Implementation of IPv6 in Cisco routers (1)

To address the shortage of IP addresses and achieve higher network security, IPV6 has been launched for some time. In addition to some special industries, IPV6 applications in Lan are not widely used. Recently, I have deployed an IPV6 network for a local company. Next I will reproduce this process in the cisco simulator, hoping to help you.

I. Basic description

1. Network Topology

Implement communication between IPV6 hosts in two CIDR blocks. The routers in CIDR Block 1 are R1 and the routers in CIDR Block 2 are R2. They are connected through S 1/0. Configure an IPV4 IP address for S 1/0 of the two routers, 10.1.1.1 and 10.1.1.2 respectively. Then, two CIDR blocks are simulated through Loop on the vro. Both CIDR blocks are IPV6 CIDR blocks. Through Tunnel, IPV6 data packets are encapsulated into IPV4 data packets for point-to-point data transmission. The network topology is shown in Figure 1. (Figure 1)

2. IPV6 address

IPV6, unlike IPV4, has a 128-bit address length and is divided into eight 16-bit fields separated by colons. Similar to 3ffe: 1914: 0000: 0000: 0000: 2500: 04db: 3a3b is a standard IPV6 IP address. We can simplify it to 3ffe: 1914: according to certain rules :: 2500: 4db: 3a3b.