Before downloading or loading this file, verify your hardware compatibility. This image is universal across all 4500 variants.
Chassis with dual supervisor engines require a more carefully orchestrated sequence to maintain SSO (Stateful Switchover) operation.
Switch# configure terminal Switch(config)# no boot system Switch(config)# boot system flash bootflash:cat4500es8-universalk9.SPA.03.11.05.E.152-7.e5.bin Switch(config)# config-register 0x2102 Switch(config)# end Switch# write memory
The file name includes universalk9 . This indicates it includes (3DES/AES). cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin
By adhering to the pre‑upgrade checks, following the single‑ or dual‑supervisor procedures, and keeping rollback options available, you can successfully deploy version 03.11.05.E across a Catalyst 4500 network with minimal risk. Regular firmware updates deliver critical security patches, new features, and resolved bugs that keep enterprise networks secure and performant.
Switch# copy sftp://user:password@10.1.1.50/cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin bootflash: Use code with caution.
Includes support for 802.1Q tunneling, IGMP Snooping, Resilient Ethernet Protocol (REP), and advanced IPv6 multicast features. High Availability: Before downloading or loading this file, verify your
This specific file, cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin , is a for Catalyst 4500E series switches. Specifically, it belongs to the Release 3.11.5E train, which corresponds to Cisco IOS version 15.2(7)E5 . Key Identification Details
Full MPLS forwarding plane and EVPN. For those features, consider IOS-XE on newer platforms (Catalyst 9000).
This image is – the .e5 build means it’s a mature maintenance release. But it’s also old (circa 2018–2019). For air-gapped networks or legacy setups, it’s fine. For anything else, plan an upgrade to a modern platform. For air-gapped networks or legacy setups
Before downloading the image, confirm that your supervisor engine has sufficient DRAM and bootflash capacity. Cisco documentation emphasizes that you must verify the new software version's minimum DRAM, flash memory, and boot ROM requirements using the release notes. Run the show version command on your switch to display the installed DRAM size and bootflash capacity.
Switch# show version Switch# show redundancy states
: Provides line-rate forwarding for IPv6 Unicast and Multicast traffic up to 125 Mpps. Hardware Compatibility