You will configure the two routers, R1 and R2, with IPv6 so that they can communicate. The routers are missing all the configuration necessary to support IPv6. To establish IPv6 on Cisco routers, there are two basic steps. First, you must configure the routers for IPv6 forwarding. Next, you should configure the interfaces with specified IPv6 addresses. This lab tests your ability to configure support for IPv6 and verify the configuration. The IPv6 addresses are provided in Table 1. You will not use the PCs in this lab.

Question

1. Enter the privileged mode on Router R1 and enter the command to enable IPv6 routing. List the steps required to enable IPv6 routing.

2. Enter privileged mode on Router R2 and enter the command to enable IPv6 routing. List the steps required to enable IPv6 routing.

3. In the next step, you now need to add IPv6 addresses to the WAN interfaces. Add the IPv6 address 2001:C16C:0000:0001:0000:0000:0000:0001/64 to the serial 0/0/0 interface of R1. What command is required to add this address? Add the address and enable the interface.

4. Next add the IPv6 address to the serial interface of R2. You are to use the abbreviated version of IPv6 address 2001:C16C:0000:0001:0000:0000:0000:0002/64, add the address to the serial 0/0/1 interface of R2, and enable the interface. List the command sequence used.

5. Use the command on R1 to observe the address added to the serial 0/0/0 interface. What command is used? What addresses are shown?

6. Issue the show running-config command on R1 and examine the command you a

Answer 1

1.
```
R1(config)# ipv6 unicast-routing
```

2.
```
R2(config)# ipv6 unicast-routing
```

3.
```
R1(config)# interface serial 0/0/0
R1(config-if)# ipv6 address 2001:C16C:0000:0001:0000:0000:0000:0001/64
R1(config-if)# clock rate 1536000
R1(config-if)# no shutdown
%LINK-3-UPDOWN: Interface Serial0/0/0, changed state to down
R1(config-if)#
```

4.
```
R2(config)# int s0/0/1
R2(config-if)# ipv6 address 2001:C16C:0:1::2/64
R2(config-if)# no shutdown
%LINK-3-UPDOWN: Interface Serial0/0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/1, changed state to
up
R2(config-if)#
```

5.
```
R1# sh ipv6 interface
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::213:19FF:FE7B:1101/64
No Virtual link-local address(es):
Global unicast address(es):
2001:C16C:0:1::1, subnet is 2001:C16C:0:1::/64
Joined group address(es):
FF02::1
FF02::2
FF02::0001:FF00:0001
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
Hosts use stateless autoconfig for addresses.
```

6.
```
ipv6 address 2001:C16C:0:1::1/64.
IPv6 addresses can be abbreviated by dropping leading zeros and substituting :: for successive
fields of zeros. Cisco IOS will always reduce IPv6 addresses to the shortest format
possible.
```

7.
```
R1# SH ipv6 interface brief
FastEthernet0/0 [administratively down/down]
unassigned
FastEthernet0/1 [administratively down/down]
unassigned
Serial0/0/0 [up/up]
FE80::0213:19FF:FE7B:1101
2001:C16C:0:1::1
Serial0/0/1 [administratively down/down]
unassigned
```

8.
```
You should see these routes:
Connected: 2001:C16C:0:1::/64, S0/0/1
Local: 2001:C16C:0:1::2/128, S0/0/1
R1# sh ipv6 route
IPv6 Routing Table - 4 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
L 2001:C16C:0:1::1/128 [0/0]
via ::, Serial0/0/0
C 2001:C16C:0:1::/64 [0/0]
via ::, Serial0/0/0
L FE80::/10 [0/0]
via ::, Null0
L FF00::/8 [0/0]
via ::, Null0
```

9.
```
R2# ping ipv6 2001:C16C:0:1::1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:C16C:0:1::1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms
```

10.
```
R2(config)# ipv6 host R1-WAN 2001:C16C:0:1::1

R2# ping R1-LAN
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:C16C:0:1::1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms
R2#
```

11.
```
2001:C16C:0:2::/64
```

12.
```
R1(config)# int fa0/0
R1(config-if)# ipv6 address 2001:C16C:0000:0002::/64 eui-64
R1(config-if)# no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state
to up
```

13.
```
R2(config)# int fa0/0
R2(config-if)# ipv6 address 2001:C16C:0:3::/64 eui-64
R2(config-if)# no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state
to up
```

14.
```
R2# sh ipv6 interface brief
FastEthernet0/0 [up/up]
FE80::0213:19FF:FE7B:2201
2001:C16C:0:3
FastEthernet0/1 [administratively down/down]
unassigned
Serial0/0/0 [administratively down/down]
unassigned
Serial0/0/1 [up/up]
FE80::0213:19FF:FE7B:2201
2001:C16C:0:1::1
```

15.
```
R2# sh ipv6 route
IPv6 Routing Table - 6 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
L 2001:C16C:0:3:213:19FF:FE7B:2201/128 [0/0]
via ::, FastEthernet0/0
C 2001:C16C:0:3::/64 [0/0]
via ::, FastEthernet0/0
L 2001:C16C:0:1::2/128 [0/0]
via ::, Serial0/0/1
C 2001:C16C:0:1::/64 [0/0]
via ::, Serial0/0/1
L FE80::/10 [0/0]
via ::, Null0
L FF00::/8 [0/0]
via ::, Null0
R2#
```