Routing

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  • 1.  JUNOS ospf

    Posted 02-17-2012 20:50

    hello , 

     

    I'm kinda newbie to ospf and i have some basic question regarding DR on Junos-ospf

     

    why do i need to configure the loopback interface under the ospf area ?  as i can see in my test lab , i have both routers on the same area with both loopack interfaces in the DR state ?  i understand that there should be one DR per segement , but i don't really understand how a router could be a DR and BDR in the same time for the same area with redundant paths.

     

    Thanks in advance.



  • 2.  RE: JUNOS ospf
    Best Answer

    Posted 02-18-2012 03:34

    Hello,

    In JUNOS, lo0.<unit> defaults to LAN interface type for OSPF.

    Configure p2p OSPF interface type and you won't see DR on lo0.<unit>:

     

    set protocols ospf area <area#> interface lo0.<unit> interface-type p2p

     

    Also it's a good idea to configure lo0.<unit> as "passive" under OSPF.

    HTH

    Rgds

    Alex



  • 3.  RE: JUNOS ospf

    Posted 02-18-2012 10:21

    cool thanks Alex , you're always a great help 🙂