Cisco Expressway Administrator Guide (X15.4) - Expressway Capacity and Sizing

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/admin_guide/X15-4/exwy_b_cisco-expressway-administrator-guide-x154/exwy_m_expressway-capacity-and-sizing.html

Published

2026-02-09

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

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

Source notes citing this source

• From X14.2, in the 4+1 redundancy model up to five Expressway systems can be clustered for a total capacity of four times a single system, with one node counted as redundancy. in context
• From X14.2, in the 5+1 redundancy model up to six Expressway systems can be clustered for a total capacity of five times a single system, with one node counted as redundancy. in context
• Cisco cautions that Expressway capacity figures assume single-service scenarios and that capacity limits cannot be given for individual, specific deployments. in context
• In X15.x a standalone Large VM Expressway is rated for 5,000 native registrations, 500 video or 1,000 audio calls, and 3,500 MRA registrations. in context
• Cisco's X15.4 documentation is internally inconsistent on the maximum capacity multiplier of an Expressway cluster: the cluster deployment guide says four times with no gain after four peers, while the Administrator Guide capacity chapter describes a 5+1 model yielding five times. disputed in context

Cite this source record

APA

WarmTransfer. (2026, February 9). Cisco Expressway Administrator Guide (X15.4) - Expressway Capacity and Sizing. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-exwy-admin-x154-capacity

BibTeX

@misc{warmtransfer-cisco-exwy-admin-x154-capacity,
  title  = {Cisco Expressway Administrator Guide (X15.4) - Expressway Capacity and Sizing},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-exwy-admin-x154-capacity},
  note   = {Cisco Systems, accessed 2026-09-25}
}