Enterasys Networks MicroMMAC-T manual Specifying Ring Management Functions, Inhibit Active Monitor

The MicroMMAC-T Chassis View

3.Type in the desired management station location, being sure to use the appropriate dotted decimal format.

4.Click on OK. The location will change in the text box, and then at the MicroMMAC-T management station itself. Click on Cancel to close the window.

Specifying Ring Management Functions

You can use the Host Error Report Timer Delay, Inhibit Active Monitor, and Enable Beacon Recovery fields to control the way that the MicroMMAC-T’s management station will handle certain ring management functions:

Host Error Report Timer Delay

The Error Report Timer Delay determines the delay time between the time an error is detected and recorded and the time it is reported.

Inhibit Active Monitor

You can remove the MicroMMAC-T’s management station from active monitor contention by activating the Inhibit Active Monitor field. Checking this box will remove the management station from active monitor contention, which occurs as part of the recovery procedures initiated after certain ring error situations. If you inhibit the active monitor function for a management station which is currently serving as the active monitor, that station will continue as active monitor until the next contention.

Enable Beacon Recovery

If the Automatic Beacon Recovery Process (ABRP) option is enabled, the selected management station will automatically attempt to repair its ring when it detects an unusually high concentration of hard errors that have not been corrected by normal ring recovery procedures. ABRP is a sequential process that is designed to isolate the source of the errors as quickly as possible.

If a frequent occurrence of hard errors is detected, the management station first determines if the problem is internal or external to the hub by turning each ring port off to see if the error condition clears. If the beaconing goes away (because it is external to the hub), the MicroMMAC-T enables the Ring In/Out ports at the interval specified in the Retry Interval field for the number of times specified in the # of Ring Port Retries field to see if the beacon condition on the network has cleared. If the beaconing continues after the specified number of retries, the faulty Ring In/Out ports remain disabled.

If the beaconing continues when the Ring In/Out ports are shut off, then the problem is internal to the hub. The MicroMMAC-T individually bypasses each module to isolate the one with the fault (as evidenced by ring recovery on bypass). When the module with the fault is identified, the module is reinserted, and that module’s ports are turned off one by one until the ring recovers again. The last port turned off is considered the failing port. Once the failing port is

2-16 Managing the Hub