3com S7906E インストール手順
1-16
To do...
Use the command...
Description
Enable IP multicast routing
multicast routing-enable
Required
Disabled by default
Enter interface view
interface interface-type
interface-number
interface-number
—
Enable PIM-DM
pim dm
Required
Disabled by default
z
All the interfaces in the same VPN instance on the same device must work in the same PIM mode.
z
PIM-DM does not work with multicast groups in the SSM group grange.
z
For details about the ip vpn-instance and route-distinguisher commands, see MPLS L3VPN
Commands in the MPLS Volume.
z
For details about the multicast routing-enable command, see Multicast Routing and Forwarding
Commands in the IP Multicast Volume.
Enabling State-Refresh Capability
Pruned interfaces resume multicast forwarding when the pruned state times out. To prevent this, the
router with the multicast source attached periodically sends an (S, G) state-refresh message, which is
forwarded hop by hop along the initial multicast flooding path of the PIM-DM domain, to refresh the
prune timer state of all the routers on the path. A multi-access subnet can have the state-refresh
capability only if the state-refresh capability is enabled on all PIM routers on the subnet.
Follow these steps to enable the state-refresh capability:
To do...
Use the command...
Remarks
Enter system view
system-view
—
Enter interface view
interface interface-type
interface-number
interface-number
—
Enable state-refresh
pim state-refresh-capable
Optional
Enabled by default
Configuring State-Refresh Parameters
The router directly connected with the multicast source periodically sends state-refresh messages. You
can configure the interval for sending such messages.