Chapter 3 Address and Closed User Group Planning
Planning CUG Configuration Settings
CUG membership is supported as follows:
•An ATM address or ATM address prefix can be a member of up to 100 CUGs.
•CUGs can be provisioned on up to 200 ATM addresses or prefixes.
•The maximum number of CUGs is 65535.
•An ATM address to which a CUG is assigned can use either the NSAP or E.164 address format.
Note The CUG feature is not supported on nodes which are configured with
Planning CUG Configuration Settings
The following sections introduce and provide planning guidelines for the CUG configuration parameters.
Selecting an Interlock Code
A CUG is established by assigning the same
When selecting an interlock code, consider the following guidelines:
•The interlock codes should be managed so that an existing interlock code is not selected for a new CUG.
•Other than being unique to a single CUG, there is no requirement on the contents of the interlock code.
When planning a CUG, consider using the CUG Configuration Worksheet, Table
Selecting an Index
A CUG index is a number that the administrator specifies when making an address or prefix part of a CUG. The CUG index is mapped to the appropriate interlock code within the switch. During CPE configuration, the appropriate CUG index is configured on the CPE to match the index already defined on the node. When the CPE requests a call, it supplies the index, which is used by the switch to identify the appropriate CUG.
When specifying an index, consider the following guidelines:
•Within each switch, the same, unique index number should be used for all CUG assignments that share the same interlock code.
•The interlock code is not used outside of the switch. Once the index number is mapped to the interlock code, the interlock code is used for all network communications.
•The CPE cannot use the index without further configuration.
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