Re: OSPF problem..pls help.

things look ok but why area mismatch?

On Sun, Sep 13, 2009 at 6:21 PM, Naufal Jamal <naufalccie_at_yahoo.in> wrote:

> R2(config-router)#do sh ip ospf int s0/0
> Serial0/0 is up, line protocol is up
> Internet Address 1.1.24.2/24, Area 2
> Process ID 1, Router ID 2.2.2.2, Network Type POINT_TO_POINT, Cost: 64
> Transmit Delay is 1 sec, State POINT_TO_POINT
> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
> oob-resync timeout 40
> Hello due in 00:00:07
> Supports Link-local Signaling (LLS)
> Cisco NSF helper support enabled
> IETF NSF helper support enabled
> Index 1/1, flood queue length 0
> Next 0x0(0)/0x0(0)
> Last flood scan length is 0, maximum is 0
> Last flood scan time is 0 msec, maximum is 0 msec
> Neighbor Count is 1, Adjacent neighbor count is 0
> Suppress hello for 0 neighbor(s)
>
> R4(config-router)#do sh ip ospf int s0/1/0
> Serial0/1/0 is up, line protocol is up
> Internet Address 1.1.24.4/24, Area 2
> Process ID 1, Router ID 4.4.4.4, Network Type POINT_TO_POINT, Cost: 64
> Transmit Delay is 1 sec, State POINT_TO_POINT
> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
> oob-resync timeout 40
> Hello due in 00:00:05
> Supports Link-local Signaling (LLS)
> Cisco NSF helper support enabled
> IETF NSF helper support enabled
> Index 1/2, flood queue length 0
> Next 0x0(0)/0x0(0)
> Last flood scan length is 0, maximum is 0
> Last flood scan time is 0 msec, maximum is 0 msec
> Neighbor Count is 0, Adjacent neighbor count is 0
> Suppress hello for 0 neighbor(s)
>
> Here you go...
> --- On Sun, 13/9/09, Steve Lyons <charter21p5_at_gmail.com> wrote:
>
>
> From: Steve Lyons <charter21p5_at_gmail.com>
> Subject: Re: OSPF problem..pls help.
> To: "Mohamed El Henawy" <m.henawy_at_link.net>
> Cc: "Divin Mathew John" <divinjohn_at_gmail.com>, "Naufal Jamal"
> <naufalccie_at_yahoo.in>, ccielab_at_groupstudy.com
> Date: Sunday, 13 September, 2009, 2:14 PM
>
>
>
> Send me the output of "show ip ospf int x" for the Layer3 interface on each
> side.
>
> Steve Lyons
>
>
> On Sun, Sep 13, 2009 at 9:08 AM, Mohamed El Henawy <m.henawy_at_link.net>
> wrote:
>
>
>
> They are already
>
>
> network 1.1.24.4 0.0.0.0 area 2
>
> network 1.1.24.2 0.0.0.0 area 2
>
>
>
>
> ----- Original Message -----
> From: Steve Lyons
> To: Mohamed El Henawy
>
>
>
> Cc: Divin Mathew John ; Naufal Jamal ; ccielab_at_groupstudy.com
> Sent: Sunday, September 13, 2009 5:02 PM
> Subject: Re: OSPF problem..pls help.
>
>
> Bottom line: Both OSPF neighbors are required to be in the same area.
>
> Steve Lyons
>
>
> On Sun, Sep 13, 2009 at 8:20 AM, Mohamed El Henawy <m.henawy_at_link.net>
> wrote:
>
> I think Serial0/0/0 is already on another area and due to dynamic FR
> Mapping
> its getting this packet from 1.1.24.2 which is in Area 2 on this interface
> while it should get it on Serial0/1/0
>
>
>
> ----- Original Message ----- From: "Steve Lyons" <charter21p5_at_gmail.com>
> To: "Divin Mathew John" <divinjohn_at_gmail.com>
> Cc: "Naufal Jamal" <naufalccie_at_yahoo.in>; <ccielab_at_groupstudy.com>
> Sent: Sunday, September 13, 2009 4:11 PM
>
> Subject: Re: OSPF problem..pls help.
>
>
>
>
>
>
> Good catch. I didn't even notice. :) Check your configuration on both
> sides. It appears you have a mismatch of area type.
>
> router ospf 1
> log-adjacency-changes
> network 1.1.4.4 0.0.0.0 area 0 <====== does this match on the other side.
>
>
> Keep in mind the ospf hello packet has an area-id field and if this does
> not
> match on both sides then the adjacency will not be formed.
>
> Below is an example of packet structure I found searching google:
>
> http://routemyworld.com/wp-content/uploads/2008/07/ospf-packet-header.jpg
>
> Also here is some reading on why neighbors might not form:
>
>
> http://supportwiki.cisco.com/ViewWiki/index.php/OSPF_routers_do_not_form_neig
> hbor_relationship_due_to_a_mismatch_in_hello_parameters
>
> Steve Lyons
>
>
>
>
> On Sun, Sep 13, 2009 at 8:56 AM, Divin Mathew John
> <divinjohn_at_gmail.com>wrote:
>
>
>
>
>
> *Sep 13 11:20:38.243: OSPF: Rcv pkt from 1.1.24.2, Serial0/0/0, area
> 0.0.0.0
> mismatch area 0.0.0.2 in the header??
>
>
> On Sun, Sep 13, 2009 at 6:19 PM, Steve Lyons <charter21p5_at_gmail.com>wrote:
>
>
> Ping 224.0.0.5 and source it from the ptp interface. Let me know if you
> get
> a response.
>
> Steve Lyons
>
> On Sun, Sep 13, 2009 at 6:16 AM, Naufal Jamal <naufalccie_at_yahoo.in>
> wrote:
>
> > Hi,
> >
> > I have a full-mesh of ospf network but having problems between R4 and >
> R2
> > point-to-point network type .here is the config/debug on both the
> > routers.the
> > neighbourship never comes up.
> >
> >
> > R4
> >
> > interface Serial0/1/0
> > ip address 1.1.24.4 255.255.255.0
> > encapsulation frame-relay
> > ip ospf network point-to-point
> > frame-relay map ip 1.1.24.4 402
> > frame-relay map ip 1.1.24.2 402 broadcast
> > no frame-relay inverse-arp
> > end
> >
> > R4
> >
> > (config-if)#do debug ip ospf ev
> > OSPF events debugging is on
> > R4(config-if)#
> > *Sep 13 11:20:38.131: OSPF: Send hello to 224.0.0.5 area 2 on
> Serial0/1/0
> > from
> > 1
> > .1.24.4
> > *Sep 13 11:20:38.243: OSPF: Rcv pkt from 1.1.24.2, Serial0/0/0, area
> > 0.0.0.0
> > mismatch area 0.0.0.2 in the header
> >
> > sh ip ospf ne
> > Neighbor ID Pri State Dead Time Address
> Interface
> > 1.1.3.3 1 FULL/DROTHER 00:01:51 1.1.100.3
> > Serial0/0/0
> > 1.1.6.6 1 FULL/BDR 00:01:47 1.1.100.6
> > Serial0/0/0
> >
> > router ospf 1
> > log-adjacency-changes
> > network 1.1.4.4 0.0.0.0 area 0
> > network 1.1.24.4 0.0.0.0 area 2
> > network 1.1.100.4 0.0.0.0 area 0
> > neighbor 1.1.100.3
> > neighbor 1.1.100.6
> >
> > R2
> >
> >
> > R2(config-if)#
> > *Mar 1 16:50:33.663: OSPF: Send hello to 224.0.0.5 area 2 on
> > FastEthernet0/0
> > fr
> > om 1.1.26.2
> > *Mar 1 16:50:34.491: OSPF: Rcv hello from 1.1.4.4 area 2 from >
> Serial0/0
> > 1.1.24.
> > 4
> > *Mar 1 16:50:34.491: OSPF: Send immediate hello to nbr 1.1.4.4, src
> > address
> > 1.1
> > .24.4, on Serial0/0
> > *Mar 1 16:50:34.495: OSPF: Send hello to 224.0.0.5 area 2 on > Serial0/0
> > from
> > 1.1
> > .24.2
> > *Mar 1 16:50:34.495: OSPF: End o
> > *Mar 1 16:58:55.403: OSPF: Rcv hello from 1.1.6.6 area 2 from
> > FastEthernet0/0
> > 1
> > .1.26.6
> > *Mar 1 16:58:55.403: OSPF: End of hello processing
> > R2(config-if)#
> > R2(config-if)#do
> > *Mar 1 16:58:58.567: OSPF: Send hello to 224.0.0.5 area 2 on > Serial0/0
> > from
> > 1.1
> > .24.2
> > R2(config-if)#do u all
> > All possible debugging has been turned off
> > R2(config-if)#do sh ip ospf ne
> > Neighbor ID Pri State Dead Time Address
> Interface
> > 1.1.4.4 0 INIT/ - 00:00:32 1.1.24.4
> Serial0/0
> > 1.1.6.6 1 FULL/BDR 00:00:33 1.1.26.6
> > FastEthernet0/0
> >
> > interface Serial0/0
> > ip address 1.1.24.2 255.255.255.0
> > encapsulation frame-relay
> > ip ospf network point-to-point
> > frame-relay map ip 1.1.24.2 204
> > frame-relay map ip 1.1.24.4 204 broadcast
> > no frame-relay inverse-arp
> > frame-relay lmi-type cisco
> > end
> >
> > router ospf 1
> > log-adjacency-changes
> > network 1.1.2.2 0.0.0.0 area 2
> > network 1.1.24.2 0.0.0.0 area 2
> > network 1.1.26.2 0.0.0.0 area 2
> >
> > neighborship with R3 and R6 is o.k dont understand why it is not comin
> up
> > between R2 and R4 p2p link...
> >
> > Thanks,
> > Naufal
> >
> >
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Received on Sun Sep 13 2009 - 18:33:54 ART