Configuring PIM
Configuring PIM
OmniSwitch AOS Release 7 Advanced Routing Configuration Guide
March 2011
page 6-23
This command entry maps the multicast group 224.0.0.0/4 to PIM-SSM and specifies the priority value to
be used for the entry as 50. This priority specifies the preference value to be used for this static configura-
tion and provides fine control over which configuration is overridden by this static configuration
.
Values
may range from 0 to 128. If the priority option has been defined, a value of 65535 can be used to unset the
priority.
You can also use the
override
parameter to specify whether or not this static configuration overrides the
dynamically learned group mapping information for the specified group. As specifying the priority value
obsoletes the
override
option, you can use only the
priority
parameter or the
override
parameter. By
default, the
priority
option is not set and the
override
option is set to false.
Use the
no
form of this command to remove a static configuration of a SSM mode group mapping.
-> no ip pim ssm group 224.0.0.0/4
The default SSM address range (232.0.0.0 through 232.255.255.255) reserved by the Internet Assigned
Numbers Authority is not enabled automatically for PIM-SSM and must be configured manually to
support SSM. You can also map additional multicast address ranges for the SSM group. However, the
multicast groups in the reserved address range can be mapped only to the SSM mode.
Verifying Group Mapping
To view PIM-DM group mappings, use the
show ip pim dense group
command. For example:
-> show ip pim dense group
Group Address/Pref Length Mode Override Precedence Status
---------------------------+-----+--------+----------+--------
224.0.0.0/4
dm false none enabled
To view PIM-SSM mode group mappings, use the
show ip pim ssm group
command. For example:
-> show ip pim ssm group
Group Address/Pref Length Mode Override Precedence Status
---------------------------+-----+--------+----------+--------
224.0.0.0/4
ssm false none enabled
Automatic Loading and Enabling of PIM after a System Reboot
If
any
PIM command is saved to the
boot.cfg
file in the post-boot running directory, the switch will auto-
matically load PIM into memory. The post-boot running directory is the directory the switch will use as its
running directory after the next switch reboot (i.e., Working or Certified).
If the command syntax
ip pim sparse admin-state enable
or
ip pim dense admin-state enable
is saved
to the
boot.cfg
file in the post-boot running directory, the switch will automatically load PIM into memory
and
globally enable PIM the next time the switch reboots. For detailed information on the Working and
Certified directories and how they are used, see the “CMM Directory Management” chapter in the
OmniSwitch AOS Release 7 Switch Management Guide
.