The proven performance and user-friendly design of. File Name: tftpserver. File Name: tftpsetup. File Name: tftpserver-setup. File Name: tftpdwin. The router is not a fully functional TFTP server. It can only serve files for download. You cannot use this feature to upload files into the serving router's local flash. However, the router is not limited to just serving IOS images. You can use your router's flash to store configuration files and make them available for download via TFTP as well.
Moreover, you can even use it to hold configuration files for nonCisco equipment. You can also increase the security of the router's TFTP server by using an access-list like this:. Router config tftp-server bootflash:cp-adventerprisek9-mz. What would happen if I used the following? Would be used for both theboot and system with as backup? Buy or Renew. Find A Community. Cisco Community. Thank you for your support!
We're happy to announce that we met our goal for the Community Helping Community campaign! Additionally, there are excellent TFTP server packages offered for sale. Security features—Security features may be an important consideration based on the location of the TFTP server in your network.
Check the size of your image and verify that the TFTP server you have in mind supports large transfers, if needed.
There are a variety of problems which may occur when you use TFTP for maintenance. Technical Support - Cisco Systems provides platform-specific information on how to troubleshoot. With this program, you can also configure a hostname and an enable secret password. It gives you the option of assigning a Telnet password to provide security during remote management and configuring your switch as a command or member switch of a cluster or as a standalone switch.
If you are using DHCP, do not respond to any of the questions in the setup program until the switch receives the dynamically assigned IP address and reads the configuration file. If you are an experienced user familiar with the switch configuration steps, manually configure the switch. Otherwise, use the setup program described in the Boot Process section. DHCP provides configuration information to Internet hosts and internetworking devices.
This protocol consists of two components: one for delivering configuration parameters from a DHCP server to a device and an operation for allocating network addresses to devices. DHCP is built on a client-server model, in which designated DHCP servers allocate network addresses and deliver configuration parameters to dynamically configured devices. A relay device forwards broadcast traffic between two directly connected LANs. A router does not forward broadcast packets, but it forwards packets based on the destination IP address in the received packet.
When you boot up your switch , the DHCP client is invoked and requests configuration information from a DHCP server when the configuration file is not present on the switch. If the configuration file is present and the configuration includes the ip address dhcp interface configuration command on specific routed interfaces, the DHCP client is invoked and requests the IP address information for those interfaces.
With this message, the client and server are bound, and the client uses configuration information received from the server. The amount of information the switch receives depends on how you configure the DHCP server. The offer from the DHCP server is not a guarantee that the IP address is allocated to the client; however, the server usually reserves the address until the client has had a chance to formally request the address.
If the switch accepts replies from a BOOTP server and configures itself, the switch broadcasts, instead of unicasts, TFTP requests to obtain the switch configuration file. The configuration files on all clients are identical except for their DHCP-obtained hostnames. If a client has a default hostname the hostname name global configuration command is not configured or the no hostname global configuration command is entered to remove the hostname , the DHCP hostname option is not included in the packet when you enter the ip address dhcp interface configuration command.
In this case, if the client receives the DCHP hostname option from the DHCP interaction while acquiring an IP address for an interface, the client accepts the DHCP hostname option and sets the flag to show that the system now has a hostname configured. You can use the DHCP image upgrade features to configure a DHCP server to download both a new image and a new configuration file to one or more switches in a network.
Simultaneous image and configuration upgrade for all switches in the network helps ensure that each new switch added to a network receives the same image and configuration. The DHCP-based autoconfiguration with a saved configuration process stops if there is not at least one Layer 3 interface in an up state without an assigned IP address in the network. Unless you configure a timeout, the DHCP-based autoconfiguration with a saved configuration feature tries indefinitely to download an IP address.
The auto-install process stops if a configuration file cannot be downloaded or if the configuration file is corrupted. The configuration file that is downloaded from TFTP is merged with the existing configuration in the running configuration but is not saved in the NVRAM unless you enter the write memory or copy running-configuration startup-configuration privileged EXEC command. If the downloaded configuration is saved to the startup configuration, the feature is not triggered during subsequent system restarts.
The downloaded configuration file becomes the running configuration of the switch. It does not over write the bootup configuration saved in the flash, until you reload the switch.
You can use DHCP auto-image upgrade with DHCP autoconfiguration to download both a configuration and a new image to one or more switches in your network. The switch or switches downloading the new configuration and the new image can be blank or only have a default factory configuration loaded.
If the new configuration is downloaded to a switch that already has a configuration, the downloaded configuration is appended to the configuration file stored on the switch. Any existing configuration is not overwritten by the downloaded one.
After you install the switch in your network, the auto-image update feature starts. The downloaded configuration file is saved in the running configuration of the switch , and the new image is downloaded and installed on the switch. When you reboot the switch , the configuration is stored in the saved configuration on the switch. You should configure the DHCP server with reserved leases that are bound to each switch by the switch hardware address.
Router IP address default gateway address to be used by the switch required. Boot filename the name of the configuration file that the client needs recommended. Depending on the settings of the DHCP server, the switch can receive IP address information, the configuration file, or both. If you do not configure the DHCP server with the lease options described previously, it replies to client requests with only those parameters that are configured.
If the IP address and the subnet mask are not in the reply, the switch is not configured. Unavailability of other lease options does not affect autoconfiguration.
The switch can act as a DHCP server. These features are not operational. If you did not specify the configuration filename, the TFTP server, or if the configuration file could not be downloaded, the switch attempts to download a configuration file by using various combinations of filenames and TFTP server addresses.
The files include the specified configuration filename if any and these files: network-config, cisconet. For the switch to successfully download a configuration file, the TFTP server must contain one or more configuration files in its base directory. The files can include these files:. The configuration file named in the DHCP reply the actual switch configuration file.
The network-confg or the cisconet. The router-confg or the ciscortr. The preferred solution is to configure the DHCP server with all the required information. The TFTP server contains the configuration files for the switch.
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