Configuration Prerequisites - HP A8800 Configuration Manual

Task
Configuring IPv6 PIM common features

Configuration prerequisites

Before configuring IPv6 PIM-DM, complete the following task:
Enable IPv6 forwarding and configure any IPv6 unicast routing protocol so that all devices in the
•
domain are interoperable at the network layer.
Determine the interval between state refresh messages.
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• Determine the minimum time to wait before receiving a new refresh message.
Determine the hop limit value of state-refresh messages.
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Determine the graft retry period.
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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 deploying an IPv6 PIM-DM domain, you
are recommended to enable IPv6 PIM-DM on all non-border interfaces of routers.
When you enable IPv6 PIM-DM, follow these guidelines:
• All the interfaces of the same device must operate in the same IPv6 PIM mode.
MLD snooping is not allowed in a VLAN after IPv6 PIM-DM is enabled on the virtual interface of the
•
VLAN, and vice versa.
• IPv6 PIM-DM cannot be used for IPv6 multicast groups in the IPv6 SSM group range.
To enable IPv6 PIM-DM:
Step
Enter system view.
1.
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:
Command
system-view
multicast ipv6 routing-enable
interface interface-type
interface-number
pim ipv6 dm
390
Remarks
Optional.
Remarks
N/A
Disable by default.
N/A
Disabled by default.