Cisco Cisco IPS 4255 Sensor

Verify that you have access to the TFTP server by pinging it from the local Ethernet port: 

rommon> ping server_ip_address

rommon> ping server

Specify the filename on the TFTP file server from which you are downloading the image:

rommon> file filename

Example: 

rommon> file IDS-4215-bios-5.1.7-rom-1.4.bin

The syntax of the file location depends on the type of TFTP server used. Contact your system or 
network administrator for the appropriate syntax if the above format does not work.

Download and run the update utility:

rommon> tftp

Type 

 at the upgrade prompt and the update is executed. 

IDS-4215 reboots when the update is complete.

Do not remove power to IDS-4215 during the update process, otherwise the upgrade can get corrupted. 
If this occurs, IDS-4215 will be unusable and require an RMA. 

For the procedure for locating software on Cisco.com, see 

This section provides information on upgrading to IPS 5.1(8)E3. It contains the following topics:

The following caveats apply to upgrading to 5.1(8)E3:

The sensor must show version 5.0(1) or later before you can apply this service pack.

Installing5.1(8)E3 completely reimages the sensor. Sensor configuration settings are maintained, 
but all data written to the Event Store and any unsupported customizations are lost.

We strongly advise you to save a copy of the current configuration settings of the sensor to an FTP 
server before you upgrade.