HP A8800 Configuration Manual page 420

Step
2. Enter IPv6 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 IPv6 address and RP-Set information through bootstrap
messages within the entire zone it serves. 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.
Perform the following configuration on C-BSR routers.
IMPORTANT:
Be sure to configure a BS period smaller than the BS timeout value.
If you configure the BS period or the BS timeout timer, the system uses the configured one instead of the
default one.
To configure C-BSR timers:
Step
1. Enter system view.
2. Enter IPv6 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 IPv6
BIDIR-PIM domain. It encapsulates a BSM in an IP datagram and may split the datagram into fragments
if the message exceeds the maximum transmission unit (MTU). In respect of such IP fragmentation, loss of
a single IP fragment leads to unavailability of the entire message.
Command
pim ipv6
c-bsr hash-length hash-length
c-bsr priority priority
Command
system-view
pim ipv6
c-bsr interval interval
c-bsr holdtime interval
408
Remarks
N/A
Optional.
126 by default.
Optional.
64 by default.
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).