The System Level Screen
5.3.5Enable Beacon Recovery
This field allows the user to enable or disable the STHI’s Advanced Beacon Recovery Process (ABRP).
Beaconing is part of a standard IEEE 802.5 Token Ring process by which a Token Ring LAN attempts to recover from cable or hardware problems by automatically locating and bypassing the fault, thereby restoring network communications without operator intervention. Networks that rely upon the IEEE standard beaconing process are disabled when beaconing fails. Cabletron’s ABRP protects against such network stoppages.
NOTE |
ABRP is supported only by Cabletron products. To secure the reliability of ABRP beaconing protection for the entire network, use only Cabletron Systems devices.
If beacon recovery is enabled, ABRP is automatically invoked whenever the STHI detects a beaconing condition on the ring. It is often able to correct the problem before the standard IEEE process even begins. Once ABRP locates the problem and corrects it, the STHI generates traps to provide the network’s designated remote management station with the following information regarding the incident:
•the beaconing device’s address;
•the address of the beaconing device’s Nearest Active Upstream Neighbor (NAUN);
•the beacon type;
•the duration of the beaconing condition;
•and the port(s) and/or modules left in bypass to partition the problematic ring segment.
Number of Retries | 1 |
Use the Number of Retries field to determine how many times the STHI will attempt to
The field accepts values from 000 to 100, and also accepts 999 to indicate infinite retries. The default number of retries is 4.
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