"The -UPD- file causes high CPU for process 'Spanning Tree'" Workaround: This is rare, but if seen, disable spanning-tree portfast default on uplinks or downgrade to 15.2(4)E8.
| Component | Meaning | |-----------|---------| | | Target platform: Catalyst 3560E series (including 3560E-12D, 3560E-24TD, 3560E-48PD, etc.) | | universalk9 | Universal image with K9 cryptography (supports both IP Base and IP Services feature sets) | | mz | Memory location: "m" = runs from RAM, "z" = compressed image | | 152-4.e10 | IOS version 15.2(4)E10 — a maintenance release in the 15.2E train | | bin | Binary executable file | | -UPD- | Unofficial user-added tag indicating an update, revision, or patch (not part of the original Cisco filename) | C3560e-universalk9-mz.152-4.e10.bin -UPD-