8.3.3.6 Lab – Configuring Basic Single-Area OSPFv3 Answers

8.3.3.6 Lab – Configuring Basic Single-Area OSPFv3 (Instructor Version)

Instructor Note: Red font color or Gray highlights indicate text that appears in the instructor copy only.

Topology

Addressing Table

Objectives

Part 1: Build the Network and Configure Basic Device Settings
Part 2: Configure and Verify OSPFv3 Routing
Part 3: Configure OSPFv3 Passive Interfaces

Background / Scenario

Open Shortest Path First (OSPF) is a link-state routing protocol for IP networks. OSPFv2 is defined for IPv4 networks, and OSPFv3 is defined for IPv6 networks.

In this lab, you will configure the network topology with OSPFv3 routing, assign router IDs, configure passive interfaces, and use a number of CLI commands to display and verify OSPFv3 routing information.

Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services Routers (ISRs) with Cisco IOS Release 15.2(4)M3 (universalk9 image). Other routers and Cisco IOS versions can be used. Depending on the model and Cisco IOS version, the commands available and output produced might vary from what is shown in the labs. Refer to the Router Interface Summary Table at the end of this lab for the correct interface identifiers.

Note: Make sure that the routers have been erased and have no startup configurations. If you are unsure, contact your instructor.

Instructor Note: Refer to the Instructor Lab Manual for the procedures to initialize and reload devices.

Required Resources

• 3 Routers (Cisco 1941 with Cisco IOS Release 15.2(4)M3 universal image or comparable)
• 3 PCs (Windows with terminal emulation program, such as Tera Term)
• Console cables to configure the Cisco IOS devices via the console ports
• Ethernet and serial cables as shown in the topology

Part 1: Build the Network and Configure Basic Device Settings

In Part 1, you will set up the network topology and configure basic settings on the PC hosts and routers.

Step 1: Cable the network as shown in the topology.

Step 2: Initialize and reload the routers as necessary.

Step 3: Configure basic settings for each router.

a. Disable DNS lookup.

b. Configure device name as shown in the topology.

c. Assign class as the privileged EXEC password.

d. Assign cisco as the vty password.

e. Configure a MOTD banner to warn users that unauthorized access is prohibited.

f. Configure logging synchronous for the console line.

g. Encrypt plain text passwords.

h. Configure the IPv6 unicast and link-local addresses listed in the Addressing Table for all interfaces.

i. Enable IPv6 unicast routing on each router.

j. Copy the running configuration to the startup configuration.

Step 4: Configure PC hosts.

Step 5: Test connectivity.

The routers should be able to ping one another, and each PC should be able to ping its default gateway. The PCs are unable to ping other PCs until OSPFv3 routing is configured. Verify and troubleshoot if necessary.

Part 2: Configure OSPFv3 Routing

In Part 2, you will configure OSPFv3 routing on all routers in the network and then verify that routing tables are updated correctly.

Step 1: Assign router IDs.

OSPFv3 continues to use a 32 bit address for the router ID. Because there are no IPv4 addresses configured on the routers, you will manually assign the router ID using the router-id command.

a. Issue the ipv6 router ospf command to start an OSPFv3 process to the router.

R1(config)# ipv6 router ospf 1

Note: The OSPF process ID is kept locally and has no meaning to other routers on the network.

b. Assign the OSPFv3 router ID 1.1.1.1 to the R1.

R1(config-rtr)# router-id 1.1.1.1

c. Start the OSPFv3 routing process and assign a router ID of 2.2.2.2 to R2 and a router ID of 3.3.3.3 to R3.

d. Issue the show ipv6 ospf command to verify the router IDs on all routers.

R2# show ipv6 ospf
 Routing Process "ospfv3 1" with ID 2.2.2.2
 Event-log enabled, Maximum number of events: 1000, Mode: cyclic
 Router is not originating router-LSAs with maximum metric
 <output omitted>

Step 2: Configure OSPFv6 on R1.

With IPv6, it is common to have multiple IPv6 addresses configured on an interface. The network statement has been eliminated in OSPFv3. OSPFv3 routing is enabled at the interface level instead.

a. Issue the ipv6 ospf 1 area 0 command for each interface on R1 that is to participate in OSPFv3 routing.

R1(config)# interface g0/0
R1(config-if)# ipv6 ospf 1 area 0
R1(config-if)# interface s0/0/0
R1(config-if)# ipv6 ospf 1 area 0
R1(config-if)# interface s0/0/1
R1(config-if)# ipv6 ospf 1 area 0

Note: The process ID must match the process ID you used in Step1a.

b. Assign the interfaces on R2 and R3 to OSPFv3 area 0. You should see neighbor adjacency messages display when adding the interfaces to area 0.

R1#
*Mar 19 22:14:43.251: %OSPFv3-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial0/0/0 from
LOADING to FULL, Loading Done
R1#
*Mar 19 22:14:46.763: %OSPFv3-5-ADJCHG: Process 1, Nbr 3.3.3.3 on Serial0/0/1 from
LOADING to FULL, Loading Done

Step 3: Verify OSPFv3 neighbors.

Issue the show ipv6 ospf neighbor command to verify that the router has formed an adjacency with its neighboring routers. If the router ID of the neighboring router is not displayed, or if its state does not show as FULL, the two routers have not formed an OSPF adjacency.

R1# show ipv6 ospf neighbor  

           OSPFv3 Router with ID (1.1.1.1) (Process ID 1)  

Neighbor ID    Pri   State       Dead Time   Interface ID    Interface  
3.3.3.3          0   FULL/  -    00:00:39    6               Serial0/0/1  
2.2.2.2          0   FULL/  -    00:00:36    6               Serial0/0/0

Step 4: Verify OSPFv3 protocol settings.

The show ipv6 protocols command is a quick way to verify vital OSPFv3 configuration information, including the OSPF process ID, the router ID, and the interfaces enabled for OSPFv3.

IPv6 Routing Protocol is "connected"  
IPv6 Routing Protocol is "ND"  
IPv6 Routing Protocol is "ospf 1"  
  Router ID 1.1.1.1  
  Number of areas: 1 normal, 0 stub, 0 nssa  
  Interfaces (Area 0):  
    Serial0/0/1  
    Serial0/0/0  
    GigabitEthernet0/0  
  Redistribution:  
    None

Step 5: Verify OSPFv3 interfaces.

a. Issue the show ipv6 ospf interface command to display a detailed list for every OSPF-enabled interface.

R1# show ipv6 ospf interface 

Serial0/0/1 is up, line protocol is up 
  Link Local Address FE80::1, Interface ID 7  
  Area 0, Process ID 1, Instance ID 0, Router ID 1.1.1.1  
  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  
    Hello due in 00:00:05  
  Graceful restart helper support enabled  
  Index 1/3/3, flood queue length 0  
  Next 0x0(0)/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 3.3.3.3  
  Suppress hello for 0 neighbor(s)  
Serial0/0/0 is up, line protocol is up  
  Link Local Address FE80::1, Interface ID 6  
  Area 0, Process ID 1, Instance ID 0, Router ID 1.1.1.1  
  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  
    Hello due in 00:00:00  
  Graceful restart helper support enabled  
  Index 1/2/2, flood queue length 0  
  Next 0x0(0)/0x0(0)/0x0(0)  
  Last flood scan length is 1, maximum is 2  
  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)  
GigabitEthernet0/0 is up, line protocol is up  
  Link Local Address FE80::1, Interface ID 3  
  Area 0, Process ID 1, Instance ID 0, Router ID 1.1.1.1  
  Network Type BROADCAST, Cost: 1  
  Transmit Delay is 1 sec, State DR, Priority 1  
  Designated Router (ID) 1.1.1.1, local address FE80::1  
  No backup designated router on this network  
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5  
    Hello due in 00:00:03  
  Graceful restart helper support enabled  
  Index 1/1/1, flood queue length 0  
  Next 0x0(0)/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)

b. To display a summary of OSPFv3-enabled interfaces, issue the show ipv6 ospf interface brief command.

R1# show ipv6 ospf interface brief 

Interface    PID   Area         Intf ID    Cost  State Nbrs F/C  
Se0/0/1      1     0            7          64    P2P   1/1  
Se0/0/0      1     0            6          64    P2P   1/1  
Gi0/0        1     0            3          1     DR    0/0

Step 6: Verify the IPv6 routing table.

Issue the show ipv6 route command to verify that all networks are appearing in the routing table.

R2# show ipv6 route
IPv6 Routing Table - default - 10 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2
       IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external
       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
O   2001:DB8:ACAD:A::/64 [110/65]
     via FE80::1, Serial0/0/0
C   2001:DB8:ACAD:B::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   2001:DB8:ACAD:B::2/128 [0/0]
v    ia GigabitEthernet0/0, receive
O   2001:DB8:ACAD:C::/64 [110/65]
     via FE80::3, Serial0/0/1
C   2001:DB8:ACAD:12::/64 [0/0]
     via Serial0/0/0, directly connected
L   2001:DB8:ACAD:12::2/128 [0/0]
     via Serial0/0/0, receive
O   2001:DB8:ACAD:13::/64 [110/128]
     via FE80::3, Serial0/0/1
     via FE80::1, Serial0/0/0
C   2001:DB8:ACAD:23::/64 [0/0]
     via Serial0/0/1, directly connected
L   2001:DB8:ACAD:23::2/128 [0/0]
     via Serial0/0/1, receive
L   FF00::/8 [0/0]
     via Null0, receive

What command would you use to only see the OSPF routes in the routing table?
____________________________________________________
show ipv6 route ospf

Step 7: Verify end-to-end connectivity.

Each PC should be able to ping the other PCs in the topology. Verify and troubleshoot if necessary.

Note: It may be necessary to disable the PC firewall to ping between PCs.

Part 3: Configure OSPFv3 Passive Interfaces

The passive-interface command prevents routing updates from being sent through the specified router interface. This is commonly done to reduce traffic on the LANs as they do not need to receive dynamic routing protocol communication. In Part 3, you will use the passive-interface command to configure a single interface as passive. You will also configure OSPFv3 so that all interfaces on the router are passive by default, and then enable OSPF routing advertisements on selected interfaces.

Step 1: Configure a passive interface.

a. Issue the show ipv6 ospf interface g0/0 command on R1. Notice the timer indicating when the next Hello packet is expected. Hello packets are sent every 10 seconds and are used between OSPF routers to verify that their neighbors are up.

R1# show ipv6 ospf interface g0/0  

GigabitEthernet0/0 is up, line protocol is up   
  Link Local Address FE80::1, Interface ID 3  
  Area 0, Process ID 1, Instance ID 0, Router ID 1.1.1.1  
  Network Type BROADCAST, Cost: 1  
  Transmit Delay is 1 sec, State DR, Priority 1  
  Designated Router (ID) 1.1.1.1, local address FE80::1  
  No backup designated router on this network  
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5  
    Hello due in 00:00:05  
  Graceful restart helper support enabled  
  Index 1/1/1, flood queue length 0  
  Next 0x0(0)/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)

b. Issue the passive-interface command to change the G0/0 interface on R1 to passive.

R1(config)# ipv6 router ospf 1
R1(config-rtr)# passive-interface g0/0

c. Re-issue the show ipv6 ospf interface g0/0 command to verify that G0/0 is now passive.

R1# show ipv6 ospf interface g0/0  

GigabitEthernet0/0 is up, line protocol is up   
  Link Local Address FE80::1, Interface ID 3  
  Area 0, Process ID 1, Instance ID 0, Router ID 1.1.1.1  
  Network Type BROADCAST, Cost: 1  
  Transmit Delay is 1 sec, State WAITING, Priority 1  
  No designated router on this network  
  No backup designated router on this network  
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5  
    No Hellos (Passive interface)  
    Wait time before Designated router selection 00:00:34  
  Graceful restart helper support enabled  
  Index 1/1/1, flood queue length 0  
  Next 0x0(0)/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)

d. Issue the show ipv6 route ospf command on R2 and R3 to verify that a route to the 2001:DB8:ACAD:A::/64 network is still available.

R2# show ipv6 route ospf  

IPv6 Routing Table - default - 10 entries  
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route  
       B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2  
       IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external  
       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect  
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2  
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2  
O   2001:DB8:ACAD:A::/64 [110/65]  
     via FE80::1, Serial0/0/0  
O   2001:DB8:ACAD:C::/64 [110/65]  
     via FE80::3, Serial0/0/1  
O   2001:DB8:ACAD:13::/64 [110/128]  
     via FE80::3, Serial0/0/1  
     via FE80::1, Serial0/0/0

Step 2: Set passive interface as the default on the router.

a. Issue the passive-interface default command on R2 to set the default for all OSPFv3 interfaces as passive.

R2(config)# ipv6 router ospf 1
R2(config-rtr)# passive-interface default

b. Issue the show ipv6 ospf neighbor command on R1. After the dead timer expires, R2 is no longer listed as an OSPF neighbor.

R1# show ipv6 ospf neighbor  
  
            OSPFv3 Router with ID (1.1.1.1) (Process ID 1)  
  
Neighbor ID     Pri   State           Dead Time   Interface ID    Interface  
3.3.3.3           0   FULL/  -        00:00:37    6               Serial0/0/1

c. On R2, issue the show ipv6 ospf interface s0/0/0 command to view the OSPF status of interface S0/0/0.

R2# show ipv6 ospf interface s0/0/0  
Serial0/0/0 is up, line protocol is up   
  Link Local Address FE80::2, Interface ID 6  
  Area 0, Process ID 1, Instance ID 0, 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  
    No Hellos (Passive interface)  
  Graceful restart helper support enabled  
  Index 1/2/2, flood queue length 0  
  Next 0x0(0)/0x0(0)/0x0(0)  
  Last flood scan length is 2, maximum is 3  
  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)

d. If all OSPFv3 interfaces on R2 are passive, then no routing information is being advertised. If this is the case, then R1 and R3 should no longer have a route to the 2001:DB8:ACAD:B::/64 network. You can verify this by using the show ipv6 route command.

e. Change S0/0/1 on R2 by issuing the no passive-interface command, so that it sends and receives OSPFv3 routing updates. After entering this command, an informational message displays stating that a neighbor adjacency has been established with R3.

R2(config)# ipv6 router ospf 1
R2(config-rtr)# no passive-interface s0/0/1
*Apr 8 19:21:57.939: %OSPFv3-5-ADJCHG: Process 1, Nbr 3.3.3.3 on Serial0/0/1
from LOADING to FULL, Loading Done

f. Re-issue the show ipv6 route and show ipv6 ospf neighbor commands on R1 and R3, and look for a route to the 2001:DB8:ACAD:B::/64 network.

O   2001:DB8:ACAD:B::/64 [110/129]
     via FE80::3, Serial0/0/1

What interface is R1 using to route to the 2001:DB8:ACAD:B::/64 network? _______S0/0/1

What is the accumulated cost metric for the 2001:DB8:ACAD:B::/64 network on R1? _____129

Does R2 show up as an OSPFv3 neighbor on R1? _______No

Does R2 show up as an OSPFv3 neighbor on R3? _______Yes

What does this information tell you?
__________________________________________________
Answers will vary, but all traffic to the 2001:DB8:ACAD:B::/64 network from R1 will be routed through R3. The S0/0/0 interface on R2 is still configured as a passive interface, so OSPFv3 routing information is not being advertised across this interface. The 129 accumulated cost results from the fact that traffic from R3 to the 192.168.2.0/24 network must pass through two T1 (1.544 Mb/s) serial links (at a cost of 64 each) plus the R2 Gigabit 0/0 LAN link (at a cost of 1).

g. On R2, issue the no passive-interface S0/0/0 command to allow OSPFv3 routing updates to be advertised on that interface.

h. Verify that R1 and R2 are now OSPFv3 neighbors.

Reflection

1. If the OSPFv6 configuration for R1 had a process ID of 1, and the OSPFv3 configuration for R2 had a process ID of 2, can routing information be exchanged between the two routers? Why?
______________________________________________________
Yes. The OSPFv3 process ID is only used locally on the router, it does not need to match the process ID used on the other routers in the OSPFv3 area.

2. What may have been the reasoning for removing the network command in OSPFv3?
______________________________________________________
Answers will vary, but removing the network statement helps prevent IPv6 address typo errors. Also, an IPv6 interface can have multiple IPv6 addresses assigned to it. By assigning an Interface to an OSPFv3 Area, all the multicast networks on that interface will automatically be assigned to the OSPFv6 area and have a route created in the IPv6 routing table.

Router Interface Summary Table

Device Configs – Final

Router R1

R1#sh run
Building configuration...

Current configuration : 1673 bytes
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2
!
no aaa new-model
memory-size iomem 15
!
ip cef
!
no ip domain lookup
ipv6 unicast-routing
ipv6 cef
multilink bundle-name authenticated
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
ipv6 address FE80::1 link-local
ipv6 address 2001:DB8:ACAD:A::1/64
ipv6 ospf 1 area 0
!
interface GigabitEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
no ip address
ipv6 address FE80::1 link-local
ipv6 address 2001:DB8:ACAD:12::1/64
ipv6 ospf 1 area 0
clock rate 2000000
!
interface Serial0/0/1
no ip address
ipv6 address FE80::1 link-local
ipv6 address 2001:DB8:ACAD:13::1/64
ipv6 ospf 1 area 0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
!
ipv6 router ospf 1
router-id 1.1.1.1
passive-interface GigabitEthernet0/0
!
control-plane
!
banner motd ^C
Unauthorized Access is Prohibited!
^C
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
password 7 030752180500
login
transport input all
!
scheduler allocate 20000 1000
!
end

Router R2

R2#sh run
Building configuration...

Current configuration : 1736 bytes
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2
!
no aaa new-model
memory-size iomem 15
!
ip cef
!
no ip domain lookup
ipv6 unicast-routing
ipv6 cef
multilink bundle-name authenticated
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
ipv6 address FE80::2 link-local
ipv6 address 2001:DB8:ACAD:B::2/64
ipv6 ospf 1 area 0
!
interface GigabitEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
no ip address
ipv6 address FE80::2 link-local
ipv6 address 2001:DB8:ACAD:12::2/64
ipv6 ospf 1 area 0
!
interface Serial0/0/1
no ip address
ipv6 address FE80::2 link-local
ipv6 address 2001:DB8:ACAD:23::2/64
ipv6 ospf 1 area 0
clock rate 2000000
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ipv6 router ospf 1
router-id 2.2.2.2
passive-interface default
no passive-interface Serial0/0/0
no passive-interface Serial0/0/1
!
control-plane
!
banner motd ^C
Unauthorized Access is Prohibited!
^C
!
line con 0
logging synchronous
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
password 7 045802150C2E
login
transport input all
!
scheduler allocate 20000 1000
!
end

Router R3

R3#sh run
Building configuration...

Current configuration : 1680 bytes
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2
!
no aaa new-model
memory-size iomem 15
!
ip cef
!
no ip domain lookup
ipv6 unicast-routing
ipv6 cef
multilink bundle-name authenticated
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
ipv6 address FE80::3 link-local
ipv6 address 2001:DB8:ACAD:C::3/64
ipv6 ospf 1 area 0
!
interface GigabitEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
no ip address
ipv6 address FE80::3 link-local
ipv6 address 2001:DB8:ACAD:13::3/64
ipv6 ospf 1 area 0
clock rate 2000000
!
interface Serial0/0/1
no ip address
ipv6 address FE80::3 link-local
ipv6 address 2001:DB8:ACAD:23::3/64
ipv6 ospf 1 area 0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ipv6 router ospf 1
router-id 3.3.3.3
!
control-plane
!
banner motd ^C
Unauthorized Access is Prohibited!
^C
!
line con 0
logging synchronous
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
password 7 1511021F0725
login
transport input all
!
scheduler allocate 20000 1000
!
end