Enabling Ipv6 Pim-Dm; Enabling State-Refresh Capability; Configuring State-Refresh Parameters - HP A6600 Configuration Manual

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.
All the interfaces of the same device must work in the same IPv6 PIM mode. IPv6 PIM-DM cannot be used
for IPv6 multicast groups in the IPv6 SSM group range.
To do...
1. Enter system view.
2. Enable IPv6 multicast routing.
3. Enter interface view.
4. Enable IPv6 PIM-DM.
For more information about the multicast ipv6 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
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 do...
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.
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 receiving the next state-refresh message. If the router receives a new
state-refresh message within the waiting time, it discards it. If this timer times out, the router will accept a
new state-refresh message, refresh its own IPv6 PIM-DM state, and reset the waiting timer.
The hop limit value of a state-refresh message decrements by 1 whenever it passes a router before it is
forwarded to the downstream node until the hop limit value comes down to 0. In a small network, a
Use the command...
system-view
multicast ipv6 routing-enable
interface interface-type
interface-number
pim ipv6 dm
Use the command...
system-view
interface interface-type
interface-number
pim ipv6 state-refresh-capable
313
Remarks
—
Required
Disable by default
—
Required
Disabled by default
Remarks
—
—
Optional.
Enabled by default.