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In order to restore a configuration file to an exact copy of a file stored on a server, you need to copy the
configuration file directly to the startup configuration (using the copy tftp startup-config command) and
reload the router.
To copy a configuration file from a TFTP server to the router, use the following commands in EXEC mode:
Command
Purpose
copy tftp
[[[//location]/directory]/filename]
running-config
or
copy tftp[[[//location]/directory]/filename]
startup-config
Copy a file from a TFTP server to the router.
Reply to any router prompts for additional information or confirmation. Additional prompts will depend on
how much information is provided in the copy command and the current setting of the file prompt command.
In the following example, the software is configured from the file my-config at IP address 192.168.123.59:
Router# copy tftp://192.168.123.59/my-confg running-config
Download file ‘my-config’ from 192.168.123.59 to running-config? [y/n] y
Accessing tftp://192.168.123.59/my-config...
[OK] 487 bytes copied in time <1 sec
Updating running-config...
To clear the saved configuration, use the following command from privileged mode:
Router# erase startup-config
4.3 Configuring SNMP and Spanning Tree
This section discusses the following tasks needed to configure Simple Network Management Protocol
(SNMP) and Spanning Tree Protocol (STP).
4.3.1 Configuring SNMP Support
The Simple Network Management Protocol (SNMP) system consists of three parts: an SNMP manager, an
SNMP agent, and a Management Information Base (MIB). SNMP is an application-layer protocol that allows
SNMP manager and agent stations to communicate. SNMP provides a message format for sending
information between an SNMP manager and an SNMP agent. The agent and MIB reside on the router. In
configuring SNMP on the router, the relationship between the manager and the agent must be defined.
The SNMP agent gathers data from the MIB, which holds the information about device parameters and
network data. The agent also responds to the manager’s requests to get or set data. An agent can also
send unsolicited traps to the manager. Traps are messages alerting the SNMP manager to a specific event
on the network. Such events include improper user authentication, restarts, link status (up or down), closing
of a TCP connection, or loss of connection to a neighboring router. An SNMP manager can request a value
from an agent, or store or change a value in that agent.
To configure support for SNMP on the router, perform the following tasks:
• Create or Modify Access Control for SNMP Community
• Establish the Contact and Location of SNMP Agent
• Define SNMP Trap Operations
• Disable the SNMP Agent