Controller Based WLANs

What should I know about OSPF in Aruba products?

by on ‎07-02-2014 05:08 PM

Product and Software: This article applies to all Aruba controllers and ArubaOS versions 5.x and later.


  • OSPF is disabled by default.

  • Aruba controllers support only one OSPF instance.

  • Maximum OSPF routes is 1K.

  • Convergence takes between 5 and 15 seconds.

  • Only stub and totally stub areas are supported.

  • Only one area can be configured.

  • Aruba controller cannot act as an area border router (ABR) or autonomous system border router (ASBR).

  • OSPF packets use generic routing encapsulation (GRE) over Internet Protocol Security (IPsec) tunnels. A Layer 3 GRE tunnel is configured between two routers with GRE destination addresses as the inner address of the IPsec tunnel. OSPF is enabled on the Layer 3 GRE tunnel interface and all of the OSPF control packets undergo GRE encapsulation before entering the IPsec tunnels.

  • The default MTU value for a Layer 3 GRE tunnel in an Aruba controller is 1100. When running OSPF over a GRE tunnel between an Aruba controller and another vendor's router, the MTU values must be the same on both sides of the GRE tunnel.
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