Cisco Cisco IPS 4255 Sensor

The BIOS on Cisco IPS sensors is specific to Cisco IPS sensors and must only be upgraded under 
instructions from Cisco with BIOS files obtained from the Cisco website. Installing a non-Cisco or 
third-party BIOS on Cisco IPS sensors voids the warranty. 

The following files are part of Cisco IPS 6.1(1)E2:

Readme File

IPS-6.1-1-E2.readme.txt

Minor Version Upgrade File

IPS-K9-6.1-1-E2.pkg

IPS-AIM-K9-6.1-1-E2.pkg

System Image Files

IPS-4240-K9-sys-1.1-a-6.1-1-E2.img

IPS-4255-K9-sys-1.1-a-6.1-1-E2.img

IPS-4260-K9-sys-1.1-a-6.1-1-E2.img

IPS-4270_20-K9-sys-1.1-a-6.1-1-E2.img

IPS-AIM-K9-sys-1.1-a-6.1-1-E2.img

IPS-IDSM2-K9-sys-1.1-a-6.1-1-E2.bin.gz

IPS-SSM_10-K9-sys-1.1-a-6.1-1-E2.img

IPS-SSM_20-K9-sys-1.1-a-6.1-1-E2.img

IPS-SSM_40-K9-sys-1.1-a-6.1-1-E2.img

Recovery Image Files

IPS-K9-r-1.1-a-6.1-1-E2.pkg

IPS-AIM-K9-r-1.1-a-6.1-1-E2.pkg

E2 Signature Engine Update Files

IPS-engine-E2-req-6.1-1.pkg

For the procedure for obtaining IPS software, see 

.