From: Jaycee Cockburn - BCX SS (Jaycee.Cockburn@bcx.co.za)
Date: Tue Aug 09 2005 - 09:37:12 GMT-3
Hi S,
Me again,
Try this: (It worked for me...)
When you use virtual-ifs it will automagically convert to OSPF PtP links
------------------------------------------------------------------------
-----------------
On Router A
interface Serial0/0
no ip address
encapsulation frame-relay
no arp frame-relay
no frame-relay inverse-arp
!
interface Serial0/0.55 point-to-point
frame-relay interface-dlci 405 ppp Virtual-Template1
interface Virtual-Template1
ip address 10.1.1.2 255.255.255.0
router ospf 1
router-id 192.168.4.4
log-adjacency-changes
network 10.1.1.0 0.0.0.255 area 0
network 192.168.4.4 0.0.0.0 area 4
!
------------------------------------------------------------------------
-----------------
On Router B
interface Serial0/0
no ip address
encapsulation frame-relay
no arp frame-relay
no frame-relay inverse-arp
!
interface Serial0/0.44 multipoint
frame-relay interface-dlci 504 ppp Virtual-Template1
!
interface Virtual-Template1
ip address 10.1.1.1 255.255.255.0
!
router ospf 1
router-id 192.168.5.5
log-adjacency-changes
network 10.1.1.1 0.0.0.0 area 0
------------------------------------------------------------------------
-----------------
Router5#sh ip osp nei
Neighbor ID Pri State Dead Time Address
Interface
192.168.4.4 0 FULL/ - 00:00:36 10.1.1.2
Virtual-Access2
Show ip route
192.168.4.0/32 is subnetted, 1 subnets
O IA 192.168.4.4 [110/2] via 10.1.1.2, 00:03:36, Virtual-Access2
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jaycee Cockburn - BCX SS
Sent: 09 August 2005 02:19 PM
To: Shanky
Cc: lab
Subject: RE: OSPF Over FR Problem
Hi S,
I see what you mean...sorry. I think the PPPoFR will probably work, will
have to check it out. Have you tried it?
Cheers
JC
-----Original Message-----
From: Shanky [mailto:shankyz@gmail.com]
Sent: 09 August 2005 01:50 PM
To: Jaycee Cockburn - BCX SS
Cc: lab
Subject: RE: OSPF Over FR Problem
Thanks for your reply,
But your solution refers to the OSPF network type Point-to-Multipoint
which is not default for the Multipoint Interface. The default OSPF
network type for Physical and Point-to-Multipoint is NBMA, which will
not create ptp links to all the neighbors.
For NBMA network type, OSPF will treat it like broadcast and a DR will
be elected.
The issue is even though full adjacency is established between R1 & R2
by tweaking the timers, there is no routes flow between them, and as the
scenario forbids me from changing the network type on any router.. how
do I establish connectivity for all networks ?
Thanks
Shanky
-----Original Message-----
From: Jaycee Cockburn - BCX SS [mailto:Jaycee.Cockburn@bcx.co.za]
Sent: Tuesday, August 09, 2005 4:09 PM
To: Shanky
Cc: lab
Subject: RE: OSPF Over FR Problem
Hi S,
OSPF PtMP interface creates PtP links to all the neighbors, but the
timers (hello & dead) are not the same. For PtP the hello/dead = 10/40
secs and for PtMP = 30/120 secs.
By changing either one's timers to match the others you will get
neighbor relations going and adjacencies will form. (under interface do
"ip ospf hello <time in secs>"
The following must match to form adjacencies:
1. Area
2. Mask
3. Authentication info
4. Hello timer
5. Dead timer
HTH
Cheers
JC
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Shanky
Sent: 09 August 2005 11:24 AM
To: Alexander Arsenyev (GU/ETL)
Cc: lab
Subject: Re: OSPF Over FR Problem
Thanks for the link, but in fact the lab is asking for the same type of
configs...the scenarios says R1(mp if) -------- R2(p2p if ) and you are
not allowed to change the network type. So, clearly there is a network
type mismatch here, but how to establish full connectivity without
changing the network type ?
Thanks
On 8/9/05, Alexander Arsenyev (GU/ETL)
<alexander.arsenyev@ericsson.com>
wrote:
>
> Good place to start from:
> http://www.cisco.com/warp/public/104/26.html#r1
>
> If You are asking for resources on Your specific mismatch situation
> (non-broadcast vs point-to-point) then it's best to start with OSPF
> database lookup "show ip ospf data"...
> HTH
> Cheers
> Alex
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Shanky
> Sent: 09 August 2005 08:11
> To: lab
> Subject: OSPF Over FR Problem
>
>
> Hi,
> The connections are
> R1 -------------------------------------- R2 (p2p)
> 1.1.1.2<http://1.1.1.2>< http://1.1.1.2> p2mp
> 1.1.1.1 <http://1.1.1.1> <http://1.1.1.1> with default ospf network
> types, R1(NBMA) and R2(P2P) I have done ip ospf prio 0 on R2 subif and
> neighbor 1.1.1.2 <http://1.1.1.2> <http://1.1.1.2> on R1 ip ospf
> hello-interval 10 on R1 so, the adjacency is full on both routers. R1
> is the DR on this segment.
> But no routes are flowing from R2 to R1... why?
> Can anyone point me to some resource for such mismatched network types
> and their config details ?
> TIA
> Shanky
>
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