1. The "write net" command enables you to store the current configuration to a file on TFTP server.
2. The "configure net" command merges the current running configuration with the TFTP configuration stored at the IP address you specify and the file you name.
3. Use the tftp-server command with the configure net command to read from the configuration or with the write net command to store the configuration in the file you specify.
NOTE: If you specify both the IP address and full path in the tftp-server command, the server_ip and filename in the configure net and write net command can be omitted or represented with a colon (:)
The syntax for the tftp-server command is as follows:
tftp-server interface_name ip_address path
interface_name ---> Interface name on which TFTP server resides. If not specified, an internal interface is assumed.
ip_address ---> IP address of the TFTP server.
path ---> The path and filename of the configuration file.
The syntax for the write net and configure net commands is as follows:
write net server_ip:filename
configure net server_ip:filename
server_ip ---> IP address of a TFTP host available across the network. If you specify a server with the tftp-server command, do not specify it in write net or configure net commands. Instead, use only a colon (:) without a server IP address
filename ---> A filename you specify to qualify the location of the configuration file on the TFTP server. If you set a filename with the tftp-server command, do not specify it in write net or configure net commands. Instead, use only a colon (:) without a server IP address.
The following example shows the commands required to specify the TFTP server address as 10.0.0.1 and the path to the file "config" as pix/configuration. The "configure net" command tells the PIX/ASA to read the configuration file "config" and merge it with the current running configuration. The "write net" command tells the PIX/ASA Firewall to store the resulting configuration in "config" file (the file is overwritten in this case.):
ASA(config)# tftp-server 10.0.0.1 inside pix/configuration/config
ASA(config)# configure net :
ASA(config)# write net :
