Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - Call Admission Control

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-cube-call-admission-control.html

Published

2026-04-25

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco website terms of use; copyrighted; no-redistribution; short excerpts and locators only

Source notes citing this source

• CUBE sends an error code when a call spike rejects a call, and that error code is configurable. in context
• CUBE call spike detection watches the call arrival rate over a moving window and rejects calls above the configured threshold, which Cisco says protects against INVITE-based DoS attacks. in context
• CUBE call spike can be set globally or per dial-peer, and when both are set the dial-peer setting takes precedence. in context
• CUBE call spike takes a call count from 1 to 2147483647, a step count from 3 to 10, and a step size from 100 to 250 milliseconds. in context
• CUBE call threshold global can admit or reject calls based on cpu-5sec, cpu-avg, io-mem, proc-mem, total-calls or total-mem, each with low and high thresholds. in context

Cite this source record

APA

WarmTransfer. (2026, April 25). Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - Call Admission Control. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cube-xe176-call-admission-control

BibTeX

@misc{warmtransfer-cisco-cube-xe176-call-admission-control,
  title  = {Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - Call Admission Control},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cube-xe176-call-admission-control},
  note   = {Cisco Systems, accessed 2026-09-25}
}