Routing

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OSPF Routing with Fortigate Firewall

  • 1.  OSPF Routing with Fortigate Firewall

    Posted 08-20-2021 16:58
    I just started a basic lab with OSPF routing between a vQFX and a Fortigate Router.
    The topology is quite simple :
    • I have 2 vrf on my qFX
    • The first vrf C2 is acting as a backbone router and is redistributing external subnet 10.103.2.0/24 in ospf
    • The second vrf C1 is located in an other ospf area (regular one)
    • A fortigate router is acting as a ABR in between

    OSPF adjancies are up. And native OSPF subnets are exchanged between the 2 areas.
    Yet there's an issue with the external 10.103.2.0/24 subnet. He's learned and propagated by the Fortigate but it is not loaded in vrf C1 RIB.
    I am scratching my head. Is there an interoperability issue or did I miss something really trivial ?

    If I looked in vrf C1 ospf database, everything seems in order : 10.103.2.0 is advertised by ASBR 2.65.251.66 which in turn is known by my ABR 100.65.251.80
    Connectivity is up all the way through



  • 2.  RE: OSPF Routing with Fortigate Firewall

    Posted 08-24-2021 11:34
    Just a quick follow up if it may help others.
    Since is a normal junos behaviour (loop avoidance) when using vrf.
    There is a kb wich explain this:


  • 3.  RE: OSPF Routing with Fortigate Firewall

    Posted 08-27-2021 05:35
    Oh yeah, this is what is called capability-vrf in other vendors, and it is a go to when having the OSPF process inside VRF in order to accept routes.

    Elvin