Information Technology Reference
In-Depth Information
Table3-14 Booting: Client ARP Requests Timeout During Network Boot
Possible Problem
Solution
IP helper address
on intermediate
router is missing
or has been
misconfigured
1.
Check the configurations of all routers in the path. Make sure
that all intermediate routers have an IP helper address
specified that points to the TFTP server.
Syntax:
ip helper-address
address
Syntax description:
address
—Destination broadcast or host address to be used when
forwarding UDP
1
broadcasts. You can have more than one helper
address per interface.
2.
Include helper addresses as required using the
ip
helper-address
interface configuration command.
If you are unicasting to your server, you do not need to use the IP
helper address, but if you are broadcasting to 255.255.255.255
(by omitting the IP address of the server), add the
ip
helper-address
command on the neighboring router interface
used in the network booting broadcast.
1.
UDP = User Datagram Protocol
Booting: Undefined Load Module Error When Network Booting
Symptom:
An undefined load module error occurs during a network boot. The console display indicates
an “undefined load module” error, and the router is incapable of booting.
Table 3-15 outlines the problem that might cause this symptom and describes solutions to that problem.
Table3-15 Booting: Undefined Load Module Error When Network Booting
Possible Problem
Solution
Filename
mismatch
1.
If you are booting manually, refer to the user guide for your
router to see the proper command-line format.
2.
Check the router configuration file. Compare the filename
specified in the
boot system
filename
[
address
] global
configuration command entry with the actual router image
filename. Make sure that they match.
3.
If the filenames differ, change the name in the configuration
file.
Remember to use the router image filename in the
boot system
global configuration command specification and the
configuration filename with the
boot host
and
boot network
global configuration commands.
