From: Paul Adams (paul.adams@xxxxxxxxxxxx)
Date: Tue Jan 23 2001 - 12:50:41 GMT-3
Greeting All,
While playing around on a few routers last night, I encountered the
following issue:
________
| |-----------------R2
R1---------- FS |
|_______ |-------------R4
The objective was to use Physical -no sub int's on R1 and Point to Point
ints on R2 & R3.
Exchange OSPF routes between hub and spokes with one restriction- NO ip
ospf network multipoint command- on R1 or point to point on R1
Is this doable? or is it a must to use point to multipoint in this
situation?
Please review the configs when the opportunity permits.
I also tried to set R1 ip ospf priority to zero so no one would
become the DR since P to P's do not support a DR but the
neighbors just stayed in INIT mode
In the following config, the neighbors become adjacent but no
routes are being exchanged......
Thanks for any insight....
R1 (HUB)
interface Serial0
ip address 172.16.1.1 255.255.255.0
no ip directed-broadcast
encapsulation frame-relay
no ip mroute-cache
frame-relay map ip 172.16.1.4 400 broadcast
frame-relay map ip 172.16.1.2 200 broadcast
frame-relay lmi-type ansi
R1#sh ip ospf ne
Neighbor ID Pri State Dead Time Address Interface
4.5.5.5 0 FULL/DROTHER 00:01:56 172.16.1.4 Serial0
8.8.8.8 0 FULL/DROTHER 00:01:42 172.16.1.2 Serial0
R1#sh ip ospf int s0
Serial0 is up, line protocol is up
Internet Address 172.16.1.1/24, Area 0
Process ID 1, Router ID 2.2.2.2, Network Type NON_BROADCAST, Cost: 64
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 2.2.2.2, Interface address 172.16.1.1
No backup designated router on this network
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
Hello due in 00:00:14
Neighbor Count is 2, Adjacent neighbor count is 2
Adjacent with neighbor 4.5.5.5
Adjacent with neighbor 8.8.8.8
Suppress hello for 0 neighbor(s)
R1#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
default
U - per-user static route, o - ODR
Gateway of last resort is not set
2.0.0.0/24 is subnetted, 3 subnets
C 2.0.0.0 is directly connected, Loopback32
C 2.1.1.0 is directly connected, Loopback1
C 2.2.2.0 is directly connected, Loopback0
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Serial0
****************************************************************************
****
R2 (spoke)
interface Serial0
no ip address
no ip directed-broadcast
encapsulation frame-relay
no ip mroute-cache
frame-relay lmi-type ansi
!
interface Serial0.1 point-to-point
ip address 172.16.1.2 255.255.255.0
no ip directed-broadcast
ip ospf hello-interval 30
ip ospf priority 0
frame-relay interface-dlci 200
R2#sh ip ospf ne (Note R1 int lo0 is 2.2.2.2 /24)
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 1 FULL/ - 00:01:45 172.16.1.1 Serial0.1
R2#sh ip ospf int s0.1
Serial0.1 is up, line protocol is up
Internet Address 172.16.1.2/24, Area 0
Process ID 1, Router ID 8.8.8.8, Network Type POINT_TO_POINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
Hello due in 00:00:17
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 2.2.2.2
Suppress hello for 0 neighbor(s)
R2#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
default
U - per-user static route, o - ODR
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Serial0.1
7.0.0.0/24 is subnetted, 3 subnets
C 7.9.9.0 is directly connected, Loopback2
C 7.8.8.0 is directly connected, Loopback1
C 7.7.7.0 is directly connected, Loopback0
8.0.0.0/24 is subnetted, 1 subnets
C 8.8.8.0 is directly connected, Loopback5
****************************************************************************
****************************************
R4 (spoke)
interface Serial0
no ip address
encapsulation frame-relay
!
interface Serial0.1 point-to-point
ip address 172.16.1.4 255.255.255.0
ip ospf hello-interval 30
ip ospf priority 0
frame-relay interface-dlci 400
R4#sh ip ospf ne
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 1 FULL/ - 00:01:58 172.16.1.1 Serial0.1
R4#sh ip ospf int s0.1
Serial0.1 is up, line protocol is up
Internet Address 172.16.1.4/24, Area 0
Process ID 1, Router ID 4.5.5.5, Network Type POINT_TO_POINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
Hello due in 00:00:08
Index 4/4, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 2.2.2.2
Suppress hello for 0 neighbor(s)
R4#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
4.0.0.0/24 is subnetted, 3 subnets
C 4.5.5.0 is directly connected, Loopback2
C 4.3.3.0 is directly connected, Loopback1
C 4.4.4.0 is directly connected, Loopback0
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Serial0.1
~~~~~~~~~~~~~~~~~~~~~~~~~~
Paul L. Adams
Callisma
Phone: 571-633-9784
Email: paul.adams@callisma.com
~~~~~~~~~~~~~~~~~~~~~~~~~~
Building your network of the future. Today.
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