Source note · DNS SRV and service discovery for SIP
CUBE always attempts a DNS SRV lookup first for an FQDN session target and falls back to an A/AAAA lookup if the SRV lookup fails.
Checked 2026-09-24
The DNS SRV lookup is always attempted first for a Fully Qualified Domain Name (FQDN).
- Vendor
- Cisco
- Product
- CUBE on IOS XE
- Subsystem
- DNS resolution
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.6 onwards
- Checked
- 2026-09-24
Sources
- Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - Configure and Troubleshoot DNS Resolution — Cisco Systems · tier 2 current vendor documentation · Configure and Troubleshoot DNS Resolution, Overview
Cite this note
APA
WarmTransfer. (2026, September 24). DNS SRV and service discovery for SIP: source note dns-srv-voice-cube-srv-first. WarmTransfer. https://warmtransfer.net/knowledge/claims/dns-srv-voice-cube-srv-first
BibTeX
@misc{warmtransfer-claim-dns-srv-voice-cube-srv-first,
title = {DNS SRV and service discovery for SIP: source note dns-srv-voice-cube-srv-first},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dns-srv-voice-cube-srv-first},
note = {Source note dns-srv-voice-cube-srv-first, checked 2026-09-24}
}