2-3 
To do…  Use the command…  Remarks 
Set the accounting-optional 
switch 
accounting optional 
Optional 
By default, the 
accounting-optional switch is 
off. 
Set the messenger function 
messenger time { enable limit 
interval | disable } 
Optional 
By default, the messenger 
function is disabled. 
 
Note that: 
z  On a Switch 4200G, each access user belongs to an ISP domain. You can configure up to 16 ISP 
domains on the switch. When a user logs in, if no ISP domain name is carried in the username, the 
switch assumes that the user belongs to the default ISP domain. 
z  If you have configured to use "." as the delimiter, for a username that contains multiple ".", the first 
"." will be used as the domain delimiter.  
z  If you have configured to use "@" as the delimiter, the "@" must not appear more than once in the 
username. If “.” is the delimiter, the username must not contain any “@”. 
z  If the system does not find any available accounting server or fails to communicate with any 
accounting server when it performs accounting for a user, it does not disconnect the user as long 
as the accounting optional command has been executed, though it cannot perform accounting for 
the user in this case. 
 
 
H3C's CAMS Server is a service management system used to manage networks and ensure network 
and user information security. With the cooperation of other networking devices (such as switches) in a 
network, a CAMS server can implement the AAA functions and right management. 
 
Configuring an AAA Scheme for an ISP Domain 
You can configure either a combined AAA scheme or separate AAA schemes. 
Configuring a combined AAA scheme 
You can use the scheme command to specify an AAA scheme for an ISP domain.  
Follow these steps to configure a combined AAA scheme: 
To do…  Use the command…  Remarks 
Enter system view 
system-view 
— 
Create an ISP domain and 
enter its view, or enter the view 
of an existing ISP domain 
domain isp-name  
Required 
Configure an AAA scheme for 
the ISP domain 
scheme { local | none | radius-scheme 
radius-scheme-name [ local ] | 
hwtacacs-scheme 
hwtacacs-scheme-name [ local ] } 
Required 
By default, an ISP 
domain uses the 
local AAA scheme.