Source note · SIP registration failures
RFC 3581 tells clients to retransmit an INVITE about every 20 seconds, even after a provisional response, to keep the UDP NAT binding fresh. This shows the authors expected UDP NAT bindings to be short-lived.
Checked 2026-09-25
- Vendor
- not restricted
- Product
- SIP
- Subsystem
- nat-traversal
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3581
- Checked
- 2026-09-25
Sources
- RFC 3581: An Extension to the Session Initiation Protocol (SIP) for Symmetric Response Routing — IETF / RFC Editor · tier 1 standards and regulators · Section 3 Client Behavior
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-nat-binding-20s. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-nat-binding-20s
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-nat-binding-20s,
title = {SIP registration failures: source note sip-registration-failures-nat-binding-20s},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-nat-binding-20s},
note = {Source note sip-registration-failures-nat-binding-20s, checked 2026-09-25}
}