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CHAPTER
5-1
Cisco 10000 Series Router Service Selection Gateway Configuration Guide
OL-4387-02
5
Service Selection Methods
The Cisco 10000 series router supports the following service selection methods:
• PPP Terminated Aggregation, page 5-1
• PTA-Multidomain, page 5-1
• Web Service Selection, page 5-2
This chapter describes the service selection methods.
PPP Terminated Aggregation
PPP terminated aggregation (PTA) is a PPP selection method in which service selection is based on a
structured domain name (for example, username@service.com). PTA terminates the PPP session into a
single routing domain. Users can only access one service and users do not have access to the default
network or SESM.
The PTA-MD exclusion list allows you to create a set of domains that you want to exclude from
SSG processing. When a PPP user attempts to establish a PPP session using a domain that is included in
the exclusion list, the traffic is treated as non-SSG traffic and is processed by Cisco IOS software. The
system does not apply SSG features and processing to the traffic.
PTA-Multidomain
PTA-Multidomain (PTA-MD) is a PPP selection method in which service selection is based on a
structured domain name (for example, [email protected]). PTA-MD terminates the PPP sessions
into multiple IP routing domains. SSG features and processing are applied to the user traffic and users
can access one or more services at a time. PTA-MD service selection supports a wholesale VPN model
where each domain is isolated from the other and has the capability to support overlapping IP addresses.
The Cisco 10000 series router implements PTA-MD service selection in the following way:
• The access provider terminates the user PPP sessions and logically associates each session with a
particular service.
• Network side interfaces are associated with a service. SSG binds the user session and its service to
the appropriate network side interface.
• SSG binds the network side interface associated with a service to a virtual routing and forwarding (VRF)
instance. All users who subscribe to that service are also bound to that same VRF. Packets to and from
the user and to and from the network side interface are routed within the same VRF.
- Text Part Number: OL-4387-02 1
- CONTENTS 3
- 6 Service Connection 6-1 4
- Contents 5
- 9 Interface Configuration 9-1 6
- 10 SSG TCP Redirect 10-1 6
- Document Conventions 10
- Related Documentation 11
- Obtaining Documentation 11
- Documentation Feedback 12
- TAC Case Priority Definitions 13
- Cisco TAC Website 13
- Opening a TAC Case 13
- About This Guide 14
- Service Selection Gateway 15
- Default Network 17
- Access Protocols 17
- Supported SSG Features 18
- SSG Restrictions 18
- SSG Prerequisites 20
- SSG Architecture Model 20
- Scalability and Performance 23
- Limitations and Restrictions 24
- SSG Logon and Logoff 25
- SSG Autologoff 26
- SSG Prepaid Idle Timeout 27
- Service Authorization 28
- Service Reauthorization 28
- Example 3-4 SSG TCP Redirect 29
- SSG Session and Idle Timeout 30
- Authentication and Accounting 31
- RADIUS Accounting Records 32
- Service Selection Methods 35
- Web Service Selection 36
- SESM and SSG Performance 37
- Service Connection 39
- SSG AutoDomain 40
- Example 6-1 SSG AutoDomain 41
- SSG Prepaid 42
- SSG Open Garden 43
- SSG Port-Bundle Host Key 44
- Exclude Networks 46
- Service Profiles 49
- Cached Service Profiles 52
- SSG Hierarchical Policing 55
- Interface Configuration 59
- Access Side Interfaces 60
- Network Side Interfaces 61
- SSG TCP Redirect 63
- Initial Captivation 65
- Configuring SSG TCP Redirect 68
- Miscellaneous SSG Features 71
- Packet Filtering 73
- SSG Unconfig 75
- Configuration of SSG Unconfig 76
- Service Translation 77
- Service Definitions 80
- Internal Network Sets 80
- Services-to-Sets Conversion 80
- Expansion of Service IDs 81
- Network Sets: 82
- Troubleshooting RADIUS 84
- Per-Service Statistics 84
- SSG Configuration Example 87
- SSG Implementation Notes 93
- GLOSSARY 97
- Glossary 100
- OL-4387-02 100
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