Manipulating OSPF distance

Hi,

 

When we manipulate OSPF distance for a specific route with an ACL ,

do we match the route source as the next hop (just like EIGRP) or match the route originator in the OSPF database?

 

 

Thx

Comments

  • You have to match OSPF router-id

    Dmitriy

    Hi,

     

    When we manipulate OSPF distance for a specific route with an ACL ,

    do we match the route source as the next hop (just like EIGRP) or match the route originator in the OSPF database?

     

     

    Thx


  • ssg14ssg14 ✭✭

    Hi,

     

    That's what I mean , whose router ID ?

     

    Next hop router ID which we got the route from or the route originator in the SPF database?

     

     

    Thx

  • Route originator

    Hi,

     

    That's what I mean , whose router ID ?

     

    Next hop router ID which we got the route from or the route originator in the SPF database?

     

     

    Thx


  • If you are on the subject of ospf AD, have a look at how this works with default routes... it's a whole lot of fun :)

    I have been trying to get this all day and just when I think I know what it will do next it throws me off balance again...

    It is not just AD, but generally manipulating multiple default routes in ospf.

    There's a great article here http://www.nil.si/ipcorner/OSPFDefaultMysteries/ but even after reading it there are still surprises.  I don't know whether I can put it down to IOS versions and platforms - I know I don't want to :)

    Have you tried labbing this stuff up?

  • <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">





    All of the protocols use"advertising router" as the moniker.  The catch
    is differentiating between the protocols and their meaning!



    In RIP - it's the guy right next to you (neighbor IP address is fine as
    there is no peering here)

    In EIGRP - it's successor ID.  Should be next-hop IP address as that's
    the Peer Neighbor listed

    In OSPF - it's the "advertising router" from the OSPF database.  That
    will be a RID value which may or may not be the IP, and may or may not
    be the device right next to you!



    HTH,






     



    Scott Morris, CCIEx4
    (R&S/ISP-Dial/Security/Service Provider) #4713,

    JNCIE-M #153, JNCIS-ER, CISSP, et al.

    CCSI #21903, JNCI-M, JNCI-ER

    [email protected]



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    ssg14 wrote:

    Hi,

     

    When we manipulate OSPF distance for a specific route with an ACL
    ,

    do we match the route source as the next hop (just like EIGRP) or
    match the route originator in the OSPF database?

     

     

    Thx







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