Enterasys NetSight Element Manager, Руководство пользователя

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The MicroMMAC-T Chassis View
2-16 Managing the Hub
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