Cisco Expressway Administrator Guide (X15.4) - Clustering and Peers

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_clustering-and-peers.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

• Cluster peers share bandwidth usage information, so bandwidth consumed in a subzone or pipe by one peer is unavailable to the other peers. in context
• Trusted CA certificates, the server certificate and CRLs must be uploaded to each Expressway peer individually; they are not replicated. in context
• DNS server settings are peer-specific and are not replicated; each peer can use a different set of DNS servers. in context
• An H.323 endpoint registering to one peer receives a list of alternate gatekeepers containing the IP addresses of all other cluster peers in random order. in context
• A call between endpoints registered to different peers uses no RMS licence if its media does not traverse the cluster peers. in context
• NTP servers are peer-specific; each peer may use one or more different NTP servers. in context
• SIP endpoints that support RFC 5626 can register simultaneously to multiple Expressway cluster peers. in context
• Configuration changes made on a peer other than the primary are not replicated and will be overwritten at the next replication from the primary. in context
• All peers in an Expressway cluster must use the same TLS verification mode. in context

Cite this source record

APA

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

BibTeX

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