Dual-Stack (IPv4 & IPv6) on Routers

This lab focuses on configuring and verifying Dual-Stack (IPv4 & IPv6) on Routers, allowing IPv4 and IPv6 to operate simultaneously. The network consists of two routers (R1 and R2) and two clients (PC1, PC2), with each device having both an IPv4 and IPv6 address. The key challenges in this scenario include:

• Assigning IPv4 and IPv6 addresses on routers and hosts.
• Configuring static routing for both IPv4 and IPv6.
• Testing connectivity using both protocols.

Objective

By completing this lab, you will:

• Understand how Dual-Stack enables IPv4 and IPv6 to coexist.
• Configure and verify Dual-Stack addressing on routers.
• Compare IPv4 and IPv6 routing in a dual-stack environment.
• Test and troubleshoot dual-stack communication.

Network Structure

• Devices:
  • Router (R1)
  • Router (R2)
  • PC (PC1)
  • PC (PC2)
• IPv4 Addressing Scheme:
  • R1 E0/0: 192.168.1.1/24
  • R2 E0/0: 192.168.2.1/24
  • R1 E0/1: 10.1.1.1/30
  • R2 E0/1: 10.1.1.2/30
  • PC1: 192.168.1.10/24
  • PC2: 192.168.2.10/24
• IPv6 Addressing Scheme:
  • R1 E0/0: 2001:DB8:1111:1::1/64
  • R2 E0/0: 2001:DB8:1111:2::1/64
  • R2 E0/1: 2001:DB8:1111:3::2/64
  • R1 E0/1: 2001:DB8:1111:3::1/64
  • PC1: 2001:DB8:1111:1::10/64
  • PC2: 2001:DB8:1111:2::10/64
• Protocols:
  • IPv4 and IPv6 Dual-Stack
  • Static Routing

Topology Diagram

Prerequisites

1. EVE-NG installed and operational.
2. Two IOL-L3 routers (R1, R2) and two vPCS nodes (PC1, PC2).
3. Understanding of IPv4 and IPv6 addressing and subnetting.
4. Familiarity with Cisco CLI and static routing.
5. Knowledge of troubleshooting IPv4 and IPv6 connectivity.

Implementation Steps

Step 1: Set Up the Topology

1. Add two IOL-L3 routers (R1, R2) and two vPCS nodes (PC1, PC2) to the EVE-NG topology.
2. Connect PC1 to R1 and PC2 to R2.
3. Connect R1 to R2 via an Ethernet link.

Step 2: Configure Dual-Stack on R1

Assign IPv4 and IPv6 addresses on R1 interfaces.

Router>enable
Router#configure terminal
Router(config)#hostname R1

R1(config)#interface ethernet0/0
R1(config-if)#ip address 192.168.1.1 255.255.255.0
R1(config-if)#ipv6 address 2001:DB8:1111:1::1/64
R1(config-if)#no shutdown
R1(config-if)#exit

R1(config)#interface ethernet0/1
R1(config-if)#ip address 10.1.1.1 255.255.255.252
R1(config-if)#ipv6 address 2001:DB8:1111:3::1/64
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config)#

Why this step? Dual-Stack allows routers to communicate over both IPv4 and IPv6.

Step 3: Configure Dual-Stack on R2

Assign IPv4 and IPv6 addresses on R2 interfaces.

Router>enable
Router#configure terminal
Router(config)#hostname R2

R2(config)#interface ethernet0/0
R2(config-if)#ip address 192.168.2.1 255.255.255.0
R2(config-if)#ipv6 address 2001:DB8:1111:2::1/64
R2(config-if)#no shutdown
R2(config-if)#exit

R2(config)#interface ethernet0/1
R2(config-if)#ip address 10.1.1.2 255.255.255.252
R2(config-if)#ipv6 address 2001:DB8:1111:3::2/64
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#

Why this step? This ensures that R2 can communicate using both IPv4 and IPv6, making it compatible with the dual-stack environment.

Step 4: Enable IPv6 Routing on R1 and R2

R1(config)#ipv6 unicast-routing
R1(config)#exit

R2(config)#ipv6 unicast-routing
R2(config)#exit