Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - SRTP-RTP Internetworking

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/ios-xe/config/ios-xe-book/m_voi-srtp-rtp-int.html

Published

2026-04-25

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco documentation terms; no-redistribution; short excerpts and locators only

Source notes citing this source

• From IOS XE Everest 16.5.1b CUBE enables AEAD_AES_256_GCM, AEAD_AES_128_GCM, AES_CM_128_HMAC_SHA1_80 and AES_CM_128_HMAC_SHA1_32 by default. in context
• CUBE SRTP-RTP interworking does not support GCM ciphers with RTP header extensions or more than one video m= line. in context
• Crypto-suite preference on CUBE is set with voice class srtp-crypto; the older srtp-auth command is deprecated. in context
• When one endpoint does not support SRTP, a CUBE call falls back to RTP only if srtp fallback is configured on the relevant dial-peer; otherwise the call fails. in context
• On IOS XE platforms CUBE performs SRTP-to-RTP interworking without DSP resources. in context

Cite this source record

APA

WarmTransfer. (2026, April 25). Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - SRTP-RTP Internetworking. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cube-srtp-rtp-interworking

BibTeX

@misc{warmtransfer-cisco-cube-srtp-rtp-interworking,
  title  = {Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - SRTP-RTP Internetworking},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cube-srtp-rtp-interworking},
  note   = {Cisco Systems, accessed 2026-09-25}
}