H3C Technologies H3C S10500 Series Switches - Manual (Page 159)

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To do... Use the command... Description
Enter system view system-view —
Create a VPN instance and enter
VPN instance view
ip vpn-instance vpn-instance-name —
Configure an RD for the VPN
instance route-distinguisher
route-distinguisher Required
Not configured by default.
Enable IP multicast routing multicast routing-enable
Required
Disabled by default.
Enter interface view
interface interface-type
interface-number
—
Bind the interface with a VPN
instance ip binding vpn-instance
vpn-instance-name
Required
By default, an interface belongs to
the public network, and is not
bound with any VPN instance.
Enable PIM-DM pim dm
Required
Disabled by default.
CAUTION:
•
All the interfaces in the same VPN instance on the same device must work in the same PIM mode.
• PIM-DM does not work with multicast groups in the SSM group range.
NOTE:
•
For more information about the ip vpn-instance, route-distinguisher, and ip binding vpn-instance
commands, see
MPLS Command Reference.
• For more information about the multicast routing-enable command, see IP Multicast Command
Reference.
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
—
Enable the state-refresh capability pim state-refresh-capable
Optional
Enabled by default