Source note · Planning a Unified CM upgrade
Version switching installs the new release on the inactive partition so an administrator can switch to it and later revert. Cisco supports it with most direct upgrades but not with migrations.
Checked 2026-09-25
This capability is supported with most direct upgrades, but not with migrations.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- rollback
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Upgrade and Migration Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs - Planning the Upgrade — Cisco Systems · tier 2 current vendor documentation · Planning the Upgrade > Version Switching
Cite this note
APA
WarmTransfer. (2026, September 25). Planning a Unified CM upgrade: source note cucm-upgrade-planning-version-switch-not-migrations. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-version-switch-not-migrations
BibTeX
@misc{warmtransfer-claim-cucm-upgrade-planning-version-switch-not-migrations,
title = {Planning a Unified CM upgrade: source note cucm-upgrade-planning-version-switch-not-migrations},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-version-switch-not-migrations},
note = {Source note cucm-upgrade-planning-version-switch-not-migrations, checked 2026-09-25}
}