OSPF Adjacency Fails on Advanced Routing Engine (ARE) When Using Point-to-Multipoint (P2MP) Link Type

OSPF Adjacency Fails on Advanced Routing Engine (ARE) When Using Point-to-Multipoint (P2MP) Link Type

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Created On 07/31/26 16:21 PM - Last Modified 08/18/26 19:35 PM


Symptom


OSPF fails to establish adjacency on Palo Alto Networks firewalls using the Advanced Routing Engine (ARE) when configured with the Point-to-Multipoint (P2MP) link type.

  • Broadcast link type: Adjacency forms successfully.

  • P2MP link type: Adjacency fails to reach a bidirectional state, even with static neighbors configured manually.

Environment


  • PAN-OS 11.2
  • OSPF Link Type: Point-to-Multipoint (P2MP)
  • Routing Protocol Engine: Advanced Routing Engine 

Cause


  • The Advanced Routing Engine (ARE) utilizes an integrated routing architecture. At present, PAN-OS does not support OSPF P2MP Non-Broadcast link types.
  • This is a recognized limitation in the Advanced Routing Engine schema. 

Resolution


The recommended workaround is to utilize the broadcast link type.
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