Enabling Pim-Dm; Enabling State-Refresh Capability; Configuring State-Refresh Parameters - HP 6125G Configuration Manual

Determine the interval between state-refresh messages.
•
• Determine the minimum time to wait before receiving a new refresh message.
Determine the TTL value of state-refresh messages.
•
Determine the graft retry period.
•

Enabling PIM-DM

With PIM-DM enabled, a router sends hello messages periodically to discover PIM neighbors and
processes messages from the PIM neighbors. When you deploy a PIM-DM domain, enable PIM-DM on
all non-border interfaces of the routers.
IMPORTANT:
All the interfaces on the same device must operate in the same PIM mode.
•
PIM-DM does not work with multicast groups in the SSM group range.
•
Step
1. Enter system view.
2. Enable IP multicast routing.
3. Enter interface view.
4. Enable PIM-DM.
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.
To enable the state-refresh capability:
Step
1. Enter system view.
2. Enter interface view.
3. Enable the state-refresh
capability.

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.
Command
system-view
multicast routing-enable
interface interface-type
interface-number
pim dm
Command
system-view
interface interface-type
interface-number
pim state-refresh-capable
115
Remarks
N/A
Disabled by default.
N/A
Disabled by default.
Remarks
N/A
N/A
Optional
Enabled by default