Cabletron Systems STHI Manual De Usuario
The System Level Screen
Page 5-10
5.3.5
Enable Beacon Recovery
This field allows the user to enable or disable the STHI’s Advanced Beacon
Recovery Process (ABRP).
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.
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.
ABRP is supported only by Cabletron products. To secure
the reliability of ABRP beaconing protection for the entire
network, use only Cabletron Systems devices.
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 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);
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.
problematic ring segment.
Number of Retries
1
Use the Number of Retries field to determine how many times the STHI
will attempt to re-enable an RI or RO port which has been disabled by
ABRP. If the beaconing condition still exists when the port is checked, the
port is not allowed to re-enable.
will attempt to re-enable an RI or RO port which has been disabled by
ABRP. If the beaconing condition still exists when the port is checked, the
port is not allowed to re-enable.
The field accepts values from 000 to 100, and also accepts 999 to indicate
infinite retries. The default number of retries is 4.
infinite retries. The default number of retries is 4.
NOTE