User's Manual

Configuration Guide of XGS-5240-Series
52-1
Chapter 52 RADIUS Configuration
52.1 Introduction to RADIUS
52.1.1
AAA and RADIUS Introduction
AAA is short for Authentication, Authorization and Accounting, it provide a consiste
ncy framework for the network management safely. According to the three functions of
Authentication, Authorization, Accounting, the framework can meet the access control for
the security network: which one can visit the network device, which access-level the u
ser can have and the accounting for the network resource.
RADIUS (Remote Authentication Dial in User Service), is a kind of distributed and
client/server protocol for information exchange. The RADIUS client is usually used on n
etwork appliance to implement AAA in cooperation with 802.1x protocol. The RADIUS s
erver maintains the database for AAA, and communicates with the RADIUS client throu
gh RADIUS protocol. The RADIUS protocol is the most common used protocol in the A
AA framework.
52.1.2 Message structure for RADIUS
The RADIUS protocol uses UDP to deliver protocol packets. The packet format is
shown as below.
Fig 8-1 Message structure for RADIUS
Code field(1octets): is the type of the RADIUS packet. Available value for the Code fiel