It is my understanding that on point-to-point
interfaces they need to be on seperate subnets. If
you have multiple routers coming into one interface,
declare the interface a point-to-multipoint interface.
Do this when you create the subinterface or use the
"ip ospf network XXXXX" interface command.
See this URL for Design suggestions.
http://www.cisco.com/warp/public/104/3.html
William Swedberg CCNP CCDP
--- Peter Gray <[EMAIL PROTECTED]> wrote:
> I have got a problem with FR Config Running OSPF.
> Router A & B are connected
> to C & D over FR PVC but they don't have to talk to
> each ther. It means A
> connected to C & D and B is also connected to C & D.
> I am using FR
> Subinterfaces with pt-to-pt. What is happening that
> sometime I am able to
> ping to router C & router D subinterfaces from
> router A but sometimes i
> don't get any response. I am even unable to ping
> sub-intf of Routers from
> within the routers.
> See sample config of one of the routers that i have:
> interface Serial0
> no ip address
> ip directed-broadcast
> encapsulation frame-relay
> ip ospf network broadcast
> no ip mroute-cache
> !
> interface Serial0.1 point-to-point
> ip address 131.18.19.185 255.255.255.252
> ip directed-broadcast
> ip ospf network broadcast
> frame-relay interface-dlci 310
> !
> interface Serial0.2 point-to-point
> ip address 131.18.19.189 255.255.255.252
> ip directed-broadcast
> ip ospf network broadcast
> frame-relay interface-dlci 210
>
> This is config of router B connected to C & D and
> subintf of C &D are on
> same subnet as subintf 0.1 and 0.2 on this router.
> Is pt-to-pt with sub-intf OK for this scenario?
>
> Any suggestions... What is the possible cause of
> problem?? Why I am even
> unable to ping local subintface from within the
> router??
>
> Thanks..
>
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