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CCNA 2 Version 7

8.5.1 Lab – Configure DHCPv6 (Answers)

CCNA Exam AnswersBy No Comments19 Mins Read

Lab – Configure DHCPv6 (Instructor Version)

Topology

Addressing Table

Device Interface IPv6 Address
R1 G0/0/0 2001:db8:acad:2::1 /64
fe80::1
G0/0/1 2001:db8:acad:1::1/64
fe80::1
R2 G0/0/0 2001:db8:acad:2::2/64
fe80::2
G0/0/1 2001:db8:acad:3::1 /64
fe80::1
PC-A NIC DHCP
PC-B NIC DHCP

Objectives

  • Part 1: Build the Network and Configure Basic Device Settings
  • Part 2: Verify SLAAC address assignment from R1
  • Part 3: Configure and verify a Stateless DHCPv6 Server on R1
  • Part 4: Configure and verify a Stateful DHCPv6 Server on R1
  • Part 5: Configure and verify a DHCPv6 Relay on R2

Background / Scenario

The dynamic assignment of IPv6 global unicast addresses (GUA) can be configured the following three ways:

  • Stateless Address Auoconfiguration (SLACC)
  • Stateless Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
  • Stateful DHCPv6

When using SLACC to assign IPv6 addresses to hosts a DHCPv6 server is not used. Because a DHCPv6 server is not used when implementing SLACC, hosts are unable to receive additional critical network information, including a domain name server (DNS) address as well as a domain name.

When using Stateless DHCPv6 to assign IPv6 addresses to host, a DHCPv6 server is used to assign the additional critical network information, however the IPv6 address is assigned using SLACC.

When implementing Stateful DHCPv6, a DHCPv6 server assigns all network information, including the IPv6 address.

The determination of how hosts obtain they dynamic IPv6 addressing is dependent on flag setting contain within the router advertisement (RA) messages.

In this scenario, the company has grown in size, and the network administrators can no longer assign IP addresses to devices manually. Your job is to configure the R2 router to assign IPv6 addresses on two different subnets connected to router R1.

Note: The routers used with CCNA hands-on labs are Cisco 4221 with Cisco IOS XE Release 16.9.4 (universalk9 image). The switches used in the labs are Cisco Catalyst 2960s with Cisco IOS Release 15.2(2) (lanbasek9 image). Other routers, switches, and Cisco IOS versions can be used. Depending on the model and Cisco IOS version, the commands available and the output produced might vary from what is shown in the labs. Refer to the Router Interface Summary Table at the end of the lab for the correct interface identifiers.

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

Required Resources

  • 2 Routers (Cisco 4221 with Cisco IOS XE Release 16.9.4 universal image or comparable)
  • 2 Switches (Cisco 2960 with Cisco IOS Release 15.2(2) lanbasek9 image or comparable) – Optional
  • 2 PCs (Windows with a terminal emulation program, such as Tera Term)
  • Console cables to configure the Cisco IOS devices via the console ports
  • Ethernet cables as shown in the topology

Instructions

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 switches.

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

Attach the devices as shown in the topology diagram, and cable as necessary.

Step 2: Configure basic settings for each switch. (Optional)

a. Assign a device name to the switch.

switch(config)# hostname S1
switch(config)# hostname S2

b. Disable DNS lookup to prevent the router from attempting to translate incorrectly entered commands as though they were host names.

S1(config)# no ip domain-lookup
S2(config)# no ip domain-lookup

c. Assign class as the privileged EXEC encrypted password.

S1(config)# enable secret class
S2(config)# enable secret class

d. Assign cisco as the console password and enable login.

S1(config)# line console 0
S1(config-line)# password cisco
S1(config-line)# login

S2(config)# line console 0
S2(config-line)# password cisco
S2(config-line)# login

e. Assign cisco as the VTY password and enable login.

S1(config)# line vty 0 4
S1(config-line)# password cisco
S1(config-line)# login

S2(config)# line vty 0 4
S2(config-line)# password cisco
S2(config-line)# login

f. Encrypt the plaintext passwords.

S1(config)# service password-encryption

S2(config)# service password-encryption

g. Create a banner that warns anyone accessing the device that unauthorized access is prohibited.

S1(config)# banner motd $ Authorized Users Only! $

S2(config)# banner motd $ Authorized Users Only! $

h. Shutdown all unused ports

S1(config)# interface range f0/1-4, f0/7-24, g0/1-2
S1(config-if-range)# shutdown

S2(config)# interface range f0/1-4, f0/7-17, f0/19-24, g0/1-2
S2(config-if-range)# shutdown

i. Save the running configuration to the startup configuration file.

S1# copy running-config startup-config

S2# copy running-config startup-config
Step 3: Configure basic settings for each router.

a. Assign a device name to the router.

router(config)# hostname R1

router(config)# hostname R2

b. Disable DNS lookup to prevent the router from attempting to translate incorrectly entered commands as though they were host names.

R1(config)# no ip domain lookup

R2(config)# no ip domain lookup

c. Assign class as the privileged EXEC encrypted password.

R1(config)# enable secret class
R2(config)# enable secret class

d. Assign cisco as the console password and enable login.

R1(config)# line console 0
R1(config-line)# password cisco
R1(config-line)# login

R2(config)# line console 0
R2(config-line)# password cisco
R2(config-line)# login

e. Assign cisco as the VTY password and enable login.

R1(config)# line vty 0 4
R1(config-line)# password cisco
R1(config-line)# login

R2(config)# line vty 0 4
R2(config-line)# password cisco
R2(config-line)# login

f. Encrypt the plaintext passwords.

R1(config)# service password-encryption

R2(config)# service password-encryption

g. Create a banner that warns anyone accessing the device that unauthorized access is prohibited.

R1(config)# banner motd $ Authorized Users Only! $

R2(config)# banner motd $ Authorized Users Only! $

h. Enable IPv6 Routing

R1(config)# ipv6 unicast-routing

R2(config)# ipv6 unicast-routing

i. Save the running configuration to the startup configuration file.

R1(config)# exit
R1# copy running-config startup-config

R2(config)# exit
R2# copy running-config startup-config
Step 4: Configure interfaces and routing for both routers.

a. Configure the G0/0/0 and G0/0/1 interfaces on R1 and R2 with the IPv6 addresses specified in the table above.

R1(config)# interface g0/0/1
R1(config-if)# ipv6 address fe80::1 link-local
R1(config-if)# ipv6 address 2001:db8:acad:1::1/64
R1(config-if)# no shutdown
R1(config)# interface g0/0/0
R1(config-if)# ipv6 address fe80::1 link-local
R1(config-if)# ipv6 address 2001:db8:acad:2::1/64
R1(config-if)# no shutdown

R2(config)# interface g0/0/1
R2(config-if)# ipv6 address fe80::1 link-local
R2(config-if)# ipv6 address 2001:db8:acad:3::1/64
R2(config-if)# no shutdown
R1(config)# interface g0/0/0
R1(config-if)# ipv6 address fe80::2 link-local
R1(config-if)# ipv6 address 2001:db8:acad:2::2/64
R1(config-if)# no shutdown

b. Configure a default route on each router pointed to the IP address of G0/0/0 on the other router.

R1(config)# ipv6 route ::/0 2001:db8:acad:2::2
R2(config)# ipv6 route ::/0 2001:db8:acad:2::1

c. Verify routing is working by pinging R2’s G0/0/1 address from R1

R1#(config)# exit
R1# ping 2001:db8:acad:1::1

d. Save the running configuration to the startup configuration file.

R1# copy running-config startup-config

Part 2: Verify SLAAC Address Assignment from R1

In Part 2, you will verify that Host PC-A receives an IPv6 address using the SLAAC method.

Power PC-A up and ensure that the NIC is configured for IPv6 automatic configuration.

After a few moments, the results of the command ipconfig should show that PC-A has assigned itself an address from the 2001:db8:1::/64 network.

C:\Users\Student> ipconfig
Windows IP Configuration

Ethernet adapter Ethernet 2:

   Connection-specific DNS Suffix  . : 
   IPv6 Address. . . . . . . . . . . : 2001:db8:acad:1:5c43:ee7c:2959:da68
   Temporary IPv6 Address. . . . . . : 2001:db8:acad:1:3c64:e4f9:46e1:1f23
   Link-local IPv6 Address . . . . . : fe80::5c43:ee7c:2959:da68%6
   IPv4 Address. . . . . . . . . . . : 169.254.218.104
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : fe80::1%6

Where did the host-id portion of the address come from?

Answer will depend upon the operating system configuration. Either the host generates an EUI-64 address based on the interface MAC, or the host generates a random 64-bit address.

Part 3: Configure and Verify a DHCPv6 server on R1

In Part 3, you will configure and verify a stateless DHCP server on R1. The objective is to provide PC-A with DNS server and Domain information.

Step 1: Examine the configuration of PC-A in more detail.

a. Issue the command ipconfig /all on PC-A and take a look at the output.

C:\Users\Student> ipconfig /all
Windows IP Configuration

   Host Name . . . . . . . . . . . . : DESKTOP-3FR7RKA
   Primary Dns Suffix  . . . . . . . : 
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Ethernet0:

   Connection-specific DNS Suffix  . : 
   Description . . . . . . . . . . . : Intel(R) 852574L Gigabit Network Connection
   Physical Address. . . . . . . . . : 00-50-56-83-63-6D
   IPv6 Address. . . . . . . . . . . : 2001:db8:acad:1:5c43:ee7c:2959:da68(Preferred)
   Temporary IPv6 Address. . . . . . : 2001:db8:acad:1:3c64:e4f9:46e1:1f23(Preferred)
   Link-local IPv6 Address . . . . . : fe80::5c43:ee7c:2959:da68%6(Preferred)
   IPv4 Address. . . . . . . . . . . : 169.254.218.104(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : fe80::1%6
   DHCPv6 IAID . . . . . . . . . . . : 50334761
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-24-F5-CE-A2-00-50-56-B3-63-6D
   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   NetBIOS over Tcpip. . . . . . . . : Enabled

b. Notice that there is no Primary DNS suffix. Also note that the DNS server addresses provided are “site local anycast” addresses, and not unicast addresses, as would be expected.

Step 2: Configure R1 to provide stateless DHCPv6 for PC-A.

a. Create an IPv6 DHCP pool on R1 named R1-STATELESS. As a part of that pool, assign the DNS server address as 2001:db8:acad::1 and the domain name as stateless.com.

R1(config)# ipv6 dhcp pool R1-STATELESS
R1(config-dhcp)# dns-server 2001:db8:acad::254
R1(config-dhcp)# domain-name STATELESS.com

b. Configure the G0/0/1 interface on R1 to provide the OTHER config flag to the R1 LAN, and specify the DHCP pool you just created as the DHCP resource for this interface.

R1(config)# interface g0/0/1
R1(config-if)# ipv6 nd other-config-flag
R1(config-if)# ipv6 dhcp server R1-STATELESS

c. Save the running configuration to the startup configuration file.

R1# copy running-config startup-config

d. Restart PC-A.

e. Examine the output of ipconfig /all and notice the changes.

C:\Users\Student> ipconfig /all
Windows IP Configuration

   Host Name . . . . . . . . . . . . : DESKTOP-3FR7RKA
   Primary Dns Suffix  . . . . . . . : 
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : STATELESS.com

Ethernet adapter Ethernet0:

   Connection-specific DNS Suffix  . : STATELESS.com
   Description . . . . . . . . . . . : Intel(R) 82574L Gigabit Network Connection
   Physical Address. . . . . . . . . : 00-50-56-83-63-6D
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:db8:acad:1:5c43:ee7c:2959:da68(Preferred)
   Temporary IPv6 Address. . . . . . : 2001:db8:acad:1:3c64:e4f9:46e1:1f23(Preferred)
   Link-local IPv6 Address . . . . . : fe80::5c43:ee7c:2959:da68%6(Preferred)
   IPv4 Address. . . . . . . . . . . : 169.254.218.104(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : fe80::1%6
   DHCPv6 IAID . . . . . . . . . . . : 50334761
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-24-F5-CE-A2-00-50-56-B3-63-6D
   DNS Servers . . . . . . . . . . . : 2001:db8:acad::254
   NetBIOS over Tcpip. . . . . . . . : Enabled
   Connection-specific DNS Suffix Search List :
                                       STATELESS.com

f. Test connectivity by pinging R2’s G0/0/1 interface IP address.

Part 4: Configure a stateful DHCPv6 server on R1

In Part 4, you will configure R1 to respond to DHCPv6 requests from the LAN on R2.

a. Create a DHCPv6 pool on R1 for the 2001:db8:acad:3:aaaa::/80 network. This will provide addresses to the LAN connected to interface G0/0/1 on R2. As a part of the pool, set the DNS server to 2001:db8:acad::254, and set the domain name to STATEFUL.com.

R1(config)# ipv6 dhcp pool R2-STATEFUL
R1(config-dhcp)# address prefix 2001:db8:acad:3:aaa::/80
R1(config-dhcp)# dns-server 2001:db8:acad::254
R1(config-dhcp)# domain-name STATEFUL.com

b. Assign the DHCPv6 pool you just created to interface g0/0/0 on R1.

R1(config)# interface g0/0/0
R1(config-if)# ipv6 dhcp server R2-STATEFUL

Part 5: Configure and verify DHCPv6 relay on R2.

In Part 5, you will configure and verify DHCPv6 relay on R2, allowing PC-B to receive an IPv6 Address.

Step 1: Power on PC-B and examine the SLAAC address that it generates.
C:\Users\Student> ipconfig /all
Windows IP Configuration

   Host Name . . . . . . . . . . . . : DESKTOP-3FR7RKA
   Primary Dns Suffix  . . . . . . . : 
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Ethernet0:

   Connection-specific DNS Suffix  . : 
   Description . . . . . . . . . . . : Intel(R) 82574L Gigabit Network Connection
   Physical Address. . . . . . . . . : 00-50-56-B3-7B-06
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:db8:acad:3:a0f3:3d39:f9fb:a020(Preferred)
   Temporary IPv6 Address. . . . . . : 2001:db8:acad:3:d4f3:7b16:eeee:b2b5(Preferred)
   Link-local IPv6 Address . . . . . : fe80::a0f3:3d39:f9fb:a020%6(Preferred)
   IPv4 Address. . . . . . . . . . . : 169.254.160.32(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : fe80::1%6
   DHCPv6 IAID . . . . . . . . . . . : 50334761
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-24-F2-08-38-00-50-56-B3-7B-06
   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Notice in the output that the prefix used is 2001:db8:acad:3::

Step 2: Configure R2 as a DHCP relay agent for the LAN on G0/0/1.

a. Configure the ipv6 dhcp relay command on R2 interface G0/0/1, specifying the destination address of the G0/0/0 interface on R1. Also configure the managed-config-flag command.

R2(config)# interface g0/0/1
R2(config-if)# ipv6 nd managed-config-flag
R2(config-if)# ipv6 dhcp relay destination 2001:db8:acad:2::1 g0/0/0

b. Save your configuration.

R2# copy running-configuration startup-configuration
Step 3: Attempt to acquire an IPv6 address from DHCPv6 on PC-B.

a. Restart PC-B.

b. Open a command prompt on PC-B and issue the command ipconfig /all and examine the output to see the results of the DHCPv6 relay operation.

C:\Users\Student> ipconfig /all
Windows IP Configuration

   Host Name . . . . . . . . . . . . : DESKTOP-3FR7RKA
   Primary Dns Suffix  . . . . . . . : 
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : STATEFUL.com

Ethernet adapter Ethernet0:

   Connection-specific DNS Suffix  . : STATEFUL.com
   Description . . . . . . . . . . . : Intel(R) 852574L Gigabit Network Connection
   Physical Address. . . . . . . . . : 00-50-56-B3-7B-06
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:db8:acad3:aaaa:7104:8b7d:5402(Preferred)
   Lease Obtained. . . . . . . . . . : Sunday, October 6, 2019 3:27:13 PM
   Lease Expires . . . . . . . . . . : Tuesday, October 8, 2019 3:27:13 PM
   Link-local IPv6 Address . . . . . : fe80::a0f3:3d39:f9fb:a020%6(Preferred)
   IPv4 Address. . . . . . . . . . . : 169.254.160.32(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : fe80::2%6
   DHCPv6 IAID . . . . . . . . . . . : 50334761
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-24-F2-08-38-00-50-56-B3-7B-06
   DNS Servers . . . . . . . . . . . : 2001:db8:acad::254
   NetBIOS over Tcpip. . . . . . . . : Enabled
   Connection-specific DNS Suffix Search List  :
                                       STATEFUL.com

c. Test connectivity by pinging R1’s G0/0/1 interface IP address.

Device Configs – Final

Switch S1

S1# show run
Building configuration...

Current configuration : 1706 bytes
!
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname S1
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$73g3$Jo3CGq7B8MLGHbPVaa7mW1
!
no aaa new-model
system mtu routing 1500
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
interface FastEthernet0/1
 shutdown
!
interface FastEthernet0/2
 shutdown
!
interface FastEthernet0/3
 shutdown
!
interface FastEthernet0/4
 shutdown
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
 shutdown
!
interface FastEthernet0/8
 shutdown
!
interface FastEthernet0/9
 shutdown
!
interface FastEthernet0/10
 shutdown
!
interface FastEthernet0/11
 shutdown
!
interface FastEthernet0/12
 shutdown
!
interface FastEthernet0/13
 shutdown
!
interface FastEthernet0/14
 shutdown
!
interface FastEthernet0/15
 shutdown
!
interface FastEthernet0/16
 shutdown
!
interface FastEthernet0/17
 shutdown
!
interface FastEthernet0/18
 shutdown
!
interface FastEthernet0/19
 shutdown
!
interface FastEthernet0/20
 shutdown
!
interface FastEthernet0/21
 shutdown
!
interface FastEthernet0/22
 shutdown
!
interface FastEthernet0/23
 shutdown
!
interface FastEthernet0/24
 shutdown
!
interface GigabitEthernet0/1
 shutdown
!
interface GigabitEthernet0/2
 shutdown
!
interface Vlan1
 no ip address
!
ip http server
ip http secure-server
!
banner motd ^C Authorized Users Only! ^C
!
line con 0
 password 7 13061E010803
 login
line vty 0 4
 password 7 13061E010803
 login
line vty 5 15
 login
!
end

Switch S2

S2# show run
Building configuration...

Current configuration : 1706 bytes
!
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname S2
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$fREN$AwrLs.iAyQlhBS7EhVz5J.
!
no aaa new-model
system mtu routing 1500
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
interface FastEthernet0/1
 shutdown
!
interface FastEthernet0/2
 shutdown
!
interface FastEthernet0/3
 shutdown
!
interface FastEthernet0/4
 shutdown
!
interface FastEthernet0/5
!
interface FastEthernet0/6
 shutdown
!
interface FastEthernet0/7
 shutdown
!
interface FastEthernet0/8
 shutdown
!
interface FastEthernet0/9
 shutdown
!
interface FastEthernet0/10
 shutdown
!
interface FastEthernet0/11
 shutdown
!
interface FastEthernet0/12
 shutdown
!
interface FastEthernet0/13
 shutdown
!
interface FastEthernet0/14
 shutdown
!
interface FastEthernet0/15
 shutdown
!
interface FastEthernet0/16
 shutdown
!
interface FastEthernet0/17
 shutdown
!
interface FastEthernet0/18
!
interface FastEthernet0/19
 shutdown
!
interface FastEthernet0/20
 shutdown
!
interface FastEthernet0/21
 shutdown
!
interface FastEthernet0/22
 shutdown
!
interface FastEthernet0/23
 shutdown
!
interface FastEthernet0/24
 shutdown
!
interface GigabitEthernet0/1
 shutdown
!
interface GigabitEthernet0/2
 shutdown
!
interface Vlan1
 no ip address
!
ip http server
ip http secure-server
!
banner motd ^C Authorized Users Only! ^C
!
line con 0
 password 7 121A0C041104
 login
line vty 0 4
 password 7 121A0C041104
 login
line vty 5 15
 login
!
end

Router R1

R1# show run
Building configuration...


Current configuration : 3959 bytes
!
version 16.9
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
platform qfp utilization monitor load 80
no platform punt-keepalive disable-kernel-core
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
enable secret 5 $1$I56A$PEdL3aayz4ui1KNVACjUE1
!
no aaa new-model
!
!
no ip domain lookup
!
!
login on-success log
!
!
subscriber templating
!
!
ipv6 unicast-routing
ipv6 dhcp pool R1-STATELESS
 dns-server 2001:DB8:ACAD::254
 domain-name STATELESS.com
!
ipv6 dhcp pool R2-STATEFUL
 address prefix 2001:DB8:ACAD:3:AAAA::/80
 dns-server 2001:DB8:ACAD::254
 domain-name STATEFUL.com
!
multilink bundle-name authenticated
!
spanning-tree extend system-id
!
!
redundancy
 mode none
!
!
interface GigabitEthernet0/0/0
 no ip address
 ipv6 address FE80::1 link-local
 ipv6 address 2001:DB8:ACAD:2::1/64
 ipv6 dhcp server R2-STATEFUL
negotiation auto
!
interface GigabitEthernet0/0/1
 no ip address
 negotiation auto
 ipv6 address FE80::1 link-local
 ipv6 address 2001:DB8:ACAD:1::1/64
 ipv6 nd other-config-flag
 ipv6 dhcp server R1-STATELESS
!
interface Serial0/1/0
 no ip address
 shutdown
!
interface Serial0/1/1
 no ip address
 shutdown
! 
ip forward-protocol nd
no ip http server
ip http secure-server
!
!
ipv6 route ::/0 2001:DB8:ACAD:2::2
!
!
control-plane
!
banner motd ^C Authorized Users Only! ^C
!
line con 0
 password 7 030752180500
 login
 transport input none
 stopbits 1
line aux 0
 stopbits 1
line vty 0 4
 password 7 045802150C2E
 login
!
end

Router R2

R2# show run
Building configuration...


Current configuration : 1639 bytes
!
version 16.9
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
platform qfp utilization monitor load 80
no platform punt-keepalive disable-kernel-core
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
enable secret 5 $1$Q7m2$XP0D4vB3fJxSm3X3V53uq1
!
no aaa new-model
!
no ip domain lookup
!
login on-success log
!
!
subscriber templating
!
!
ipv6 unicast-routing
multilink bundle-name authenticated
!
spanning-tree extend system-id
!
!
redundancy
 mode none
!
!
interface GigabitEthernet0/0/0
 no ip address
 ipv6 address FE80::2 link-local
 ipv6 address 2001:DB8:ACAD:2::2/64
!
interface GigabitEthernet0/0/1
 no ip address
 negotiation auto
 ipv6 address FE80::2 link-local
 ipv6 address 2001:DB8:ACAD:3::1/64
 ipv6 nd prefix 2001:DB8:ACAD:3::/64 2592000 604800 no-autoconfig
 ipv6 nd managed-config-flag
 ipv6 dhcp relay destination 2001:DB8:ACAD:2::1 GigabitEthernet0/0/0
!
interface Serial0/1/0
 no ip address
!
interface Serial0/1/1
 no ip address
!
ip forward-protocol nd
no ip http server
ip http secure-server
!
!
ipv6 route ::/0 2001:DB8:ACAD:2::1
!
!
control-plane
!
banner motd ^C Authorized Users Only! ^C
!
line con 0
 password 7 045802150C2E
 login
 transport input none
 stopbits 1
line aux 0
 stopbits 1
line vty 0 4
 password 7 00071A150754
 login
!
!
end

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