Configuring SAID for BRAS Services
User access services involve a wide range of users and peripheral devices in large quantities. If a fault occurs, manual fault diagnosis is time-consuming and cannot easily locate the fault point. The System of Active Immunization and Diagnosis (SAID) can therefore be used to implement self-diagnosis and self-healing of service nodes for user access.
Usage Scenario
The SAID can identify typical faults and automatically diagnose and rectify the faults. If a large number of users fail to go online, the SAID automatically performs comprehensive fault diagnosis and collects diagnostic data (including user login/logout failure causes and the number of users counted by board). If self-healing conditions are met, the SAID initiates a master/slave main control board switchover or restart the faulty board to rectify the fault.
In addition, the SAID can collect statistics about the number of users and traffic based on interfaces. It automatically performs fault diagnosis at a specified detection interval. If fault diagnosis conditions are met, the SAID records log information for fault tracing, facilitating fault diagnosis and prevention.
Pre-configuration Tasks
None
Procedure
- Run system-view
The system view is displayed.
- Run aaa
The AAA view is displayed.
- Run undo set said-node all disable
All SAID nodes are enabled.
To check whether a SAID node is enabled, run the display said-node brief command. The SAID node is enabled if OPERATE is displayed as Enable and disabled if OPERATE is displayed as Disable.
- Run aaa-said check-rule rule1 online-fail-num increase increase-num
A login failure increment within 10 minutes is set to trigger fault detection on SAID nodes.
- Run aaa-said check-rule online-fail-reason exclude fail-code fail-code
Login failures with a specified cause code are excluded from being detected or diagnosed on SAID nodes.
- Run aaa-said diag-rule online-fail-num increase increase-num user-num reduce user-num online-success-ratio below succ-rate
The user login failure increment within 10 minutes, number of online users reduced, and login success ratio reduced that can trigger fault diagnosis on SAID nodes are set.
- Run aaa-said recover interval interval-time
An interval between two SAID recovery operations is set.
- Run aaa-said enable
The SAID function is enabled.
To check whether the SAID function is enabled, run the display aaa configuration command. The function is enabled if Said switch is displayed as enable and disabled if Said switch is displayed as disable.
- Run aaa-said check-rule user-number reduce-ratio reduce-ratio
A user reduction rate threshold over which fault diagnosis and self-healing are triggered on SAID nodes is set.
- Run aaa-said check-rule flow-speed reduce-ratio reduce-ratio
A traffic reduction rate threshold over which fault diagnosis and self-healing are triggered on SAID nodes is set.
- Run commit
The configuration is committed.
Verifying the Configuration
Run the display aaa configuration command to check the configuration of the SAID function.