Cisco Systems ISR4451XK9 Default Gigabit Ethernet Configuration, Gigabit Ethernet Port Numbering

Chapter 4 Initial Configuration

Performing the Initial Configuration on the Router

The purpose of this interface is to allow users to perform management tasks on the router; it is an interface that should not and often cannot forward network traffic but can be used to access the router via Telnet and SSH to perform management tasks on the router. The interface is most useful before a router has begun routing, or in troubleshooting scenarios when other forwarding interfaces are inactive.

The following aspects of the management ethernet interface should be noted:

•The router has one management ethernet interface named GigabitEthernet0.

•IPv4, IPv6, and ARP are the only routed protocols supported for the interface.

•The interface provides a way to access to the router even if forwarding interfaces are not functional, or the IOS process is down.

•The management ethernet interface is part of its own VRF. See the “Management Ethernet Interface VRF” section in the Software Configuration Guide for the Cisco 4451-X Integrated Services Routers for more details.

Default Gigabit Ethernet Configuration

By default, a forwarding VRF is configured for the interface with a special group named “Mgmt-intf.” This cannot be changed. This isolates the traffic on the management interface away from the forwarding plane. Otherwise, the interface can be configured like other Gigabit Ethernet interfaces for most functions.

For example, the default configuration is as follows:

interface GigabitEthernet0 vrf forwarding Mgmt-intf

ip address 172.18.77.212 255.255.255.240

negotiation auto

Gigabit Ethernet Port Numbering

The Gigabit Ethernet Management port is always GigabitEthernet0.

The port can be accessed in configuration mode.

Router# config t

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#interface gigabitethernet0

Router(config-if)#

Configuring Gigabit Ethernet Interfaces

This sections shows how to assign an IP address and interface description to an Ethernet interface on your router.

For comprehensive configuration information on Gigabit Ethernet interfaces, see the “Configuring LAN Interfaces” chapter of the Cisco IOS Interface and Hardware Component Configuration Guide, http://www.cisco.com/en/US/docs/ios/12_2/interface/configuration/guide/icflanin.html

For information on interface numbering, see the software configuration guide for your router.

SUMMARY STEPS

1.enable

2.show ip interface brief

3.configure terminal

	Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
OL-27644-01		4-10