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Configuring IPv4 and IPv6 on Cisco Devices

CCNA: 0 to Hero - Comprehensive Network Engineering Bootcamp

Lesson 20: Configuring IPv4 and IPv6

IPv4 Configuration

To assign an IPv4 address to a router interface, you must enter interface configuration mode and use the ip address command, including the subnet mask.

ios Router# configure terminal Router(config)# interface GigabitEthernet 0/0 Router(config-if)# ip address 192.168.1.1 255.255.255.0 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# hostname R1

IPv6 Configuration

IPv6 requires enabling the feature globally before configuring interfaces.

  1. Enable IPv6 Routing (Globally): ios Router(config)# ipv6 unicast-routing

  2. Configure Interface Address: ios Router(config)# interface GigabitEthernet 0/1 Router(config-if)# ipv6 address 2001:DB8:ACAD::1/64 Router(config-if)# ipv6 address FE80::1 link-local Router(config-if)# no shutdown

Verification Commands

  • show ip interface brief: Quick summary of IPv4 interface status.
  • show ipv6 interface brief: Quick summary of IPv6 interface status.
  • show interface [interface_id]: Detailed interface statistics.