1.1.3.5 Packet Tracer - Configuring IPv4 and IPv6 Interfaces Instructions Answers

! ==============================================================
!--- 1.1.3.5 Packet Tracer - Configuring IPv4 and IPv6 Interfaces
!--- ANSWER SCRIPT FOR ROUTER R1
!--- Usage: log in to R1 (user EXEC password: cisco), type "enable" and enter the privileged EXEC password "class", then copy this whole file and paste it at the R1# prompt. Every line beginning with "!" is a comment; IOS ignores it, so pasting a comment by accident is harmless.
! ==============================================================

enable
configure terminal

! --------------------------------------------------------------
!--- Part 1: Configure IPv4 addressing on the R1 LAN interfaces.
! --------------------------------------------------------------

!--- G0/0 - LAN gateway for PC1 (172.16.20.1/25).
interface gigabitethernet 0/0
 ip address 172.16.20.1 255.255.255.128
 no shutdown
 exit

!--- G0/1 - LAN gateway for PC2 (172.16.20.129/25).
interface gigabitethernet 0/1
 ip address 172.16.20.129 255.255.255.128
 no shutdown
 exit

end

! --------------------------------------------------------------
!--- Save the configuration to NVRAM. (Press Enter when prompted for the destination filename.)
! --------------------------------------------------------------
copy running-config startup-config


! ==============================================================
!--- Verification:
!---   show ip interface brief  -> G0/0 and G0/1 up/up with the correct IPv4 addresses
!---   show ip route            -> 172.16.20.0/25 and 172.16.20.128/25 appear as connected (C) routes
!---   (on PC1) ping 172.16.20.138  -> PC1 reaches PC2 across R1
!---   (on PC1) ping 64.100.1.10    -> PC1 reaches the Dual Stack Server over S0/0/0
!--- Note: S0/0/0 (209.165.200.225/30) and the route toward the Internet are
!--- preconfigured - do not change them. PC1/PC2 must also have their static
!--- IPv4 address, mask and default gateway set (see the Addressing Table),
!--- otherwise the pings fail even though R1 is correct.
! ==============================================================

! ==============================================================
!--- 1.1.3.5 Packet Tracer - Configuring IPv4 and IPv6 Interfaces
!--- ANSWER SCRIPT FOR ROUTER R2
!--- Usage: log in to R2 (user EXEC password: cisco), type "enable" and enter the privileged EXEC password "class", then copy this whole file and paste it at the R2# prompt. Every line beginning with "!" is a comment; IOS ignores it, so pasting a comment by accident is harmless.
! ==============================================================

enable
configure terminal

! --------------------------------------------------------------
!--- Part 2: Configure IPv6 addressing on the R2 LAN interfaces.
! --------------------------------------------------------------

!--- Enable IPv6 routing so R2 forwards IPv6 between its LANs and the serial link (harmless if already preconfigured).
ipv6 unicast-routing

!--- G0/0 - LAN gateway for PC3: global unicast 2001:DB8:C0DE:12::1/64, link-local FE80::2 (the PCs' default gateway).
interface gigabitethernet 0/0
 ipv6 address 2001:DB8:C0DE:12::1/64
 ipv6 address FE80::2 link-local
 no shutdown
 exit

!--- G0/1 - LAN gateway for PC4: global unicast 2001:DB8:C0DE:13::1/64, link-local FE80::2 (the PCs' default gateway).
interface gigabitethernet 0/1
 ipv6 address 2001:DB8:C0DE:13::1/64
 ipv6 address FE80::2 link-local
 no shutdown
 exit

end

! --------------------------------------------------------------
!--- Save the configuration to NVRAM. (Press Enter when prompted for the destination filename.)
! --------------------------------------------------------------
copy running-config startup-config


! ==============================================================
!--- Verification:
!---   show ipv6 interface brief  -> G0/0 and G0/1 up/up, each showing FE80::2 and its 2001:DB8:C0DE:1x::1 address
!---   show ipv6 route            -> 2001:DB8:C0DE:12::/64 and 2001:DB8:C0DE:13::/64 appear as connected (C) routes
!---   (on PC3) ping 2001:DB8:C0DE:13::A  -> PC3 reaches PC4 across R2
!---   (on PC3) ping 2001:DB8:100:1::A    -> PC3 reaches the Dual Stack Server over S0/0/1
!--- Note: PC3 and PC4 use FE80::2 as their default gateway. Without the
!--- "ipv6 address FE80::2 link-local" lines, R2 auto-generates an EUI-64
!--- link-local address (FE80::2xx:xxFF:FExx:xxxx), the gateway FE80::2 does not
!--- exist, and every ping off the local subnet fails. S0/0/1 is preconfigured.
! ==============================================================