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duplicate and displays an error message. For example, if the running-config
already contains a command that configures ACL 1, the software rejects ACL 1
in the configuration file, and displays a message that ACL 1 is already
configured.
v The file can contain global CONFIG commands or configuration commands for
interfaces, routing protocols, and so on. You cannot enter User EXEC or
Privileged EXEC commands.
v The default CLI configuration level in a configuration file is the global CONFIG
level. Thus, the first command in the file must be a global CONFIG command or
" ! ". The ! (exclamation point) character means "return to the global CONFIG
level".
Note: You can enter text following " ! " as a comment. However, the " !" is not
a comment marker. It returns the CLI to the global configuration level.
Note: The CLI changes to the global CONFIG level if you load the configuration
as a startup-config file instead of the running-config (using the copy tftp
startup-config <ip-addr> <filename> command or ncopy tftp
<ip-addr> <from-name> startup-config command).
Note: If you copy-and-paste a configuration into a management session, the CLI
ignores the " ! " instead of changing the CLI to the global CONFIG level.
As a result, you might get different results if you copy-and-paste a
configuration instead of loading the configuration using TFTP.
v Make sure you enter each command at the correct CLI level. Since some
commands have identical forms at both the global CONFIG level and individual
configuration levels, if the CLI's response to the configuration file results in the
CLI entering a configuration level you did not intend, then you can get
unexpected results.
For example, if a trunk group is active on the device, and the configuration file
contains a command to disable STP on one of the secondary ports in the trunk
group, the CLI rejects the commands to enter the interface configuration level for
the port and moves on to the next command in the file you are loading. If the
next command is a spanning-tree command whose syntax is valid at the global
CONFIG level as well as the interface configuration level, then the software
applies the command globally. Here is an example:
The configuration file contains these commands:
interface ethernet1/2
no spanning-tree
The CLI responds like this:
NetIron(config)# interface ethernet 1/2
Error - cannot configure secondary ports of a trunk
NetIron(config)# no spanning-tree
NetIron(config)#
v If the file contains commands that must be entered in a specific order, the
commands must appear in the file in the required order. For example, if you
want to use the file to replace an IP address on an interface, you must first
remove the old address using "no" in front of the ip address command, then
add the new address. Otherwise, the CLI displays an error message and does
not implement the command. Here is an example:
The configuration file contains these commands:
interface ethernet 1/1
ip address 10.10.10.1/24
Chapter 7. Upgrading software images and configuration files
55
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