B-2
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-03
Appendix B Resolving Common Image Installation Problems
Adding the Default Gateway in the Configuration
To add the default gateway, type the ip default-gateway command in the global configuration mode:
ip default-gateway [ip address]
Syntax Description
Verifying the TFTP Server and Router are in the Same Network
You will need to compare the IP addresses and masks of the TFTP server and the Ethernet interface of
the router.
Example 1
The TFTP server IP address is 172.17.247.195 and the mask is 255.255.0.0. The interface Ethernet 0 of
the router IP address is 172.17.3.192 and the mask is 255.255.0.0. In this example, the TFTP server and
this interface of the router are in the same network, so a default gateway is not required.
Example 2
The TFTP server IP address is 172.17.247.195 and the mask is 255.255.0.0. The interface Ethernet 0 of
the router IP address is 172.10.3.192 and the mask is 255.255.0.0. In this example, they are on different
IP networks so it is necessary to configure a default gateway on the router.
Determining the IP Address and Mask on the Router
Look for the IP address command under the interface Ethernet statement in your configuration.
Example
Router> en
Password:
Router# show run
Building configuration...
Current configuration:
!
version 11.3
service timestamps debug uptime
...................
interface Ethernet0
ip address 172.17.3.192 255.255.0.0
ip address
The IP address of the router.
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