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D14049.08 
November 2010
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CISCO TELEPRESENCE
 VIDEO COMMUNICATION SERVER
ADMINISTRATOR GUIDE
Subzones
Configuring subzones and membership rules
Configuring subzones
The Subzones page lists all the existing 
manually configurable subzones and lets you 
add, edit or delete subzones.
For each subzone, it shows how many 
membership rules it has, how many devices 
are currently registered to it, and the current 
number of calls and bandwidth in use.
To go to the Subzones page:
• 
VCS configuration > Local Zone > Subzones
Click on the subzone you want to configure (or 
click New to create a new subzone, or click 
Delete to remove a subzone).
Up to 1000 subzones can be configured.
The configurable options are:
Name
Enter the name you want to assign to the 
subzone. This name is used when creating links.
Registration policy
Controls whether registrations assigned to the 
subzone are accepted. See 
 for more details.
Bandwidth
See th
 section for a description of these 
fields.
To add a new subzone using the CLI:
 
To configure an existing subzone using the CLI:
 
Configuring subzone membership rules
The Subzone membership rules page lists all 
the existing subzone membership rules and lets 
you add, edit, delete, enable or disable rules.
Each rule specifies the criteria used to match 
an endpoint registering with the VCS into an 
appropriate subzone.
To go to the Subzone membership rules page:
• 
VCS configuration > Local Zone > Subzone 
membership rules
You can click on a column heading to 
sort the list, for example by Priority or 
Subzone. If you hover your mouse pointer 
over a rule, the rule description (if one has been 
defined) appears as a tooltip.
Click on the rule you want to configure (or click 
New to create a new rule, or click Delete to 
remove a rule).
Up to 3000 subzone membership rules can be 
configured.
Enabling and disabling membership rules
When you are making or testing configuration 
changes to your membership rules, you may 
want to temporarily enable or disable certain 
rules. You can do this by selecting the rule's 
check box and clicking Enable or Disable as 
appropriate. Any disabled rules still appear in 
the rules list but are ignored by the VCS when 
processing registration requests. 
The configurable options are:
Rule name
A descriptive name for the membership rule.
Description
An optional free-form description of the rule.
Priority
The order in which the rules are applied (and 
thus to which subzone the endpoint is assigned) 
if an endpoint's address satisfies multiple rules.
The rules with the highest priority (1, then 2, 
then 3 and so on) are applied first. If multiple 
Subnet rules have the same priority the rule 
with the largest prefix length is applied first. 
Alias Pattern Match rules at the same priority 
are searched in configuration order.
Type
The type of address that applies to this rule:
Subnet: assigns the device if its IP address falls 
within the configured IP address subnet.
Alias Pattern Match: assigns the device if its 
alias matches the configured pattern.
Pattern matching is useful, for example, 
for home workers on dynamic IP 
addresses; rather than having to 
continually update the subnet to match 
what has been allocated, you can match against 
their alias instead.
Subnet address and prefix length
These two fields together determine the range 
of IP addresses that will belong to this subzone. 
(Applies only if the Type is Subnet.)
The Address range field shows the range of 
IP addresses to be allocated to this subzone, 
based on the combination of the Subnet 
address
 and Prefix length.
Pattern type 
How the pattern string must match the alias for 
the rule to be applied. (Applies only if the Type 
is Alias Pattern Match.)
Exact: the entire string must exactly match the 
alias character for character.
Prefix: the string must appear at the beginning 
of the alias.
Suffix: the string must appear at the end of the 
alias. 
Regex: the string is treated as a regular 
expression.
Pattern string
The pattern against which the alias is compared. 
(Applies only if the Type is Alias Pattern Match.)
Target subzone
The subzone to which an endpoint is assigned if 
its address satisfies this rule.
State
Indicates if the rule is enabled or not.
To add a new membership rule using the CLI:
 
To configure membership rules using the CLI:
 
If an endpoint’s IP address or alias does 
not match any of the membership rules, 
it is assigned to the Default Subzone.