Source note · Setting up certificates on Cisco Expressway
SIP TLS zones may fail to come up when certificates use an 8192-bit key; Cisco recommends 4096 bits.
Checked 2026-09-30
SIP TLS zones may fail to become active if certificates use a key length of 8192 bits.
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- tls
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X15.5
- Checked
- 2026-09-30
Sources
- Cisco Expressway Certificate Creation and Use Deployment Guide (X15.5) - Troubleshooting — Cisco Systems · tier 2 current vendor documentation · Troubleshooting > 8192-bit key certificates
Cite this note
APA
WarmTransfer. (2026, September 30). Setting up certificates on Cisco Expressway: source note expressway-certificate-setup-ts-8192-key. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-certificate-setup-ts-8192-key
BibTeX
@misc{warmtransfer-claim-expressway-certificate-setup-ts-8192-key,
title = {Setting up certificates on Cisco Expressway: source note expressway-certificate-setup-ts-8192-key},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-certificate-setup-ts-8192-key},
note = {Source note expressway-certificate-setup-ts-8192-key, checked 2026-09-30}
}