain multicasting, once an RP receives information form a multicast source,
it no longer relies on RPs in other PIM-SM domains.  The receivers can override the RPs in other domains
and directly join the multicast source-based SPT.  
 
RPF check rules for SA messages 
As shown in Figure 58 , the autonomous systems in the network...

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B e c a u s e  t h e  S A  m e s s a g e  i s  f r o m  a n  M S D P  p e e r  ( R P  3 )  i n  t h e  s a m e  m e s h  g r o u p ,  R P  4  a n d  R P  5  b o t h  
accept the SA message, but they do not forward the message to other members in the mesh group. 
Instead, they forward it to other MSDP peers (R P 6 in this example) out of the mesh group.  
4. When RP 6 receives the SA messages from RP 4  and RP 5 (suppose RP 5 has a higher IP address): 
Although RP 4 and RP 5 are in the same AS (AS...

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The work process of Anycast RP is as follows: 
1. The multicast source registers with the nearest RP. In  this example, Source registers with RP 1, with 
its multicast data encapsulated in the register me ssage. When the register message arrives at RP 
1, RP 1 de-encapsul ates the message.  
2. Receivers send join messages to the nearest RP to join  i n  t h e  R P T  r o o t e d  a s  t h i s  R P .  I n  t h i s  e x a m p l e ,  
Receiver joins the RPT rooted at RP 2.  
3.  RPs share the...