Multicast Virtualization; General Multicast Virtualization Troubleshooting - Avaya 8800 Troubleshooting Manual

Multicast virtualization

In most cases, a virtualized multicast instance functions in an identical manner to a
nonvirtualized multicast instance. There are some exceptions to avoid. For example, a
virtualized multicast instance cannot function properly in a PIM-DM or DVMRP only network,
because the protocols are not supported for virtualization.
Possible reasons for VRF Multicast failures are:
• The system has reached the maximum number of supported multicast streams. The
system multicast stream total is shared between all VRFs and might all be consumed by
another multicast instance.
• The VRF instance does not have a supported unicast protocol created and enabled. A
source is not reachable in the appropriate VRF instance.
• Multicast configuration errors.
• The attached subnet running a multicast protocol is not supported in a virtualized instance.
Supported Protocols include IGMP, PIM-SM, and PIM-SSM.
For specific multicast virtualization troubleshooting procedures, see:
•

General multicast virtualization troubleshooting

• Cannot enable PIM on a VRF
• Cannot create a PIM instance on a VRF
• Cannot enable PIM on a VLAN or brouter interface
• Warning message appears when enabling PIM on an interface
• Cannot enable IGMPv3 on a VLAN
• Maximum number of PIM neighbors is reached
General multicast virtualization troubleshooting
If a virtualized multicast failure has occurred, run the following diagnostic commands to
determine the status of the multicast instance and identify a potential trigger for the issue.
Procedure steps
1. To determine the status of the PIM instance, enter the following command using
Troubleshooting
the CLI or ACLI:
show ip vrf info [vrf <value>]
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Multicast virtualization
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