3Com Switch 7750 Configuration Guide

Common PIM Configuration 471
Configuring PIM
Neighbors
In order to prevent plenty of PIM neighbors from using out the memory of the
router, which may result in router failure, you can limit the number of PIM
neighbors on the router interface. However, the total number of PIM neighbors of
a router is defined by the system, and you cannot modify it through commands.
You can configure basic ACL 2000 to 2999 (refer to “ACL Configuration” on page
637). Only the filtered Layer 3 switches (routers) cam serve as the PIM neighbors of
the current interface.
c
CAUTION: If the number of existing PIM neighbors exceeds the user-defined limit,
the existing PIM neighbors will not be deleted.
Clearing the Related PIM
Entries
You can execute the reset command in user view to clear the related statistics
about multicast PIM.
Table 375 Configure PIM neighbors
Operation Command Description
Enter system view system-view -
Enable the multicast routing
protocol
multicast routing-enable Required
Enter VLAN interface view interface Vlan-interface
interface-number
-
Enable PIM-DM/PIM-SM on
the current interface
pim dm / pim sm Required
Configure the PIM protocol
type on the interface
Configure limit on the
number of PIM neighbors on
the interface
pim neighbor-limit limit Optional
By default, the upper limit on
the number of PIM neighbors
on a interface is 128
Configure the filtering policy
for PIM neighbors
pim neighbor-policy
acl-number
Optional
■ You can configure to filter
the IP addresses of some
multicast groups in ACL.
■ By default, the filtering
policy for neighbors
cannot be enabled on an
interface.
Table 376 Clear the related PIM entries
Operation Command Description
Clear the PIM route
entries
reset pim routing-table { all
|{group-address [ mask group-mask |
mask-length group-mask-length ] |
source-address [ mask source-mask |
mask-length source-mask-length ]
|{incoming-interface { interface-type
interface-number | null }}} *}
Perform the configuration
in user view.
Clear PIM neighbors reset pim neighbor { all
|{neighbor-address | interface
interface-type interface-number } * }
Perform the configuration
in user view.