Cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin May 2026

verify /md5 bootflash:cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin

A known defect (CSCvk01423) in early 15.2(7)E builds caused high CPU on the IOSd process due to a syslog loop. This is fixed in e5. If you see CPU above 30% at idle after boot, ensure you have: cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin

Switch(config)# no logging console
Switch(config)# service timestamps debug datetime msec localtime

This software release is part of the IOS XE 3.x train, designed specifically for the Catalyst 4500 Supervisor Engine 8-E. It is a mature, Extended Maintenance (EM) release. verify /md5 bootflash:cat4500es8-universalk9

Verdict: Highly Stable & Recommended for Standard Enterprise Access/Distribution Layers. If you are running Supervisor 8-E hardware and require a rock-solid environment without needing the absolute latest feature sets introduced in IOS XE Denali (16.x) or Everest (17.x), this is likely the most stable version available in the 3.x train. This software release is part of the IOS XE 3

The 4500 series (especially older supervisors like the 6/E, 7/E, 8/E) and IOS 15.2(7)E trains are past Cisco’s End of Support. No new security patches or bug fixes.