Gigabit Ethernet Management Interface Overview; Default Gigabit Ethernet Configuration; Gigabit Ethernet Port Numbering - Cisco 4000 Series Hardware Installation Manual

Perform Initial Configuration on Cisco 4000 Series ISRs
line console
exec-timeout 2 30
The following example shows how to set the console idle privileged EXEC timeout to 30 seconds:
line console
exec-timeout 0 30

Gigabit Ethernet Management Interface Overview

The router provides an Ethernet management port named GigabitEthernet0.
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. It ca, however, be used to access the
router through Telnet and SSH to perform management tasks on the router. The interface is most useful
before a router begins routing, or in troubleshooting scenarios when other forwarding interfaces are
inactive.
Note he following aspects of the management ethernet interface:
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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. The basic configuration is like other interfaces; however, there are many forwarding features that
are not supported on these interfaces. No forwarding features can be configured on the GigabitEthernet0
interface as it is only used for management.
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.
Router(config)#interface gigabitethernet0
Router(config-if)#
Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers
4-10
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
VRF" section in the Software Configuration Guide for Cisco 4000 Series ISRs
Chapter 4 Configure Initial Router Settings on Cisco 4000 Series ISRs
"Management Ethernet Interface
End with CNTL/Z.
for more details.
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