Preferred Architecture for Cisco Collaboration 14 Enterprise On-Premises Deployments, CVD - Collaboration Edge

Publisher

Cisco

URL

https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Collaboration/enterprise/14/collbcvd/edge.html

Published

2021-05-21

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

• When the same Expressway and Unified CM serve both MRA and B2B, the SIP port on the Unified CM trunk used for B2B must be changed from the default 5060 or 5061. in context
• The DNS zone for B2B URI routing is created on the Expressway-E, not the Expressway-C. in context
• With SIP-to-H.323 interworking enabled, the Expressway-E DNS zone can automatically try the other protocol when looking up a remote domain. in context
• Where no MRA shares the Expressway pair or Unified CM cluster, the documented requirement to move the B2B trunk off 5060/5061 does not directly apply, though the neighbor zone and trunk ports must still match. inferred in context
• The Preferred Architecture recommends CPL rules that allow only specific destinations and discard everything else, with an example rejecting calls whose From address claims the organisation's own domain. in context
• Cisco's Preferred Architecture advises that H.323 should be turned off as a security best practice, while acknowledging business reasons may prevent it. in context
• When H.323 is enabled for B2B, Cisco's Preferred Architecture says SIP-to-H.323 interworking should be set to On for the Expressway-E. in context
• The Preferred Architecture pairs CPL with the Expressway 'SIP authentication failure' intrusion protection rule, which jails a source IP after repeated failures within a detection window. in context
• Cisco's Preferred Architecture states unauthenticated calls should be restricted from reaching protected resources such as the PSTN, including via the Calling Search Space on Unified CM. in context

Cite this source record

APA

WarmTransfer. (2021, May 21). Preferred Architecture for Cisco Collaboration 14 Enterprise On-Premises Deployments, CVD - Collaboration Edge. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cvd-pa-collab14-edge

BibTeX

@misc{warmtransfer-cisco-cvd-pa-collab14-edge,
  title  = {Preferred Architecture for Cisco Collaboration 14 Enterprise On-Premises Deployments, CVD - Collaboration Edge},
  author = {{WarmTransfer}},
  year   = {2021},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cvd-pa-collab14-edge},
  note   = {Cisco, accessed 2026-09-25}
}