HP VPN Firewall Appliances Network Management Configuration Guide

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2. Use the display pim ipv6 interface command to verify the IPv6 PIM information on each interface,
especially on the RPF interface. If IPv6 PIM is not enabled on the interface, use the pim ipv6 dm or
pim ipv6 sm command to enable IPv6 PIM.
3. Use the display pim ipv6 neighbor command to verify that the RPF neighbor is an IPv6 PIM
neighbor.
4. Verify that IPv6 PIM and MLD are enabled on the interfaces directly connecting to the IPv6
multicast source and to the receiver.
5. Use the display pim ipv6 interface verbose command to verify that the same PIM mode is enabled
on the RPF interface and the corresponding interface of the RPF neighbor router.
6. Use the display current-configuration command to verify the IPv6 PIM mode information on each
interface. Make sure the same IPv6 PIM mode (IPv6 PIM-SM or IPv6 PIM-DM) is enabled on all
routers.
IPv6 multicast data is abnormally terminated on an
intermediate router
Symptom
An intermediate router can receive IPv6 multicast data successfully, but the data cannot reach the
last-hop router. An interface on the intermediate router receives data but no corresponding (S, G) entry
is created in the IPv6 PIM routing table.
Analysis
• If an IPv6 multicast forwarding boundary has been configured through the multicast ipv6 boundary
command, any IPv6 multicast packet will be kept from crossing the boundary. Because of this, no
routing entry can be created in the IPv6 PIM routing table.
• In addition, the source-policy command filters received IPv6 multicast packets. If the IPv6 multicast
data fails to pass the IPV6 ACL rule defined in this command, IPv6 PIM cannot create the route entry,
either.
Solution
1. Use the display current-configuration command to verify the IPv6 multicast forwarding boundary
settings. Use the multicast ipv6 boundary command to change the IPv6 multicast forwarding
boundary settings.
2. Use the display current-configuration command to verify the IPv6 multicast filter configuration.
Change the IPv6 ACL rule defined in the source-policy command so that the source/group address
of the IPv6 multicast data can pass ACL filtering.
RPs cannot join the SPT in IPv6 PIM-SM
Symptom
An RPT cannot be established correctly, or the RPs cannot join the SPT to the IPv6 multicast source.
Analysis
• As the core of an IPv6 PIM-SM domain, the RPs serves specific IPv6 multicast groups. Multiple RPs
can coexist in a network. Make sure the RP information on all routers is exactly the same, and a
specific group is mapped to the same RP. Otherwise, IPv6 multicast will fail.