Configuring PIM
Configuring PIM
OmniSwitch AOS Release 7 Advanced Routing Configuration Guide
March 2011
page 6-25
The group address is listed as 224.0.0.0. The class D group mask (255.255.255.255) has been translated
into the Classless Inter-Domain Routing (CIDR) prefix length of /4. The C-RP is listed as 172.21.63.11.
The status is enabled.
Specifying the Maximum Number of RPs
You can specify the maximum number of RPs allowed in a PIM-SM domain.
Important.
PIM must be globally disabled on the switch before changing the maximum number of
RPs. To disable PIM, use the
ip pim sparse admin-state
command. See
“Disabling PIM Mode on the
Switch” on page 6-21
for more information.
To specify a maximum number of RPs, use the
ip pim max-rps
command. For example:
-> ip pim max-rps 12
Note.
This command is used with both IPv4 and IPv6 PIM-SM. PIM-SM must be disabled before chang-
ing
max-rps
value.
Verifying Maximum-RP Configuration
Check the maximum number of RPs using the
show ip pim sparse
command. For example:
-> show ip pim sparse
Status = enabled,
Keepalive Period = 210,
Max RPs = 32,
Probe Time = 5,
Register Checksum = header,
Register Suppress Timeout = 60,
RP Threshold = 1,
SPT Status = enabled,
For more information about these displays, see the “PIM Commands” chapter in the
OmniSwitch CLI
Reference Guide
.
Candidate Bootstrap Routers (C-BSRs)
A Candidate Bootstrap Router (C-BSR) is a PIM-SM-enabled router that is eligible for Bootstrap Router
(BSR) status. To become a BSR, a C-BSR must be
elected
. A C-BSR sends Bootstrap messages to all
neighboring routers. The messages include its IP address—which is used as an identifier—and its priority
level. The C-BSR with the highest priority level is elected as the BSR by its neighboring routers. If there
are multiple C-BSRs with the same highest priority, the C-BSR with the highest IP address will become
the BSR.
For information on configuring a C-BSR, refer to
“Configuring a C-BSR”
below.