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Is the failure symptom that no data traffic can get from one
side of the bridge to the other, or is data intermittently getting corrupted
when passing through the bridge?
 Go
to page 7.1.
Is the failure symptom that only partial data traffic can pass across
the bridge?
Go
to page 7.2.
Is the failure symptom that an overloaded bandwidth condition is
present on a certain ring?
Go
to page 7.3.
 This procedure is generic
as to the bridge manufacturer. For some of the troubleshooting steps men
tioned on this page, you should also reference the bridge manufacturer's
documentation for any special predefined methods for checking bridge configuration
and for bridge testing.
7.1 No data
traffic can get from one side of the bridge to the other, or data is intermittently
getting corrupted when passing through the bridge.
Thoroughly check the software and hardware configuration of the bridge.
Are any incorrect configuration parameters present in the bridge?
Take the necessary action to resolve
the problem and retest the bridge for proper operation. If the failure
symptom is gone, record the problem in the network maintenance and service
log. If the problem still exists after retesting, go to the next step .
 Attempt to run bridge diagnostics.
Did running the diagnostics produce any errors that identify a bridge
failure?
Take the necessary action to resolve
the problem and retest the bridge for proper operation. If the failure
symptom is gone, record the problem in the network maintenance and service
log. If the problem still exists after retesting, go to the next step .
A problem may still exist with
the bridge, but to get more conclusive fault-isolation data, go to page
15 .
If after using this procedure
you cannot conclusively locate the problem and you continue to find failure
symptoms that point to a bridge problem, reference the manufacturer's instructions.
7.2 Only partial
data traffic can pass across the bridge.
Thoroughly check the software and hardware configuration of the bridge.
Are any incorrect configuration parameters in the bridge?
Take the necessary action to resolve
the problem and retest the bridge for proper operation. If the failure
symptom is gone, record the problem in the network maintenance and service
log. If the problem still exists after retesting, go to the next step .
Check the ring for source-routing
problems with certain ring stations. Thoroughly examine the Routing Information
field of the frames that are not being passed through the bridge.
Keep in mind that pa rticular ring stations can have a software application
configuration problem in relation to the source-routing field that they
are directly transmitting.
Did examining the ring for source-routing problems locate any specific
problems with a certain ring station's Routing Information field?
Take the necessary action to resolve
the source-routing problems with the respective ring station's source-routing
parameters; then retest the bridge for proper operation. If the failure
symptom is gone, record the problem in the network maintenance and service
log. If the problem still exists after retesting, go to the next step .
Attempt to gather more conclusive
fault-isolation data by thoroughly examining the Routing Information field
from all the frames not being passed through the bridge. Go to page
15.
If after using this procedure
you cannot conclusively locate the problem and you continue to find failure
symptoms that point to a bridge problem, reference the manufacturer's instructions.
7.3 An overloaded
bandwidth condition is present on a certain ring.
Thoroughly check the bridge for any incorrect configuration parameters
that can control the amount of traffic to be forwarded to another ring.
Are any incorrect configuration parameters present in the bridge?
Take the necessary action to resolve
the problem and retest the bridge for proper operation. If the failure
symptom is gone, record the problem in the network maintenance and service
log. If the problem still exists after retesting, go to the next step .
Check the source ring for source-routing
problems with certain ring stations. Thoroughly examine the Routing Information
field of the frames possibly causing bandwidth problems in the destinati
on ring.
Keep in mind that a particular
ring station can have a software application configuration problem in relation
to the source-routing field that it is directly transmitting.
Did examining the ring for source-routing problems locate any specific
problems with a certain ring station's Routing Information field?
Take the necessary action to resolve
the source-routing problems with the respective ring station's source-routing
parameters, then retest the bridge for proper operation. If the failure
symptom is gone, record the problem in the network maintenance and service
log. If the problem still exists after retesting, go to the next step .
Attempt
to gather more conclusive fault-isolation data by going to page 15.
Thoroughly examine the Routing
Information field from all the frames for incorrect addressing information
for source routing that may be causing an overhead problem from one ring
to another. Look closely at the percentage of frames being forwarded that
are overloading the destination ring with traffic.
If after using this procedure
you cannot conclusively locate the problem and continue to find failure
symptoms that point to a bridge problem, reference the manufacturer's instructions.
November 15,1996
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