HP A8800 Configuration Manual page 148

Step
1. Enter system view.
2. Enter public network PIM view
or VPN instance PIM view.
3. Configure the hash mask
length.
4. Configure the C-BSR priority.
Configuring C-BSR timers
The BSR election winner multicasts its own IP address and RP-Set information throughout the region that
it serves through bootstrap messages. The BSR floods bootstrap messages throughout the network at the
interval of BS (BSR state) period. Any C-BSR that receives a bootstrap message retains the RP-set for the
length of BS timeout, during which no BSR election takes place. If the BSR state times out and no
bootstrap message is received from the BSR, a new BSR election process is triggered among the C-BSRs.
If you configure the BS period or the BS timeout timer, the system uses the configured one instead of the
default one.
IMPORTANT:
Be sure to configure a BS period value smaller than the BS timeout value.
Perform the following configuration on C-BSR routers.
To configure C-BSR timers:
Step
1. Enter system view.
2. Enter public network PIM view
or VPN instance PIM view.
3. Configure the BS period.
4. Configure the BS timeout.
Disabling BSM semantic fragmentation
Generally, a BSR periodically distributes the RP-set information in bootstrap messages within the PIM-SM
domain. It encapsulates a BSM in an IP datagram and may split the datagram into fragments if the
Command
system-view
pim [ vpn-instance
vpn-instance-name ]
c-bsr hash-length hash-length
c-bsr priority priority
Command
system-view
pim [ vpn-instance
vpn-instance-name ]
c-bsr interval interval
c-bsr holdtime interval
136
Remarks
N/A
N/A
Optional.
30 by default.
Optional.
By default, the C-BSR priority is 64.
Remarks
N/A
N/A
Optional.
By default, the BS period is
determined by this formula: BS
period = (BS timeout – 10) / 2.
The default BS timeout is 130
seconds, so the default BS period =
(130 – 10) / 2 = 60 (seconds).
Optional.
By default, the BS timeout value is
determined by this formula: BS
timeout = BS period × 2 + 10. The
default BS period is 60 seconds, so
the default BS timeout = 60 × 2 +
10 = 130 (seconds).