Cisco Cisco Expressway Maintenance Manual
Field
Description
Usage tips
Pattern
behavior
behavior
Specifies how the matched part of the alias is
modified. Options are:
modified. Options are:
Strip: the matching prefix or suffix is removed.
Replace: the matching part of the alias is
substituted with the text in the Replace string.
substituted with the text in the Replace string.
Add Prefix: prepends the Additional text to the
alias.
alias.
Add Suffix: appends the Additional text to the
alias.
alias.
Replace string
The string to substitute for the part of the alias that
matches the pattern.
matches the pattern.
Only applies if the Pattern behavior is
Replace.
Replace.
You can use regular expressions.
Additional text
The string to add as a prefix or suffix.
Only applies if the Pattern behavior is Add
Prefix or Add Suffix.
Prefix or Add Suffix.
State
Indicates if the transform is enabled or not.
Use this setting to test configuration
changes, or to temporarily disable certain
rules. Any disabled rules still appear in the
rules list but are ignored.
changes, or to temporarily disable certain
rules. Any disabled rules still appear in the
rules list but are ignored.
Click on the transform you want to configure (or click New to create a new transform, or click Delete to remove a
transform).
transform).
Search and Zone Transform Process
have been
applied.
The process is as follows:
1.
The Expressway 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.
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.
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.
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 call is
forwarded to the zone that responds first.
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,
depending on the
depending on the
.
—
If the search returns a new URI or alias (for example, due to an ENUM lookup, or the response from a policy
service), the entire
service), the entire
starts again
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Cisco Expressway Administrator Guide