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  • 1.  8320 passive interface default

    Posted Mar 25, 2019 04:35 PM
    Hi,

    On my 8320 I can see under the router OSPF commands an option to enter passive interface default.

    I couldn’t see an option to turn off this command one interface at a time (no passive interface 1/1/1)

    How do you allow for certain ports ... or is the switch smart enough to see which ports you have configured for OSPF under this command?

    Thanks


  • 2.  RE: 8320 passive interface default
    Best Answer

    Posted Mar 26, 2019 05:16 PM

    Greetings!

     

    You can configure individual interfaces as passive OSPF ports from the interface context:

     

    switch(config)# interface 1/1/1
    switch(config-if)# ip ospf passive


  • 3.  RE: 8320 passive interface default

    Posted Mar 26, 2019 05:45 PM
    Thanks, that’s great


  • 4.  RE: 8320 passive interface default

    Posted Mar 27, 2019 10:03 AM

    If I may, FYI, a best practice applied I saw on many large ITs, is to passive all interface and activate only the one that should be active.



  • 5.  RE: 8320 passive interface default

    Posted Mar 27, 2019 10:22 AM
    Would that look like

    Router OSPF 1
    Passive interface default

    Interface 1/1/1
    IP OSPF 1 area 0 - this bit here is what I’m unsure about?

    Does this command override the passive interface default?

    Thanks


  • 6.  RE: 8320 passive interface default
    Best Answer

    Posted Mar 27, 2019 10:41 AM

    Simply no ip ospf passive on the interface.

    Here is an example of SVI with ospf:

     

    interface vlan251
    vrf attach prod
    ip address 10.1.251.2/29
    ip ospf 10 area 0.0.0.0
    no ip ospf passive
    ip ospf cost 100



  • 7.  RE: 8320 passive interface default

    Posted Mar 27, 2019 10:51 AM
    Excellent - thanks for that