Source note · Unified CM Device Mobility
When a device's IP address matches more than one Device Mobility Info subnet, Unified CM picks the subnet with the most bits in its mask (longest match rule); for example 9.9.8.2 matches 9.9.8.0/24 rather than 9.9.0.0/16.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- device-mobility-info
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 15 and SUs
- Checked
- 2026-09-25
Sources
- Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Device Mobility — Cisco Systems · tier 2 current vendor documentation · Device Mobility Overview, subnet matching description and 9.9.8.2 example
Cite this note
APA
WarmTransfer. (2026, September 25). Unified CM Device Mobility: source note cucm-device-mobility-longest-match. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-device-mobility-longest-match
BibTeX
@misc{warmtransfer-claim-cucm-device-mobility-longest-match,
title = {Unified CM Device Mobility: source note cucm-device-mobility-longest-match},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-device-mobility-longest-match},
note = {Source note cucm-device-mobility-longest-match, checked 2026-09-25}
}