Source note · SIP call forwarding and routing loops
Expressway detects circular references in its dial plan (an alias transformed and later transformed back) and ends that search branch with a 'policy loop detected' error.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Expressway
- Subsystem
- dial plan / search rules
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X15.2 (same text in X14.x guides per search results)
- Checked
- 2026-09-25
Sources
- Cisco Expressway Administrator Guide (X15.2) - Dial Plan and Call Processing — Cisco Systems · tier 2 current vendor documentation · Call routing process / circular references
Cite this note
APA
WarmTransfer. (2026, September 25). SIP call forwarding and routing loops: source note sip-forwarding-loops-exwy-policy-loop. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-forwarding-loops-exwy-policy-loop
BibTeX
@misc{warmtransfer-claim-sip-forwarding-loops-exwy-policy-loop,
title = {SIP call forwarding and routing loops: source note sip-forwarding-loops-exwy-policy-loop},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-forwarding-loops-exwy-policy-loop},
note = {Source note sip-forwarding-loops-exwy-policy-loop, checked 2026-09-25}
}