Source note · Unified CM intercluster trunks
An ILS join that fails with a self-signed certificate verification error is fixed by importing the remote cluster's Tomcat certificate into the tomcat-trust store, or by using TLS with CA-signed certificates.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- Intercluster Lookup Service
- Deployment
- on-premises
- Region
- not restricted
- Release range
- written against 11.5
- Checked
- 2026-09-25
Sources
- Configure and Troubleshoot Joining Clusters for ILS — Cisco Systems · tier 2 current vendor documentation · Troubleshoot > TLS authentication
Cite this note
APA
WarmTransfer. (2026, September 25). Unified CM intercluster trunks: source note cucm-intercluster-trunks-ils-err-self-signed. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-intercluster-trunks-ils-err-self-signed
BibTeX
@misc{warmtransfer-claim-cucm-intercluster-trunks-ils-err-self-signed,
title = {Unified CM intercluster trunks: source note cucm-intercluster-trunks-ils-err-self-signed},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-intercluster-trunks-ils-err-self-signed},
note = {Source note cucm-intercluster-trunks-ils-err-self-signed, checked 2026-09-25}
}