hostname r1

!

!

!

interface Loopback0

ip address 10.1.1.1 255.255.255.0

!

interface Serial0/0

no ip address

encapsulation frame-relay

frame-relay interface-dlci 103 ppp Virtual-Template1

no frame-relay inverse-arp

!

interface Virtual-Template1

ip unnumbered Loopback0

ip ospf authentication message-digest

ip ospf message-digest-key 1 md5 cisco

!

router ospf 1

area 0 authentication message-digest

network 10.1.1.0 0.0.0.255 area 0

r1#sh ip route

40.0.0.0/32 is subnetted, 1 subnets

O 40.1.1.1 [110/3] via 30.1.1.1, 00:14:38, Virtual-Access1

10.0.0.0/24 is subnetted, 1 subnets

C 10.1.1.0 is directly connected, Loopback0

30.0.0.0/32 is subnetted, 1 subnets

C 30.1.1.1 is directly connected, Virtual-Access1

r1#

r1#sh ip ospf nei

Neighbor ID Pri State Dead Time Address Interface

30.1.1.1 1 FULL/ - 00:00:37 30.1.1.1 Virtual-Access1

r1#

r1#sh ip int brief

Interface IP-Address OK? Method Status Protocol

Ethernet0/0 unassigned YES unset administratively down down

Serial0/0 unassigned YES unset up up

Serial0/1 unassigned YES unset administratively down down

Virtual-Access1 10.1.1.1 YES TFTP up up

Virtual-Template1 10.1.1.1 YES manual down down

Loopback0 10.1.1.1 YES manual up up

r1#

r1#ping 30.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 30.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 4/6/8 ms

r1#ping 40.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 40.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 8/9/12 ms

================================================

hostname r3

interface Loopback0

ip address 30.1.1.1 255.255.255.0

!

interface Serial0/0

no ip address

encapsulation frame-relay

no frame-relay inverse-arp

!

interface Serial0/0.1 multipoint

frame-relay interface-dlci 301 ppp Virtual-Template1

frame-relay interface-dlci 304 ppp Virtual-Template2

!

interface Virtual-Template1

ip unnumbered Loopback0

ip ospf authentication message-digest

ip ospf message-digest-key 1 md5 cisco

!

interface Virtual-Template2

ip unnumbered Loopback0

!

router ospf 1

area 0 authentication message-digest

network 30.1.1.0 0.0.0.255 area 0

r3# sh ip ospf nei

Neighbor ID Pri State Dead Time Address Interface

40.1.1.1 0 FULL/ - 00:00:30 40.1.1.1 Virtual-Access1

10.1.1.1 0 FULL/ - 00:00:34 10.1.1.1 Virtual-Access3

r3#

r3#sh ip route

Gateway of last resort is not set

40.0.0.0/32 is subnetted, 1 subnets

C 40.1.1.1 is directly connected, Virtual-Access1

10.0.0.0/32 is subnetted, 1 subnets

C 10.1.1.1 is directly connected, Virtual-Access3

30.0.0.0/24 is subnetted, 1 subnets

C 30.1.1.0 is directly connected, Loopback0

r3#

r3#sh ip int brie

Interface IP-Address OK? Method Status Protocol

FastEthernet0/0 unassigned YES unset administratively down down

Serial0/0 unassigned YES unset up up

Serial0/0.1 unassigned YES unset up up

Serial0/0.2 unassigned YES unset deleted down

BRI0/0 unassigned YES unset administratively down down

BRI0/0:1 unassigned YES unset administratively down down

BRI0/0:2 unassigned YES unset administratively down down

Serial0/1 unassigned YES unset administratively down down

Virtual-Access1 30.1.1.1 YES TFTP up up

Virtual-Template1 30.1.1.1 YES TFTP down down

Virtual-Access2 unassigned YES unset down down

Virtual-Template2 30.1.1.1 YES TFTP down down

Virtual-Access3 30.1.1.1 YES TFTP up up

Loopback0 30.1.1.1 YES manual up up

r3#

r3#p 10.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 4/5/8 ms

r3#p 40.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 40.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 4/6/8 ms

----------------------------------------------------------------------------------------

hostname r4

interface Loopback0

ip address 40.1.1.1 255.255.255.0

!

interface Serial0/0

no ip address

encapsulation frame-relay

frame-relay interface-dlci 403 ppp Virtual-Template1

no frame-relay inverse-arp

!

interface Virtual-Template1

ip unnumbered Loopback0

router ospf 1

area 0 authentication message-digest

network 40.1.1.0 0.0.0.255 area 0

r4# sh ip ospf nei

Neighbor ID Pri State Dead Time Address Interface

30.1.1.1 0 FULL/ - 00:00:33 30.1.1.1 Virtual-Access1

r4#

r4#sh ip route

40.0.0.0/24 is subnetted, 1 subnets

C 40.1.1.0 is directly connected, Loopback0

10.0.0.0/32 is subnetted, 1 subnets

O 10.1.1.1 [110/65537] via 30.1.1.1, 00:25:47, Virtual-Access1

30.0.0.0/32 is subnetted, 1 subnets

C 30.1.1.1 is directly connected, Virtual-Access1

r4#

r4#sh ip int brie

Interface IP-Address OK? Method Status Protocol

Ethernet0/0 unassigned YES unset administratively down down

Serial0/0 unassigned YES unset up up

TokenRing0/0 unassigned YES unset administratively down down

Serial0/1 unassigned YES unset administratively down down

Ethernet3/0 unassigned YES unset administratively down down

TokenRing3/0 unassigned YES unset administratively down down

Virtual-Access1 40.1.1.1 YES TFTP up up

Virtual-Template1 40.1.1.1 YES TFTP down down

Virtual-Access2 unassigned YES unset down down

Loopback0 40.1.1.1 YES manual up up

r4#

r4#p 10.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 8/10/12 ms

r4#p 30.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 30.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/8 ms