Cisco APIC Layer 3 Networking Configuration Guide, Release 6.2(x)

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Cisco APIC Layer 3 Networking Configuration Guide, Release 6.2(x)

A PIM interface was not created for a multicast tunnel interface

Updated: April 17, 2026

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Provides troubleshooting steps when a PIM interface is not created for a multicast tunnel interface.

If a PIM interface (pim:if) is not created for a multicast tunnel interface (tunnel:If), confirm the items in this list.

  1. The corresponding tunnel:If has been created.

    Note

    The tunnel:If should have type "underlay-mcast."

  2. Each mcast-enabled VRF has created an mcast tunnel.

  3. The destination IP field of the tunnel:If is populated with a valid GIPO address.

  4. If the tunnel:If is not populated with a valid GIPO address, check the pim:CtxP on the IFC and the pim:CtxDef on the switches to make sure GIPO is allocated correctly.

  5. The source IP of the tunnel:If has the loopback address of an L3Out for BL and "127.0.0.100" for NBL.