Brocade Communications Systems StoreFabric SN6500B Reference page 498

Brocade fabric os message reference v7.1.0 (53-1002749-01, march 2013)

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<Label>, is below low boundary(High=<High value>, Low=<Low value>). Current value

is <Value> <Unit>.

Message Type

Probable Cause

Indicates that the number of Arbitrated Loop Physical Address (ALPA) cyclic redundancy check (CRC)

errors has fallen below the low boundary. This indicates that errors have been detected in the FC frame.

Invalid CRC messages occur when the number of CRC errors in Fibre Channel frames for specific

source ID (S_ID) and destination ID (D_ID) pairs change. These messages might also be caused by dirty

equipment, temperature fluctuations, and aging equipment. You should set your high boundaries to five-

or six-digit figures, because only large numbers of messages indicate a problem in this area.

No action is required. Respond to this message as is appropriate to the particular policy of the end-user

installation. A low level of invalid CRC errors means that the switch is functioning normally.

<Label>, is above high boundary(High=<High value>, Low=<Low value>). Current value

is <Value> <Unit>.

Message Type

Probable Cause

Indicates that the number of cyclic redundancy check (CRC) errors has risen above the high boundary.

This indicates that errors have been detected in the FC frame. Invalid CRC messages occur when the

number of CRC errors in Fibre Channel frames for specific source ID (S_ID) and destination ID (D_ID)

pairs change. These messages might also be caused by dirty equipment, temperature fluctuations, and

aging equipment. You should set your high boundaries to five- or six-digit figures, because only large

numbers of messages indicate a problem in this area.

You should configure a five- or six-figure high boundary for this area. Only five-figure (or higher) values

for CRC errors indicate problems. Check for a faulty cable or deteriorated small form-factor pluggable

(SFP). Replace the cable or the SFP if necessary. Clean the connectors. Check for damage from heat or

deterioration from age.

Fabric OS Message Reference

53-1002749-01

Fabric os v7.1.0