Cisco Cisco IOS Software Release 12.3(4)T

Access-Accept—Response packet from the RADIUS server notifying the access server that the user is 
authenticated. This packet contains the user profile, which defines the specific AAA functions assigned 
to the user.

Access-Request—Request packet sent to the RADIUS server by the access server requesting 
authentication of the user.

SESM—Subscriber Edge Services Manager. The SESM is part of a Cisco solution that allows 
subscribers of digital subscriber line (DSL), cable, wireless, and dial-up to simultaneously access 
multiple services provided by different Internet service providers, application service providers, and 
corporate access servers.

SSG—Service Selection Gateway. 

VPDN—virtual private dial-up network. A VPDN is a network that extends remote access to a private 
network using a shared infrastructure. VPDNs use Layer 2 tunnel technologies (L2F, L2TP, and PPTP) 
to extend the Layer 2 and higher parts of the network connection from a remote user across an Internet 
service provider (ISP) network to a private network. 

VSA—vendor-specific attribute. An attribute that has been implemented by a particular vendor. It uses 
the attribute Vendor-Specific to encapsulate the resulting attribute-value (AV) pair.

Refer to 

 for terms not included in this glossary.

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