Configuration Guide                                                                   802.1x Configuration 
The following chapters introduce the propriety features of Ruijie’s network products: 
To  make  it  easy  for  broadband  operators  and  to  accommodate  use  in  special  environments,  our  802.1x  has  been 
expanded on the basis of the account (such expansion is completely based on the standard, and has totally compatible 
with IEEE 802.1x). 
Configuring the IP authorization mode 
The 802.1x implemented  by Ruijie  Network  can  force the authenticated  users to  use fixed  IP.  By configuring  the  IP 
authorization mode, the administrator can limit the way the user gets IP address. There are four IP authorization modes: 
DISABLE, DHCP SERVER, RADIUS SERVER and SUPPLICANT. They are detailed below respectively: 
DISABLE mode (default): The device has no limitation for the user IP, and the user only needs to pass the authentication 
to be able to access the network. 
DHCP SERVER mode: The user IP is obtained via specified DHCP SERVER, and only the IP allocated by the specified 
DHCP SERVER is considered legal. For the DHCP mode, it is possible to use DHCP relay option82 to implement a more 
flexible IP allocation policy with the 802.1X. Here is a typical diagram for the plan: 
Figure 0-2 
 
The user initiates IP requests via the DHCP Client. The network device with dhcp relay option82 converges the user 
authority  on  the SAM server  to  construct  the  option82 field and  encapsulate  it in  the  DHCP  request message.  That 
option82 field consists of “vid + permission”. The DHCP Server chooses different allocation policies by using the option82 
field. 
In this mode, it is required to configure the DHCP Relay and the related option82. If the DHCP relay function is enabled 
and  the  option82  policy  is  selected,  see  the  DHCP  Relay  Configuration  Guide  and  Command  References  for  the 
configurations.