Cisco Systems OL-4387-02 manual GL-5

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Glossary

T

TCP

Connection-oriented transport layer protocol that provides reliable full-duplex data transmission. TCP

 

is part of the TCP/IP protocol stack.

turbo access control A function of the PXF pipeline that determines whether a packet matches a list in a fixed, predictable

listperiod of time, usually regardless of the number of entries in a list. Turbo ACLs enable more expedient packet classification and access checks when the router is evaluating ACLs. The Turbo ACL feature compiles the ACLs into a set of lookup tables, while maintaining the first match requirements. Packet headers are used to access these tables in a small, fixed number of lookups, independently of the existing number of ACL entries.

V

VC

Virtual Circuit. Also referred to as Virtual Channel. Used in ATM applications. A link that seems and

 

behaves like a dedicated point-to-point line or a system that delivers packets in sequence, as happens

 

on an actual point-to-point network. In reality, the data is delivered across a network via the most

 

appropriate route. The sending and receiving devices do not have to be aware of the options and the

 

route is chosen only when a message is sent. There is no pre-arrangement, so each virtual circuit exists

 

only for the duration of that one transmission.

VCI

Virtual channel identifier. A 16-bit field in the header of an ATM cell. The VCI, together with the VPI,

 

is used to identify the next destination of a cell as it passes through a series of ATM switches on its way

 

to its destination. ATM switches use the VPI/VCI fields to identify the next network VCL that a cell

 

needs to transmit on its way to its final destination. The function of the VCI is similar to that of the

 

DLCI in Frame Relay.

VLAN

VPI

Virtual LAN. Group of devices on one or more LANs that are configured (using management software) so that they can communicate as if they were attached to the same wire, when in fact they are located on a number of different LAN segments. Because VLANs are based on logical instead of physical connections, they are extremely flexible.

Virtual path identifier. An 8-bit field in the header of an ATM cell. The VPI, together with the VCI, is used to identify the next destination of a cell as it passes through a series of ATM switches on its way to its destination. ATM switches use the VPI/VCI fields to identify the next VCL that a cell needs to transmit on its way to its final destination. The function of the VPI is similar to that of the DLCI in Frame Relay.

VRF

Virtual routing and forwarding instance. A VRF consists of an IP routing table, a derived forwarding

 

table, a set of interfaces that use the forwarding table, and a set of rules and routing protocols that

 

determine what goes into the forwarding table. In general, a VRF includes the routing information that

 

defines a customer VPN site that is attached to a PE router.

VSA

Vendor-Specific Attribute. An attribute that has been implemented by a particular vendor. It uses the

 

attribute Vendor-Specific to encapsulate the resulting AV pair: essentially, Vendor-Specific =

 

protocol:attribute = value.

Cisco 10000 Series Router Service Selection Gateway Configuration Guide

 

OL-4387-02

GL-5

 

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Contents Corporate Headquarters Copyright 2004, Cisco Systems, Inc All rights reserved Iii N T E N T SConfiguration Example for SSG AutoDomain Configuration Example for SSG Open Garden Configuration of VPI/VCI Static Binding to a Service Profile Vii SSG UnconfigViii Document Organization About This GuideAudience Document Conventions Cisco.com Related DocumentationObtaining Documentation Obtaining Technical Assistance Documentation FeedbackDocumentation CD-ROM Ordering DocumentationOpening a TAC Case Cisco TAC WebsiteTAC Case Priority Definitions XiiiXiv Obtaining Additional Publications and InformationService Selection Gateway Service Selection Gateway OverviewSSG Topology Example Access Protocols Default NetworkSSG Restrictions Supported SSG FeaturesService Selection Gateway Overview SSG Restrictions SSG Architecture Model SSG PrerequisitesService Selection Gateway Overview SSG Architecture Model OL-4387-02 Limitations and Restrictions Scalability and PerformanceScalability and Performance Limitations and Restrictions Prerequisites for Single Host Logon SSG Logon and LogoffSingle Host Logon Restrictions for SSG Autologoff Configuration of SSG AutologoffSSG Autologoff Configuration Example for SSG Autologoff SSG Prepaid Idle TimeoutExample 3-1 SSG Autologoff Using ARP Ping Example 3-2 SSG Autologoff Using Icmp PingService Reauthorization Service AuthorizationPrerequisites for SSG Prepaid Idle Timeout Restrictions for SSG Prepaid Idle TimeoutConfiguration of SSG Prepaid Idle Timeout Configuration Example for SSG Prepaid Idle TimeoutExample 3-5 SSG Service-Specific TCP Redirect SSG Session and Idle TimeoutExample 3-7 SSG Threshold Volume Example 3-6 SSG Threshold TimeSSG Full Username Radius Attribute Authentication and AccountingRestrictions for SSG Full Username Radius Attribute Example 4-1 Radius Freeware Format ExampleRadius Accounting Records Account Login and LogoutExample 4-3 Radius Accounting-Start Record Example 4-4 Radius Accounting-Stop RecordService Connection and Termination Authentication and Accounting Radius Accounting Records PTA-Multidomain Service Selection MethodsPPP Terminated Aggregation Restrictions for PTA-MD Web Service SelectionSesm and SSG Performance OL-4387-02 SSG AutoDomain Service ConnectionRestrictions for SSG AutoDomain Configuration of SSG AutoDomainConfiguration Example for SSG AutoDomain Example 6-3 AutoDomain Exclude File Format Example 6-1 SSG AutoDomainExample 6-2 AutoDomain Exclude Profile SSG VSA Format Restrictions for SSG Prepaid Configuration of SSG PrepaidSSG Prepaid SSG Open Garden Configuration Example for SSG PrepaidConfiguration Example for SSG Open Garden Configuration of SSG Open GardenSSG Port-Bundle Host Key Restrictions for SSG Open GardenRestrictions for SSG Port-Bundle Host Key Configuration of SSG Port-Bundle Host Key Mutually Exclusive Service SelectionExclude Networks Prerequisites for SSG Port-Bundle Host KeyConfiguration of Mutually Exclusive Service Selection OL-4387-02 Downstream Access Control List Service ProfilesService Authentication Type Upstream Access Control ListDomain Name Full UsernameService Description Service-Defined CookieService Mode Service Next-Hop GatewayType of Service Cached Service ProfilesService Profile Example Example 7-1 Service ProfileConfiguration of Cached Service Profiles OL-4387-02 SSG Hierarchical Policing Token Bucket Scheme SSG Hierarchical PolicingSSG Hierarchical Policing Overview Restrictions for SSG Hierarchical Policing SSG Hierarchical Policing ConfigurationExample 8-2 Enabling Per-Session Policing on a Router Configuration Examples for SSG Hierarchical PolicingOL-4387-02 Transparent Passthrough Interface ConfigurationFor example Access Side InterfacesMulticast Protocols on SSG Interfaces Configuration of Transparent PassthroughNetwork Side Interfaces Restrictions of Transparent PassthroughConfiguration of Multicast Protocols on SSG Interfaces 10-1 Redirection for Unauthenticated UsersSSG TCP Redirect 10-2 Redirection for Unauthorized Services10-3 Initial CaptivationRestrictions for SSG TCP Redirect Configuration of SSG TCP RedirectPrerequisites for SSG TCP Redirect 10-4Example 10-2 Limiting Redirected TCP Sessions 10-5Example 10-1 Binding a Server Group to a Port 10-6 Configuring SSG TCP Redirect10-7 Configuration Examples for SSG TCP RedirectExample 10-3 Defining a Captive Portal Server Group Example 10-4 Defining Network ListsExample 10-5 Defining Port Lists 10-811-1 Miscellaneous SSG FeaturesVPI/VCI Static Binding to a Service Profile Configuration of Radius Virtual Circuit Logging AAA Server Group Support for Proxy ServicesRadius Virtual Circuit Logging 11-211-3 Packet FilteringUpstream Access Control List-inacl Downstream Access Control List-outaclRestrictions for Packet Filtering 11-4Configuration of Packet Filtering SSG UnconfigConfiguration Example for Packet Filtering Restrictions for SSG UnconfigConfiguration of SSG Unconfig Prerequisites for SSG UnconfigConfiguration Examples for SSG Unconfig 11-611-7 SSG Enhancements for Overlapping ServicesService Translation 11-8 11-9 Restrictions for Service Translation11-10 Configuration of Service Translation11-11 Expansion of Service IDs11-12 Network Sets12-1 Monitoring and Maintaining SSGPer-Service Statistics Troubleshooting RadiusRestrictions for Per-Service Statistics 12-212-3 Monitoring the Parallel Express Forwarding Engine12-4 Figure A-1 SSG Example Topology SSG Configuration ExampleUsername cisco password 0 cisco clock timezone PST Example A-1 Cisco 10000 Router SSG ConfigurationSsg accounting interval 300 ssg profile-cache Full-duplex Peer default ip address pool SSG-POOL Exec-timeout 0 0 password lab SSG Implementation Notes SSG Feature Implementation NotesMpls Also see the Restrictions for SSG TCP Redirect section on OL-4387-02 GL-1 O S S a R YGL-2 GL-3 GL-4 GL-5 GL-6 IN-1 D EIN-2 DSL G-1IN-3 ISP G-2 L2TPIN-4 RadiusIN-5 Reauthorizing prepaidIN-6 TCPIN-7 VRF G-5 VSAIN-8
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