3com S7906E Installationsanweisungen
1-30
To do...
Use the command...
Remarks
Disable the SPT switchover
spt-switch-threshold infinity
[ group-policy acl-number
[ order order-value] ]
[ group-policy acl-number
[ order order-value] ]
Optional
By default, the device switches
to the SPT immediately after it
receives the first multicast
packet.
to the SPT immediately after it
receives the first multicast
packet.
For an S7900E Series Ethernet switch, once a multicast forwarding entry is created, subsequent
multicast data will not be encapsulated in register messages before being forwarded even if a register
outgoing interface is available. Therefore, to avoid forwarding failure, do not use spt-switch-threshold
infinity command on a switch that may become an RP (namely, a static RP or a C-RP).
Configuring PIM-SSM
The PIM-SSM model needs the support of IGMPv3. Therefore, be sure to enable IGMPv3 on PIM
routers with multicast receivers.
PIM-SSM Configuration Task List
Complete these tasks to configure PIM-SSM:
Task
Remarks
Required
Optional
Optional
Configuration Prerequisites
Before configuring PIM-SSM, complete the following task:
z
Configure any unicast routing protocol so that all devices in the domain are interoperable at the
network layer.
Before configuring PIM-SSM, prepare the following data:
z
The SSM group range