Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - Delayed Offer to Early Offer

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_do-to-eo.html

Published

2026-04-25

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco copyright; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• CUBE's Delayed Offer to Early Offer (DO-EO) feature converts a delayed-offer INVITE it receives into an early-offer INVITE on the outgoing leg. in context
• To use DO-EO in media flow-around mode on CUBE, media flow-around must be configured separately before the DO-EO settings. in context
• With early-offer forced, CUBE builds the outgoing Early Offer INVITE for an incoming Delayed Offer call from its locally configured codec list rather than from the calling side's media capabilities. in context
• CUBE early-offer forced can be enabled per dial peer with the command voice-class sip early-offer forced. in context
• CUBE early-offer forced can be enabled globally under voice service voip > sip with the command early-offer forced. in context
• The CUBE guide describes CUBE sending its own local IP address in the initial Early Offer INVITE and then generating a locally triggered re-INVITE to convey the sender's SDP details once known. in context
• CUBE DO-EO mid-call renegotiation fails if midcall-signaling block or midcall-signaling passthru media-change is configured. in context
• CUBE cannot change the IP address or port in the response to a locally triggered DO-EO re-INVITE. in context
• CUBE does not trigger DO-EO renegotiation if the initial call uses transcoding. in context
• CUBE does not support DO-EO with media flow-around for video calls. in context
• The early-offer forced renegotiate option triggers a mid-call delayed-offer re-INVITE only for specific codecs (aacld, h263, h263+, h264, mp4a), while renegotiate always triggers it for all codecs. in context

Cite this source record

APA

WarmTransfer. (2026, April 25). Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - Delayed Offer to Early Offer. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cube-xe-do-to-eo

BibTeX

@misc{warmtransfer-cisco-cube-xe-do-to-eo,
  title  = {Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - Delayed Offer to Early Offer},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cube-xe-do-to-eo},
  note   = {Cisco Systems, accessed 2026-09-25}
}