Cisco Systems Network Router Planning CUG Configuration Settings, Selecting an Interlock Code

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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 right-justified E.164 addresses using the cnfe164justify command.

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 24-byte interlock code to two or more prefixes or AESAs on a PNNI network. All prefixes and addresses that share the same interlock code are considered part of the same CUG and can establish connections amongst themselves, unless these connections are blocked by configuration options.

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 3-6, which appears at the end of this chapter. Each CUG uses only one interlock code, so place that code in the first row of the worksheet.

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.

 

 

Cisco PNNI Network Planning Guide for MGX and SES Products, Release 5

 

 

 

 

 

 

Part Number OL-3847-01 Rev. D0, April, 2004

 

 

3-15

 

 

 

 

 

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Contents Text Part Number OL-3847-01 Rev. D0 Corporate HeadquartersCopyright 2003, Cisco Systems, Inc All rights reserved Iii N T E N T SCompatible Standards Worksheets Part Number OL-3847-01 Rev. D0, April Vii G U R E SViii B L E S Part Number OL-3847-01 Rev. D0, April Organization ObjectivesAudience Xii ConventionsDocumentation Notes for the April 2004 Product Releases DocumentationRelated Documentation XiiiXiv Technical Manual Order of UseTerms Technical Manual Titles and DescriptionsXvi Xvii Xviii Xix Reference Guides Xxi Xxii Document Title DescriptionXxiii Xxiv Xxv Xxvi Cisco.com Obtaining DocumentationOrdering Documentation XxviiXxviii Changes to This DocumentChapter Changes Documentation Feedback Obtaining Technical AssistanceCisco TAC Website Opening a TAC CaseXxx Obtaining Additional Publications and InformationTAC Case Priority Definitions Xxxi Xxxii Pnni Network Database Introduction to PnniSingle Peer Group Topology Example Single Peer Group Topology Hierarchical Pnni Network TopologyPeer group Ppeer Simple Node Representation Peer Group LeadersSimple Node Representation Complex Node RepresentationHierarchical Pnni Network Benefits Pnni Internetworking with AiniBorder Nodes Example Pnni Internetworking with Aini Topology Pnni Internetworking with IispPart Number OL-3847-01 Rev. D0, April Compatible Standards SpecificationsCapabilities PXM45PXM1E PXM45/BSES Capabilities SESConnection Type Switch Connections CWM Endpoints Connection Limit AdjustmentsSVC DAX SpvcPhysical Network Planning Install Redundant Hardware in SwitchesParallel Links Between Adjacent Switches Multiple Links Between Adjacent Peer Groups Planning Guidelines for Individual Peer GroupsMultiple Links to an External Network Multiple Paths Between Network NodesPlanning Guidelines for Border Nodes Planning Guidelines for Hierarchical NetworksPlanning Guidelines for Peer Group Leaders Part Number OL-3847-01 Rev. D0, April Address Planning Overview Address and Closed User Group PlanningPnni Addressing Example Selecting an ATM Address Format Planning Address Configuration SettingsESI SEL IDP DSP Supported Address FormatsGuidelines for Selecting an Address Format ATM Field Description Default ValuesAddress Registration Authorities Selecting a Pnni LevelCategory Type Authorities DCC4shows an example topology of a Pnni MPG WAN Part Number OL-3847-01 Rev. D0, April Level Peer Group ID Portion of ATM Address Bytes LengthSelecting the Pnni Peer Group ID Default Peer Group ID20-byte Node Address Selecting the ATM AddressPlanning Address Prefixes for Aini and Iisp Links Selecting the Ilmi Address PrefixSelecting the Spvc Address Prefix Additional Guidelines for Creating an Address Plan Selecting Static Addresses for UNI PortsClosed User Group Example Closed User Group OverviewSelecting an Index Planning CUG Configuration SettingsSelecting an Interlock Code Selecting CPE Addresses Selecting Internal CUG Access OptionsSpecifying a Preferential CUG Selecting External CUG Access OptionsWorksheets Selecting a Default CUG AddressCUG Part Number OL-3847-01 Rev. D0, April Link and Route Metrics Administrative WeightHow MGX and SES Nodes Select Routes Available Cell Rate Cell Transfer DelayCell Delay Variation Shortest Path Tables Shortest Path Table RoutingMaximum Cell Rate Service Class Acronym Definition Guidelines Class of Service TablesCTD CDV Traffic MetricHow SPVCs and SPVPs use the SPTs How SVCs and SVPs use the SPTsLoad Balancing for SPT and On-Demand Routing How MGX and SES Nodes Select LinksOn-Demand Routing Service Additional Routing Features in MGX and SES NodesPreferred Routing CLR0+12Grooming Priority RoutingPriority Bumping Soft ReroutingBlocking Pass-Through Connections Nodal Point-to-Multipoint Branch RestrictionAXSM/B AXSM/AAXSM-E AXSM-XGFarthest Node Branching Part Number OL-3847-01 Rev. D0, April Aesa ABRAini Ansi APSCBR P2MPCTD IN-2CWM CUGDIN IN-3IN-4 Pnni PGLMGX SES IN-5IN-6 UNI UBRTAC IN-7IN-8
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