Specifying A Default Route Or Gateway Of Last Resort; Ip Routing - Cisco 1941W Configuration Manual

Using the Cisco IOS CLI to Perform Initial Configuration
Examples
Configuring the GigabitEthernet Interface: Example
!
interface GigabitEthernet0/0
description GE int to HR group
ip address 172.16.3.3 255.255.255.0
duplex auto
speed auto
no shutdown
!
Sample Output for the show ip interface brief Command
Router# show ip interface brief
Interface
GigabitEthernet0/0
GigabitEthernet0/1
Router#

Specifying a Default Route or Gateway of Last Resort

This section describes how to specify a default route with IP routing enabled. For alternative methods of
specifying a default route, see the
The Cisco IOS software uses the gateway (router) of last resort if it does not have a better route for a
packet and if the destination is not a connected network. This section describes how to select a network
as a default route (a candidate route for computing the gateway of last resort). The way in which routing
protocols propagate the default route information varies for each protocol.
For comprehensive configuration information about IP routing and IP routing protocols, see Cisco IOS
IP Configuration Guide. In particular, see the "Configuring IP Addressing" chapter and all "Part 2: IP
Routing Protocols" chapters.

IP Routing

You can configure integrated routing and bridging (IRB) so the router can route and bridge
simultaneously. The router will act as an IP host on the network whether routing is enabled or not. To
read more about IRB see the following URL at Cisco.com:
http://www.cisco.com/en/US/tech/tk389/tk815/tk855/tsd_technology_support_sub-protocol_home.html
IP routing is automatically enabled in the Cisco IOS software. When IP routing is configured, the system
will use a configured or learned route to forward packets, including a configured default route.
This task section does not apply when IP routing is disabled. To specify a default route when IP routing
Note
is disabled, see the
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
A-8
IP-Address
172.16.3.3
unassigned
Configuring a Gateway of Last Resort Using IP Commands
Configuring a Gateway of Last Resort Using IP Commands
Appendix A Cisco IOS CLI for Initial Configuration
OK? Method Status
YES NVRAM up
YES NVRAM administratively down down
Protocol
up
tech note.
tech note at Cisco.com.