Configuring Search Rules - Cisco TelePresence Administrator's Manual

Dial plan and call processing
The process is as follows:
1. The VCS applies the search rules in priority order (all rules with a priority of 1 are processed first, then
priority 2 and so on) to see if the given alias matches the rules criteria based on the Source of the query
and the rule Mode.
2. If the match is successful, any associated zone transform (where the Mode is Alias pattern match and the
Pattern behavior is Replace or Strip) is applied to the alias.
3. The search rule's Target zone or policy service is queried (with the revised alias if a zone transform has
been applied) using the same protocol (SIP or H.323) as the incoming call request. Note that if there are
many successful matches for multiple search rules at the same priority level, every applicable Target is
queried.
If the alias is found, the call is forwarded to that zone. If the alias is found by more than one zone, the
l
call is forwarded to the zone that responds first.
If the alias is not found using the native protocol, the query is repeated using the interworked protocol,
l
depending on the interworking
If the search returns a new URI or alias (for example, due to an ENUM lookup, or the response from a
l
policy service), the entire
4. If the alias is not found, the search rules with the next highest priority are applied (go back to step 1) until:
the alias is found, or
l
all target zones and policy services associated with search rules that meet the specified criteria have
l
been queried, or
a search rule with a successful match has an On successful match setting of Stop searching
l
Note the difference between a successful match (where the alias matches the search rule criteria) and an
alias being found (where a query sent to a target zone is successful). The Stop searching option provides
better control over the network's signaling infrastructure. For example, if searches for a particular domain
should always be routed to a specific zone this option lets you make the search process more efficient and
stop the VCS from searching any other zones unnecessarily.

Configuring search rules

The Search rules page (Configuration > Dial plan > Search
routes incoming search requests to the appropriate target zones (including the Local Zone) or policy services.
The page lists all the currently configured search rules and lets you create, edit, delete, enable and disable
rules. You can click on a column heading to sort the list, for example by Target or Priority. If you hover your
mouse pointer over a search rule, the rule description (if one has been defined) appears as a tooltip.
Up to 2000 search rules can be configured. Priority 1 search rules are applied first, followed by all priority 2
search rules, and so on.
The configurable options are:
Field Description
Rule name A descriptive name for the search rule.
Description An optional free-form description of the search
rule.
Cisco VCS Administrator Guide (X8.1.1)
mode.
Call routing process [p.172]
About transforms and search rules
starts again
rules) is used to configure how the VCS
Usage tips
The description appears as a tooltip if you
hover your mouse pointer over a rule in the
list.
Page 179 of 507