3Com Switch 4200G Configuration Guide

172 CHAPTER 23: AAA&RADIUS CONFIGURATION
The RADIUS protocol takes well scalability. Attribute 26 (Vender-Specific) defined in
this protocol allows a device vendor to extend RADIUS to implement functions that
are not defined in standard RADIUS.
Figure 57 depicts the structure of attribute 26. The Vendor-ID field representing the
code of the vendor occupies four bytes. The first byte is 0, and the other three bytes
are defined in RFC1700. Here, the vendor can encapsulate multiple customized
sub-attributes (containing Type, Length and Value) to obtain extended RADIUS
implementation.
Figure 57 Part of the RADIUS packet containing extended attribute
13 Framed-Compression 35 Login-LAT-Node
14 Login-IP-Host 36 Login-LAT-Group
15 Login-Service 37 Framed-AppleTalk-Link
16 Login-TCP-Port 38 Framed-AppleTalk-Network
17 (unassigned) 39 Framed-AppleTalk-Zone
18 Reply_Message 40-59 (reserved for accounting)
19 Callback-Number 60 CHAP-Challenge
20 Callback-ID 61 NAS-Port-Type
21 (unassigned) 62 Port-Limit
22 Framed-Route 63 Login-LAT-Port
Table 133 RADIUS attributes (Continued)
Value of the
Type field
Attribute type
Value of the
Type field
Attribute type
Vendor-IDType Length
Vendor-ID
Length
(s pecified)
Type
(s pecified)
Specified attribute value……
Vendor-IDType Length
Vendor-ID
Length
(s pecified)
Type
(s pecified)
Specified attribute value……