Next Generation Firewall (NGFW)

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different ospf timer values

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  • 1.  different ospf timer values

    Posted Aug 27, 2020 08:58 AM
    Hello,

    I have configured my Fortigates on OSPF protocol with hello timer = 1, dead timer = 4 by using GUI.
    To be sure, I checked them by CLI. Everything goes fine.

    But when i run "get router info ospf interface" command, it showed hello timer = 10, dead timer = 40.
    I didn't know where they come from and why they are changed.

    My FortiOS is 6.4.1

    Thank you.


  • 2.  RE: different ospf timer values

    Posted 25 days ago
    Hello,

    Is it a software bug in this version?
    I need your feedback if you have seen.


  • 3.  RE: different ospf timer values
    Best Answer

    Posted 25 days ago

    Starting info

    CK-MIA-FW-01 # get router info ospf interface
    lan is up, line protocol is up
    Internet Address 192.168.25.252/24, Area 9.9.9.9, MTU 1500
    Process ID 0, VRF 0, Router ID 9.9.9.9, Network Type BROADCAST, Cost: 1
    Transmit Delay is 1 sec, State DR, Priority 1
    Designated Router (ID) 9.9.9.9, Interface Address 192.168.25.252
    No backup designated router on this network
    Timer intervals configured, Hello 10.000, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:07
    Neighbor Count is 0, Adjacent neighbor count is 0
    Crypt Sequence Number is 1
    Hello received 0 sent 5417, DD received 0 sent 0
    LS-Req received 0 sent 0, LS-Upd received 0 sent 0
    LS-Ack received 0 sent 0, Discarded 0

    Set values
    config router ospf
     config ospf-interface
       edit "lan"
          set interface "lan"
          set dead-interval 4
          set hello-interval 1
    next
    end
    Checked and values look in place
    CK-MIA-FW-01 # get router info ospf interface
    lan is up, line protocol is up
    Internet Address 192.168.25.252/24, Area 9.9.9.9, MTU 1500
    Process ID 0, VRF 0, Router ID 9.9.9.9, Network Type BROADCAST, Cost: 1
    Transmit Delay is 1 sec, State DR, Priority 1
    Designated Router (ID) 9.9.9.9, Interface Address 192.168.25.252
    No backup designated router on this network
    Timer intervals configured, Hello 1.000, Dead 4, Wait 4, Retransmit 5
    Hello due in 00:00:00
    Neighbor Count is 0, Adjacent neighbor count is 0
    Crypt Sequence Number is 1
    Hello received 0 sent 5474, DD received 0 sent 0
    LS-Req received 0 sent 0, LS-Upd received 0 sent 0
    LS-Ack received 0 sent 0, Discarded 0

    Looks fine, though I would only set them like this in lab testing. 
    This is on 6.4.3