Configuration Prerequisites; Enabling Ipv6 Pim-Dm; Enabling State-Refresh Capability - HP 6125G Configuration Manual

Configuration prerequisites

Before you configure IPv6 PIM-DM, complete the following tasks:
Enable IPv6 forwarding and configure an IPv6 unicast routing protocol so that all devices in the
•
domain are interoperable at the network layer.
• Determine the interval between state refresh messages.
Determine the minimum time to wait before receiving a new refresh message.
•
Determine the hop limit value of state-refresh messages.
•
• Determine the graft retry period.

Enabling IPv6 PIM-DM

With IPv6 PIM-DM enabled, a router sends hello messages periodically to discover IPv6 PIM neighbors
and processes messages from the IPv6 PIM neighbors. When you deploy an IPv6 PIM-DM domain,
enable IPv6 PIM-DM on all non-border interfaces of routers.
IMPORTANT:
All the interfaces of the same device must operate in the same IPv6 PIM mode.
•
• IPv6 PIM-DM cannot be used for IPv6 multicast groups in the IPv6 SSM group range.
To enable IPv6 PIM-DM:
Step
1. Enter system view.
2. Enable IPv6 multicast routing.
3. Enter interface view.
4. Enable IPv6 PIM-DM.

Enabling state-refresh capability

Pruned interfaces resume multicast forwarding when the pruned state times out. To prevent this, the router
directly connected with the IPv6 multicast source periodically sends an (S, G) state-refresh message,
which is forwarded hop by hop along the initial flooding path of the IPv6 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 IPv6 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.
Command
system-view
multicast ipv6 routing-enable
interface interface-type
interface-number
pim ipv6 dm
Command
system-view
interface interface-type
interface-number
pim ipv6 state-refresh-capable
300
Remarks
N/A
Disabled by default.
N/A
Disabled by default.
Remarks
N/A
N/A
Optional.
Enabled by default.