3Com Switch 7750 Configuration Guide Guide

428 CHAPTER 44: PIM CONFIGURATION
Enabling PIM-DM
(PIM-SM) on the
Interface
Configuring the Interval
of Sending Hello Packets
PIM-DM must be enabled on each interface. After the configuration, PIM-DM will
send PIM Hello packets periodically and process protocol packets that the PIM
neighbors send.
c
CAUTION:
■ When PIM-DM is enabled on an interface, PIM-SM cannot be enabled on the
interface any more, and vice versa.
■ When PIM-DM is enabled on an interface of the switch, only PIM-DM can be
enabled on the other interfaces of the switch, and vice versa.
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
Tabl e 337 Configuration tasks
Operation Description Related section
Enable PIM-DM (PIM-SM) on
the interface
Required
“Enabling PIM-DM (PIM-SM)
on the Interface”
Configure the interval of
sending Hello packets
Optional
“Configuring the Interval of
Sending Hello Packets”
Configure PIM neighbors Optional “Configuring PIM Neighbors”
Clear the related PIM entries Optional
“Clearing the Related PIM
Entries”
Tabl e 338 Enable PIM-DM (PIM-SM) on the interface
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
Optional
Configure the PIM protocol
type on the interface
Tabl e 339 Configure the interval of sending Hello packets
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 the interval of
sending Hello packets on the
interface
pim timer hello seconds
Required
The interval of sending Hello
packets is 30 seconds