User guide

Configuring PIM Configuring PIM
OmniSwitch AOS Release 7 Advanced Routing Configuration Guide March 2015 page 7-23
This command entry maps the multicast group 225.0.0.0/24 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 configu-
ration 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 225.0.0.0/24
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
---------------------------+-----+--------+----------+--------
225.0.0.0/24 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
---------------------------+-----+--------+----------+--------
225.0.0.0/24 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.