R3303-HP HSR6800 Routers IP Multicast Configuration Guide

113
Ste
p
Command Descri
p
tion
2. Create a VPN instance and
enter VPN instance view.
ip vpn-instance vpn-instance-name
N/A
For more information about this
command, see MPLS Command
Reference.
3. Configure an RD for the VPN
instance.
route-distinguisher
route-distinguisher
Not configured by default.
For more information about this
command, see MPLS Command
Reference.
4. Enable IP multicast routing.
multicast routing-enable Disabled by default.
5. Enter interface view.
interface interface-type
interface-number
N/A
6. Bind the interface with a VPN
instance.
ip binding vpn-instance
vpn-instance-name
By default, an interface belongs to
the public network, and is not
bound with any VPN instance.
For more information about this
command, see MPLS Command
Reference.
7. Enable PIM-DM.
pim dm Disabled by default.
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 pruned state
timer of all the routers on the path. A shared-media subnet can have the state-refresh capability only if the
state-refresh capability is enabled on all PIM routers on the subnet.
To enable the state-refresh capability:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable the state-refresh
capability.
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.
A router might receive multiple state-refresh messages within a short time. Some messages might be
duplicated messages. To keep a router from receiving such duplicated messages, you can configure the
time that the router must wait before it receives next state-refresh message. If the router receives a
state-refresh message, it starts a waiting timer. If the router receives a new state-refresh message before