System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure Global Dial Plan Replication

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/15/systemConfig/cucm_b_system-configuration-guide-15/cucm_b_system-configuration-guide-14_chapter_010101.html

Published

2026-09-22

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

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

Source notes citing this source

• Advertised patterns summarize a range of enterprise or +E.164 alternate numbers so a single pattern, rather than each number, is replicated across the ILS network. in context
• A directory number can carry an enterprise alternate number and a +E.164 alternate number, each generated by applying a mask to the directory number, and either can be advertised over ILS. in context
• Global Dial Plan Replication depends on the Intercluster Lookup Service (ILS), which must be configured first. in context
• The enterprise or +E.164 alternate number can be designated as the advertised PSTN failover number, but remote clusters still need route patterns that send those failover calls to a gateway. in context
• A caller can dial a directory URI only if the URI's partition is in the caller's calling search space. in context
• GDPR advertises directory URIs, enterprise and E.164 alternate numbers, advertised patterns, PSTN failover numbers and route strings, and can also carry dial plan data imported from non-ILS systems. in context
• The ILS Max Number of Learned Objects in Database service parameter defaults to 100,000 and can be set as high as 1,000,000. in context
• Learned GDPR data goes into four predefined partitions: Global Learned Enterprise Numbers, Global Learned E.164 Numbers, Global Learned Enterprise Patterns and Global Learned E.164 Patterns; learned numbers cannot be assigned to a NULL partition. in context
• Global Dial Plan Replication (GDPR) uses ILS as its transport and replicates global dial plan data to the remote clusters in the ILS network, so ILS must be configured first. in context
• A GDPR PSTN failover number gives an alternate route when a call to a global dial plan element fails over the VoIP path. in context
• Route strings identify each dial plan element's home cluster, and each remote cluster needs SIP route patterns that route learned route strings back to their home clusters. in context
• The SIP route patterns that match GDPR route strings use the Domain Routing pattern usage. in context
• Cisco's GDPR task flow is: enable ILS support, configure SIP profiles, configure SIP trunks, configure SIP route patterns, set database limits and assign partitions, then optionally set advertised patterns, block learned patterns and import dial plan data, and finally provision dial plan data. in context
• ILS and GDPR only replicate dial plan data; intercluster calls still travel over SIP trunks selected by SIP route patterns, so a working ILS catalog does not by itself make intercluster calls succeed. inferred in context
• By default the user portion of a directory URI is case-sensitive; the URI Lookup Policy setting changes this. in context
• The SIP trunk Calling and Connected Party Info Format setting defaults to Deliver DN only in connected party; the alternatives are URI only if available, or URI and DN (blended) if available. in context
• A directory number can carry up to five line-based directory URIs, in addition to the user-based URI. in context
• The SIP profile option Send ILS Learned Destination Route String can be enabled to route intercluster calls across a Cisco Unified Border Element. in context
• For ILS-based URI routing, the SIP profile's Use Fully Qualified Domain Name in SIP Requests option must be enabled. in context
• The user portion of a directory URI can be at most 47 characters. in context

Cite this source record

APA

WarmTransfer. (2026, September 22). System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure Global Dial Plan Replication. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-sysconfig-15-gdpr

BibTeX

@misc{warmtransfer-cisco-cucm-sysconfig-15-gdpr,
  title  = {System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure Global Dial Plan Replication},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-sysconfig-15-gdpr},
  note   = {Cisco Systems, accessed 2026-09-25}
}