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Searches and Transforms
TANDBERG VIDEO COMMUNICATIONS SERVER ADMINISTRATOR GUIDE
Overview of Searches and Transforms
About Searches
One of the VCS’s functions is to process incoming requests to search for a particular alias. These search requests are received from
•locally registered endpoints
•neighboring systems, including neighbors, traversal clients and traversal servers
•endpoints on the public internet.
Regardless of the origin of the request, the VCS will search its Local Zone and all external zones for the alias. When creating and configuring zones, you assign at least one match and corresponding priority to each zone, and the zones with the highest priority matches (i.e. those with a priority closest to 1) are searched first. In addition, you can use these pattern matching rules to filter searches to specific zones. For full information about configuring searches, see the Zone Searching and Transforming section.
About Transforms
The VCS allows you to transform the alias in a search request if it matches certain criteria. This transformation can be applied to the alias at two points in the search process:
•as soon as it is received and before it is searched for locally
•after call policy has been applied and before sending a search request to the Local Zone and external zones.
You can transform the alias by removing or replacing its prefix, suffix, or the entire string, and by the use of regular expressions.
All Peers in a cluster should be configured identically, including any
Pre-Search Transforms
About Pre-Search Transforms
The
to external zones. It applies to all incoming search requests received from locally registered endpoints, Neighbor, Traversal Client and Traversal Server zones, and endpoints on the public internet. It does not apply to requests received from Peers (which are configured identically and therefore will have already applied the same transform).
Each
Once the alias has been transformed, it remains changed. and all further call processing is applied to the new alias.
Pre-Search Transform Process
Up to 100
Every incoming alias is compared with each transform in order of priority, starting with that closest to 1. If and when a match is made, the transform is applied to the alias and no further
Further transforms of the alias may take place during the
remainder of the search process. This may be as a result of Call Policy (Administrator Policy) or FindMe (User
Policy). If this is the case, the
are not applied to GRQ or RRQ
messages received from endpoints registering with the VCS; endpoints will be registered with the alias(es) as presented in these messages.
will be applied prior to any possible CPL
modification and Zone transforms.
If you add a new
priority as an existing transform, all transforms with a lower priority (i.e. higher numerical value) will have their priority incremented by one, and the new transform will be added with the specified priority. However, if there are not enough “slots” left to move all the priorities down, then you will get an error message.
Introduction | Getting Started |
| Overview and |
| System |
| VCS |
| Zones and | Call | Bandwidth |
| Firewall |
| Applications |
| Maintenance |
| Appendices |
| Status |
| Configuration |
| Configuration |
| Neighbors | Processing | Control |
| Traversal |
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