Source note · IPv6 for voice and UC platforms
Under RFC 6157 each media description in an SDP answer must use the same network/address type as the matching media description in the offer, so an IP4 offer line cannot be answered with IP6 or the reverse.
Checked 2026-10-02
Each media description in the SDP answer MUST use the same network type as the corresponding media description in the offer.
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- SDP offer/answer
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 6157
- Checked
- 2026-10-02
Sources
- RFC 6157: IPv6 Transition in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Section 4.1
Cite this note
APA
WarmTransfer. (2026, October 2). IPv6 for voice and UC platforms: source note ipv6-voice-rfc6157-answer-same-addrtype. WarmTransfer. https://warmtransfer.net/knowledge/claims/ipv6-voice-rfc6157-answer-same-addrtype
BibTeX
@misc{warmtransfer-claim-ipv6-voice-rfc6157-answer-same-addrtype,
title = {IPv6 for voice and UC platforms: source note ipv6-voice-rfc6157-answer-same-addrtype},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ipv6-voice-rfc6157-answer-same-addrtype},
note = {Source note ipv6-voice-rfc6157-answer-same-addrtype, checked 2026-10-02}
}