So, here’s an article I wrote for CSC as part of Chalk Talk series. This article walks through the basics of SIP URI dialing and ILS networking as well as touches blended addressing in CUCM. The article is published as part of Cisco’s Technical Services Newsletter, July issue http://www.cisco.com/web/services/technical-services-newsletter/index.html
Here’s the excerpt from the article:
Cisco Collaboration solutions offer much more than just traditional ways to communicate within and outside of an enterprise network. Complementing the next generation communication solutions such as SIP gateways, SIP endpoints, Jabber, WebEx etc., Cisco Unified Communications Manager (CUCM) has evolved to a degree that it can work and integrate with multiple platforms and can serve multitude endpoints. This article highlights features and benefits of the recent inclusion – SIP Uniform Resource Identifier (URI) based dialing as well as support for Intercluster Lookup Service (ILS) Networking.
SIP URI Dialing
In context of Cisco Collaboration, SIP URI can be best compared to an email address such as firstname.lastname@example.org. The URI format is usually general form: sip:user:password@host:port;uri-parameters?headers. This format has been used by SIP dominant networks for years and is now gaining universal popularity because of its globally routable (DNS-based) nature/capability. A SIP URI can be automatically imported from LDAP (provided the cluster is integrated with an LDAP server) such as a mail or the msRTCSIP-primaryuseraddress attribute.
Following are salient features of SIP URI:
- In a SIP URI a user name is optional however, CUCM does not support URIs without a user name
- URI parameters and headers are optional
- The user name is case sensitive however host is case insensitive (RFC 3261). This parameter is configurable starting CUCM 9.1 (under Enterprise Parameters – URI lookup policy)
For full article please go to https://supportforums.cisco.com/document/12243806/chalk-talk-cucm-based-sip-uri-dialing-and-ils-networking
SIP URI and ILS Networking are important concepts from CCIE Collaboration exam perspective. For in depth information about these concepts and how to deploy them in a CUCM intra/inter cluster environment please read CCIE Collaboration Quick Reference
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