Each cluster in an ILS network needs a unique Cluster ID, set under System > Enterprise Parameters on the publisher; ILS does not work if remote clusters keep the default StandAloneCluster value.
Checked 2026-10-01
ILS does not work if your remote clusters retain the default StandAloneCluster value for the cluster ID.
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- Intercluster Lookup Service
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Checked
- 2026-10-01
Sources
- System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure Intercluster Lookup Service — Cisco Systems · tier 2 current vendor documentation · ILS Configuration Task Flow > Configure Cluster IDs
Cite this note
APA
WarmTransfer. (2026, October 1). Setting up ILS and Global Dial Plan Replication in Unified CM: source note cucm-ils-gdpr-setup-cluster-id-unique. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-ils-gdpr-setup-cluster-id-unique
BibTeX
@misc{warmtransfer-claim-cucm-ils-gdpr-setup-cluster-id-unique,
title = {Setting up ILS and Global Dial Plan Replication in Unified CM: source note cucm-ils-gdpr-setup-cluster-id-unique},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-ils-gdpr-setup-cluster-id-unique},
note = {Source note cucm-ils-gdpr-setup-cluster-id-unique, checked 2026-10-01}
}