HP 5500 Ei 5500 Si Switch Series Configuration Guide

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Perform the following configurations on all routers in the PIM domain.  
To configure state-refresh parameters:  
 
Step Command  Remarks  
1.  Enter system view. 
system-view N/A 
2.  Enter public network PIM view or 
VPN instance PIM view.  pim
 [ vpn-instance 
vpn-instance-name  ]  N/A 
3.
  Configure the interval between 
state-refresh messages.  state-refresh-interval 
interval Optional 
60 seconds by default
 
4.  Configure the time to wait before 
receiving a new state-refresh 
message....

 136 
Task  Remarks 
Configuring C-RP timers globally  Optional.
 
Configuring a BSR  Configuring a C-BSR 
Required.
 
Configuring a PIM domain border  Optional. 
Configuring global C-BSR parameters Optional.
 
Configuring C-BSR timers  Optional.
 
Disabling BSM semantic fragmentation  Optional. 
Configuring administrative scoping Enabling administrative scoping 
Optional.
  
Configuring an admin-scope zone 
boundary Optional. 
Configuring C-BSRs for each admin-scope 
zone and the global-scope zone...

 137 
Enabling PIM-SM 
With PIM-SM enabled, a router sends hello messages periodically to discover PIM neighbors and 
processes messages from the PIM neighbors. To deploy a PIM-SM domain, enable PIM-SM on all 
non-border interfaces of the routers.  
 
  IMPORTANT: 
All the interfaces in the same VPN instance on the 
same router must operate in the same PIM mode.  
Enabling PIM-SM globally on the public network 
 
Step Command  Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enable IP multicast...

 138 
 IMPORTANT: 
In a PIM network, if both PIM-SM and BIDIR-PIM 
are enabled, do not configure the same RP to serve 
PIM-SM and BIDIR-PIM simultaneously to avoid PIM routing table errors.  
 
Configuring a static RP 
If only one dynamic RP exists in a network, manually configuring a static RP can avoid communication 
interruption because of single-point failures. It can  also avoid frequent message exchange between C-RPs 
and the BSR.  
 
  IMPORTANT: 
To enable a static RP to work normally, you must...

 139 
 NOTE: 
•  When you configure a C-RP, ensure a relatively large bandwidth between this C-RP and the other 
devices in the PIM-SM domain. 
•   An RP can serve multiple multicast groups or all multicast groups. Only one RP can forward multicast 
traffic for a multicast group at a moment. 
 
Enabling auto-RP 
Auto-RP announcement and discovery messages are addressed to the multicast group addresses 
224.0.1.39 and 224.0.1.40. With auto-RP enabled on a device, the device can receive these two types 
of...

 140 
Configuring a BSR 
Configuration guidelines 
Before you configure a BSR, make sure that you are familiar with BSR election process, BSR legal address 
against BSR spoofing, PIM domain border, global C-BSR parameters, C-BSR timers, and bootstrap 
message fragments (BSMFs). 
•   BSR election process 
A PIM-SM domain can have only one BSR, but must  have at least one C-BSR. Any router can be 
configured as a C-BSR. Elected from C-BSRs, the  BSR is responsible for collecting and advertising 
RP...

 141 
A PIM domain border is a bootstrap message boundary. Each BSR has its sp ecific service scope. 
A number of PIM domain border interfaces parti tion a network into different PIM-SM domains. 
Bootstrap messages cannot cross a doma in border in either direction.  
•   C-BSR parameters 
In each PIM-SM domain, a unique BSR is electe d from C-BSRs. The C-RPs in the PIM-SM domain 
send advertisement messages to the BSR. The BSR  summarizes the advertisement messages to form 
an RP-set and advertises it to...

 142 
Because the RP-set information contained in each segment is different, loss of some IP fragments 
will not result in dropping of the entire message.  
The function of BSM semantic fragmentation is en abled by default. Devices not supporting this 
function might deem a fragment as an entire mess age and learn only part of the RP-set information. 
Therefore, if such devices exist in the PIM- SM domain, you need to disable the semantic 
fragmentation function on the C-BSRs.  
Generally, a BSR performs...

 143 
Step Command Remarks 
4.  Configure the C-BSR priority. 
c-bsr priority priority  Optional. 
By default, the C-BSR priority is 64.
 
Configuring C-BSR timers 
Perform the following configuration on C-BSR routers.  
To  c o n fig u re  C - BS R  t i me rs : 
 
Step Command Remarks 
1.
  Enter system view. 
system-view  N/A 
2.  Enter public network PIM view 
or VPN instance PIM view.  pim
 [ vpn-instance 
vpn-instance-name  ]  N/A 
3.
  Configure the BS period.  
c-bsr interval interval  Optional....

 144 
Step Command Remarks 
2.  Enter public network PIM view 
or VPN instance PIM view.  pim
 [ vpn-instance 
vpn-instance-name  ]  N/A 
3.
  Enable administrative 
scoping.   c-bsr admin-scope 
Disabled by default 
 
Configuring an admin-scope zone boundary 
ZBRs form the boundary of each admin-scope zone . Each admin-scope zone maintains a BSR, which 
serves a specific multicast group range. Multicas t protocol packets (such as assert messages and 
bootstrap messages) that belong  to this range cannot...