Re: ospf default route

From my lab test:
- OSPF check only "sh ip ro 54.1.1.0 255.255.255.0"
  If route is in RIB advertise default if not, stop advertise
- I see that you have keyword "always"
  With this keyword or without it works the same as above
- Directly connected route could be down (link problem or
intentionally shutdown)
  then will disappear from RIB

On 4/15/13, Imran Ali <immrccie_at_gmail.com> wrote:
> Hi ,
>
> based on follwoing config , intent is to track the route and originate a
> default route .
>
>
> router ospf 1
> default-information originate always route-map TRACK_LINK_TO_BB1
> !
> ip prefix-list LINK_TO_BB1 seq 5 permit 54.1.1.0/24
> !
> route-map TRACK_LINK_TO_BB1 permit 10
> match ip address prefix-list LINK_TO_BB1
>
>
>
> quesiton : 54.1.1.0/24 is FR subnet . how does ospf track this .
>
> it is a connected route that never disappears from routing table
> regardless of layer 2 status .
>
> how ospf process determines this route is active ? does it checks the
> layer two status ? or does it check if route is availble in routing
> table ? in later case the route is always available as connected route
> .............
>
>
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Krzysiek
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