From: haluk (haluk@xxxxxxxxx)
Date: Thu Feb 07 2002 - 03:25:17 GMT-3
Hi Carl,
When you use multipoint interface type, it means that OSPF is running NBMA
and in that Access mode, All routers have a neighbor relationship with
designated router and they exchange all LSAs via Designated router. Since
you set OSPF priority 200 on r1 router ( which is hub router and it should
be like that) R1 is elected as a designated router and it is sending all
LSAs to all spoke routers. You don't need to put second neighbor on r2 and
r3 for each other. I hope that helps.
Haluk
----- Original Message -----
From: "Carl Phelan" <carlphelan@hotmail.com>
To: "Emmanuel Oppong" <e-oppong@attbi.com>; <ccielab@groupstudy.com>
Sent: Wednesday, February 06, 2002 3:12 PM
Subject: Re: Solie and Skynet - Practice Lab 1
> As you can see below, the timers are the same for all 3 routers as the
hello
> interval on R3 must be 60 secs. - so must the other 2 routers in the frame
> in order to peer. Many thanks for your reply. I did put a neighbor
> statement on both R2 and
> R3 in OSPF config mode - weird thing is it doesn't show up in 'sh run' but
> changes the OSPF neighbor state from nothing to ATTEMPT. I am using the
> following IOS:
>
> System image file is "flash:c2500-ins-l.120-15.bin" on all 3 routers.
>
>
>
>
> R2#sh ip ospf int
> Serial1 is up, line protocol is up
> Internet Address 140.100.4.2/24, Area 0
> Process ID 1, Router ID 140.100.4.2, Network Type NON_BROADCAST, Cost:
64
> Transmit Delay is 1 sec, State DROTHER, Priority 0
> Designated Router (ID) 140.100.4.1, Interface address 140.100.4.1
> No backup designated router on this network
> Timer intervals configured, Hello 60, Dead 240, Wait 240, Retransmit 5
> Hello due in 00:00:39
> Neighbor Count is 1, Adjacent neighbor count is 1
> Adjacent with neighbor 140.100.4.1 (Designated Router)
> Suppress hello for 0 neighbor(s)
>
> R1#sh ip ospf int s0.2
> Serial0.2 is up, line protocol is up
> Internet Address 140.100.4.1/24, Area 0
> Process ID 1, Router ID 140.100.4.1, Network Type NON_BROADCAST, Cost:
64
> Transmit Delay is 1 sec, State DR, Priority 1
> Designated Router (ID) 140.100.4.1, Interface address 140.100.4.1
> No backup designated router on this network
> Timer intervals configured, Hello 60, Dead 240, Wait 240, Retransmit 5
> Hello due in 00:00:23
> Neighbor Count is 2, Adjacent neighbor count is 2
> Adjacent with neighbor 140.100.4.2
> Adjacent with neighbor 140.100.4.3
> Suppress hello for 0 neighbor(s)
>
> R3#sh ip ospf int
> Serial0 is up, line protocol is up
> Internet Address 140.100.4.3/24, Area 0
> Process ID 1, Router ID 140.100.4.3, Network Type NON_BROADCAST, Cost:
64
> Transmit Delay is 1 sec, State DROTHER, Priority 0
> Designated Router (ID) 140.100.4.1, Interface address 140.100.4.1
> No backup designated router on this network
> Timer intervals configured, Hello 60, Dead 240, Wait 240, Retransmit 5
> Hello due in 00:00:14
> Neighbor Count is 1, Adjacent neighbor count is 1
> Adjacent with neighbor 140.100.4.1 (Designated Router)
> Suppress hello for 0 neighbor(s)
>
> ----- Original Message -----
> From: "Emmanuel Oppong" <e-oppong@attbi.com>
> To: "Carl Phelan" <carlphelan@hotmail.com>; <ccielab@groupstudy.com>
> Cc: <e-oppong@attbi.com>
> Sent: Wednesday, February 06, 2002 10:56 PM
> Subject: RE: Solie and Skynet - Practice Lab 1
>
>
> > You must use a multipoint interface on r2 or use "ip ospf netwwork
> > point-to-multipoint" on both interfaces. BUT the lab states that you
> cannot
> > use any "ip ospf network .." statement, so you have to use a multipoint
> > interface. This will make the interface timers the same. If you do "sh
> ip
> > ospf int s0" on r2 and "sh ip ospf int s0.2" on r1, you see that they
have
> > different timer values. For adjacency you need the same timer values.
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > Carl Phelan
> > Sent: Wednesday, February 06, 2002 2:27 PM
> > To: ccielab@groupstudy.com
> > Subject: Solie and Skynet - Practice Lab 1
> >
> >
> > Hi All,
> >
> > I am having problems with this lab trying to get R2 and R3 to OSPF peer
> over
> > hub and spoke Frame Relay . R1 is the hub and both R2 and R3 the
spokes.
> I
> > include the relevant config excerpts. Both R2 and R3 can ping each
> other -
> > R1
> > is in a full state with both R2 and R3 so where am I going wrong?
> >
> > Many thanks for your help.
> >
> >
> >
> >
> > R1
> > interface Serial0
> > no ip address
> > no ip directed-broadcast
> > encapsulation frame-relay
> > ip ospf priority 200
> > no ip mroute-cache
> > logging event subif-link-status
> > logging event dlci-status-change
> > no arp frame-relay
> > no frame-relay inverse-arp
> > frame-relay lmi-type ansi
> > ....
> > interface Serial0.2 multipoint
> > ip address 140.100.4.1 255.255.255.0
> > no ip directed-broadcast
> > ip ospf hello-interval 60
> > frame-relay map ip 140.100.4.2 110 broadcast
> > frame-relay map ip 140.100.4.3 120 broadcast
> > ....
> > router ospf 1
> > network 140.100.4.0 0.0.0.255 area 0
> > neighbor 140.100.4.3
> > neighbor 140.100.4.2
> >
> > R1#sh ip ospf ne
> >
> > Neighbor ID Pri State Dead Time Address
> Interface
> > 140.100.4.2 0 FULL/DROTHER 00:03:43 140.100.4.2
> Serial0.2
> > 140.100.4.3 0 FULL/DROTHER 00:03:55 140.100.4.3
> Serial0.2
> >
> >
> > R2
> > interface Serial1
> > bandwidth 64
> > ip address 140.100.4.2 255.255.255.0
> > no ip directed-broadcast
> > encapsulation frame-relay
> > ip ospf hello-interval 60
> > ip ospf priority 0
> > logging event subif-link-status
> > logging event dlci-status-change
> > frame-relay map ip 140.100.4.1 111 broadcast
> > frame-relay map ip 140.100.4.3 111 broadcast
> > frame-relay lmi-type ansi
> > ....
> > router ospf 1
> > network 140.100.4.0 0.0.0.255 area 0
> > ...
> > R2#sh ip ospf ne
> >
> > Neighbor ID Pri State Dead Time Address
> Interface
> > 140.100.4.1 1 FULL/DR 00:03:25 140.100.4.1
Serial1
> > N/A 0 ATTEMPT/DROTHER - 140.100.4.3
Serial1
> >
> >
> > R3
> > interface Serial0
> > ip address 140.100.4.3 255.255.255.0
> > no ip directed-broadcast
> > encapsulation frame-relay
> > ip ospf hello-interval 60
> > ip ospf priority 0
> > no ip mroute-cache
> > logging event subif-link-status
> > logging event dlci-status-change
> > frame-relay map ip 140.100.4.1 121 broadcast
> > frame-relay map ip 140.100.4.2 121 broadcast
> > frame-relay lmi-type ansi
> > ....
> > router ospf 1
> > network 140.100.4.0 0.0.0.255 area 0
> > ....
> > R3#sh ip ospf ne
> >
> > Neighbor ID Pri State Dead Time Address
> Interface
> > 140.100.4.1 1 FULL/DR 00:03:49 140.100.4.1
Serial0
> > N/A 0 ATTEMPT/DROTHER - 140.100.4.2
Serial0
> > R3#ping 140.100.4.2
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 140.100.4.2, timeout is 2 seconds:
> > !!!!!
> > Success rate is 100 percent (5/5), round-trip min/avg/max = 112/117/128
ms
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