3Com Switch 7700 Configuration Manual page 230

222 C 6: M
HAPTER ULTICAST
P
ROTOCOL
Configuring the Interface Hello Message Interval
Generally, PIM-SM advertises Hello messages periodically on the interface enabled
with it to detect PIM neighbors and discover which router is the Designated Router
(DR).
Perform the following configuration in VLAN interface view.
Table 38 Configuring the Interface Hello Message Interval
Operation
Configure the interface hello message interval pim timer hello seconds
Restore the interval to the default value
By default, the hello message interval is 30 seconds. Users can configure the value
according to different network environments.
This configuration can be performed only after the PIM (PIM-DM or PIM-SM) is
enabled in VLAN interface view.
Configuring the Filtering of Multicast Source/Group
See "Configuring PIM-DM" on page 211.
Configuring the Filtering of PIM Neighbor
See "Configuring PIM-DM" on page 211.
Configuring the Maximum Number of PIM Neighbor on an Interface
See "Configuring PIM-DM" on page 211.
Configuring RP to Filter the Register Messages Sent by DR
In the PIM-SM network, the register message filtering mechanism can control
which sources to send messages to, which groups on the RP, i.e., RP can filter the
register messages sent by DR to accept specified messages only.
Perform the following configuration in PIM view.
Table 39 Configuring RP to Filter the Register Messages Sent by DR
Operation
Configure RP to filter the register messages
sent by DR
Cancel the configured filter of messages
If an entry of a source group is denied by the ACL, or the ACL does not define
operation to it, or there is no ACL defined, the RP will send RegisterStop messages
to the DR to prevent the register process of the multicast data stream.
Only the register messages matching the ACL permit clause can be accepted by
the RP. Specifying an undefined ACL will make the RP deny all register messages.
Limiting the Range of Legal BSR
In the PIM SM network using BSR (bootstrap router) mechanism, every router can
set itself as C-BSR (candidate BSR) and take the authority to advertise RP
Command
undo pim timer hello
Command
register-policy acl-number
undo register-policy