OSPF networks

 Configure OSPF for the above network diagram. You will need to configure OSPF for the Area 0 and Area 24 Fram relay network using the default OSPF network mode (no ip ospf network statements may be used on any router in these areas). R3's interface connecting to Area 356 needs to be configured for the OSPF RFC standard point-to-multipoint mode. R5 and R6 must use the default OSPF mode (no ip ospf network statements may be used on R5 and R6).

Each OSPF router has a single loopback interface. These should be advertised through the OSPF network. The loopback interfaces of the ABRs can be inclouded in either area.

Ensure only appropriate routers have DR/BDR status.

In order to achieve full connectivity, you may need to add additional Frame-Relay maps to your routers. However, you may not add additional Frame-Relay PVCs by modifying the FRS devices.

Solutions

NBMA: must be configured "neighbor xxxx" command on router ospf 1 to establish neighbor relationship
Point-to-Point: automatically establishs neighbor relationship.

Point-to-multipoint: hello time on all routers must be same. Change R3 hello time as '10' on interface s0/1.1


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Configurations

R1>

interface Loopback0
 ip address 1.1.1.1 255.255.255.0
 ip ospf network point-to-point
!    
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 64000
 no frame-relay inverse-arp
!
interface Serial0/0.1 multipoint
 ip address 10.12.3.1 255.255.255.0
 snmp trap link-status
 frame-relay map ip 10.12.3.3 103 broadcast
 frame-relay map ip 10.12.3.2 102 broadcast
!  
router ospf 1
 router-id 1.1.1.1
 log-adjacency-changes
 network 1.1.1.1 0.0.0.0 area 0
 network 10.12.3.0 0.0.0.255 area 0
 neighbor 10.12.3.2
 neighbor 10.12.3.3

R2

interface Loopback0
 ip address 2.2.2.2 255.255.255.0
 ip ospf network point-to-point
!
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 64000
 no frame-relay inverse-arp
!
interface Serial0/0.1 multipoint
 ip address 10.12.3.2 255.255.255.0
 ip ospf priority 0
 snmp trap link-status
 frame-relay map ip 10.12.3.3 201 broadcast
 frame-relay map ip 10.12.3.1 201 broadcast
!
interface Serial0/1
 no ip address
 encapsulation frame-relay
 clock rate 64000
 no frame-relay inverse-arp
!
interface Serial0/1.1 point-to-point
 ip address 10.24.0.2 255.255.255.0
 snmp trap link-status
 frame-relay interface-dlci 204
!
router ospf 1
 router-id 2.2.2.2
 log-adjacency-changes
 network 2.2.2.2 0.0.0.0 area 0
 network 10.12.3.0 0.0.0.255 area 0

 network 10.24.0.2 0.0.0.0 area 24

R3>

interface Loopback0
 ip address 3.3.3.3 255.255.255.0
 ip ospf network point-to-point
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!      
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 64000
 no frame-relay inverse-arp
!
interface Serial0/0.1 multipoint
 ip address 10.12.3.3 255.255.255.0
 ip ospf priority 0
 snmp trap link-status
 frame-relay map ip 10.12.3.2 301 broadcast
 frame-relay map ip 10.12.3.1 301 broadcast
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/1
 no ip address
 encapsulation frame-relay
 clock rate 64000
 no frame-relay inverse-arp
!
interface Serial0/1.1 multipoint
 ip address 10.35.6.3 255.255.255.0
 ip ospf network point-to-multipoint
 ip ospf hello-interval 10
 snmp trap link-status
 frame-relay map ip 10.35.6.6 306 broadcast
 frame-relay map ip 10.35.6.5 305 broadcast
!
router ospf 1
 router-id 3.3.3.3
 log-adjacency-changes
 network 3.3.3.3 0.0.0.0 area 0
 network 10.12.3.0 0.0.0.255 area 0
 network 10.35.6.3 0.0.0.0 area 356

R4>

interface Loopback0
 ip address 4.4.4.4 255.255.255.0
 ip ospf network point-to-point
!  
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 64000
 no frame-relay inverse-arp
!
interface Serial0/0.1 point-to-point
 ip address 10.24.0.4 255.255.255.0
 snmp trap link-status
 frame-relay interface-dlci 402
!
router ospf 1
 router-id 4.4.4.4
 log-adjacency-changes
 network 4.4.4.4 0.0.0.0 area 24
 network 10.24.0.0 0.0.0.255 area 24

R5>

interface Loopback0
 ip address 5.5.5.5 255.255.255.0
 ip ospf network point-to-point
!
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 64000
 no frame-relay inverse-arp
!
interface Serial0/0.1 point-to-point
 ip address 10.35.6.5 255.255.255.0
 snmp trap link-status
 frame-relay interface-dlci 503
!
router ospf 1
 router-id 5.5.5.5
 log-adjacency-changes
 network 5.5.5.5 0.0.0.0 area 356
 network 10.35.6.0 0.0.0.255 area 356

R6>

interface Loopback0
 ip address 6.6.6.6 255.255.255.0
 ip ospf network point-to-point
!    
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 64000
 no frame-relay inverse-arp
!
interface Serial0/0.1 point-to-point
 ip address 10.35.6.6 255.255.255.0
 snmp trap link-status
 frame-relay interface-dlci 603
!
router ospf 1
 router-id 6.6.6.6
 log-adjacency-changes
 network 6.6.6.6 0.0.0.0 area 356
 network 10.35.6.0 0.0.0.255 area 356

FRS1,2 and 3>

frame-relay switching
!
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 2000000
 frame-relay intf-type dce
 frame-relay route 102 interface Serial0/1 201
 frame-relay route 103 interface Serial0/2 301
 frame-relay route 104 interface Serial0/3 401
 frame-relay route 105 interface Serial0/4 501
 frame-relay route 106 interface Serial0/5 601
!
interface Serial0/1
 no ip address
 encapsulation frame-relay
 clock rate 2000000
 frame-relay intf-type dce
 frame-relay route 201 interface Serial0/0 102
 frame-relay route 203 interface Serial0/2 302
 frame-relay route 204 interface Serial0/3 402
 frame-relay route 205 interface Serial0/4 502
 frame-relay route 206 interface Serial0/5 602
!
interface Serial0/2
 no ip address
 encapsulation frame-relay
 clock rate 2000000
 frame-relay intf-type dce
 frame-relay route 301 interface Serial0/0 103
 frame-relay route 302 interface Serial0/1 203
 frame-relay route 304 interface Serial0/3 403
 frame-relay route 305 interface Serial0/4 503
 frame-relay route 306 interface Serial0/5 603
!
interface Serial0/3
 no ip address
 encapsulation frame-relay
 clock rate 2000000
 frame-relay intf-type dce
 frame-relay route 401 interface Serial0/0 104
 frame-relay route 402 interface Serial0/1 204
 frame-relay route 403 interface Serial0/2 304
 frame-relay route 405 interface Serial0/4 504
 frame-relay route 406 interface Serial0/5 604
!
interface Serial0/4
 no ip address
 encapsulation frame-relay
 clock rate 2000000
 frame-relay intf-type dce
 frame-relay route 501 interface Serial0/0 105
 frame-relay route 502 interface Serial0/1 205
 frame-relay route 503 interface Serial0/2 305
 frame-relay route 504 interface Serial0/3 405
 frame-relay route 506 interface Serial0/5 605
!
interface Serial0/5
 no ip address
 encapsulation frame-relay
 clock rate 2000000
 frame-relay intf-type dce
 frame-relay route 601 interface Serial0/0 106
 frame-relay route 602 interface Serial0/1 206
 frame-relay route 603 interface Serial0/2 306
 frame-relay route 604 interface Serial0/3 406
 frame-relay route 605 interface Serial0/4 506