Source note · IPv6 for voice and UC platforms
Because NAT64 rewrites only IP and transport headers, IPv4 address literals inside SIP headers and SDP c= lines cross a NAT64 untranslated. Without ICE, media latching or an SBC/ALG, an IPv6-only phone behind NAT64 is likely to get one-way or no audio with an IPv4-only SIP peer.
inferred · Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- NAT64 / SDP
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Status
- inferred
- Checked
- 2026-10-02
Sources
- RFC 6889: Analysis of Stateful 64 Translation — IETF / RFC Editor · tier 1 standards and regulators · Section 2.2, item 1 (combined with RFC 6146 scope)
Cite this note
APA
WarmTransfer. (2026, October 2). IPv6 for voice and UC platforms: source note ipv6-voice-nat64-sdp-literals-inference. WarmTransfer. https://warmtransfer.net/knowledge/claims/ipv6-voice-nat64-sdp-literals-inference
BibTeX
@misc{warmtransfer-claim-ipv6-voice-nat64-sdp-literals-inference,
title = {IPv6 for voice and UC platforms: source note ipv6-voice-nat64-sdp-literals-inference},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ipv6-voice-nat64-sdp-literals-inference},
note = {Source note ipv6-voice-nat64-sdp-literals-inference, checked 2026-10-02}
}