Brocade Switch Reporting Error Messages: [C2-1012], CHASSIS, WARNING, Brocade5300, Link Timeout on internal port

Asset ID:	1-72-2029883.1
Update Date:	2015-07-10
Keywords:

Solution Type Problem Resolution Sure

Solution 2029883.1 : Brocade Switch Reporting Error Messages: [C2-1012], CHASSIS, WARNING, Brocade5300, Link Timeout on internal port

Applies to:

Brocade 5300 Switch - Version Not Applicable to Not Applicable [Release N/A]
Information in this document applies to any platform.

Symptoms

Brocade 5300

Switch reporting SO,P-1(224): Link Timeout on internal port ftx=34142168 tov=2000 (>1000) vc_no=15 crd(s)lost=4 complete_loss:0. Switch has been generating these messages for a number of days.

2015/06/12-08:22:51, [C2-1012], 918332, CHASSIS, WARNING, Brocade5300, S0,P-1(224): Link Timeout on internal port ftx=32445847 tov=2000 (>1000) vc_no=15 crd(s)lost=4 complete_loss:0.

No impact to service has been observed.

Cause

From errdump

2015/06/12-08:22:51, [C2-1012], 918332, CHASSIS, WARNING, Brocade5300, S0,P-1(224): Link Timeout on internal port ftx=32445847 tov=2000 (>1000) vc_no=15 crd(s)lost=4 complete_loss:0.
2015/06/12-08:27:52, [C2-1012], 918333, CHASSIS, WARNING, Brocade5300, S0,P-1(224): Link Timeout on internal port ftx=33497299 tov=2000 (>1000) vc_no=15 crd(s)lost=4 complete_loss:0.
2015/06/12-08:33:06, [C2-1012], 918334, CHASSIS, WARNING, Brocade5300, S0,P-1(224): Link Timeout on internal port ftx=33705827 tov=2000 (>1000) vc_no=15 crd(s)lost=4 complete_loss:0.
2015/06/12-08:38:07, [C2-1012], 918335, CHASSIS, WARNING, Brocade5300, S0,P-1(224): Link Timeout on internal port ftx=33718089 tov=2000 (>1000) vc_no=15 crd(s)lost=4 complete_loss:0.

These events mean that a frame has been discarded in the internal backend connections of the switch.

S,P(): Link Timeout on internal port ftx= tov= (>) vc_no= crd(s)lost= complete_loss:.

S0, P-1 (224) = Slot 0 , Port 1, backend port 224

firmwareshow -v :
Appl Primary/Secondary Versions
------------------------------------------
FOS v7.1.1a
v7.1.1a

Index Port Address Media Speed State Proto
==================================================
0 0 6e0000 id N4 Online FC F-Port 50:01:xx:xx:xx:xx:xx:xx
1 1 6e0100 id N8 No_Light FC <<<<<<<<<<<<

FRU# FRU Type ID Status

-----------------------------------
0 SW BLADE 53 ON p=0000000 r=20000 h=14 <<<<<<<<<<
1 PWR SUPP ON p=0000000 r=20000 h=00
2 PWR SUPP ON p=0000000 r=20000 h=00
1 BLOWER ON p=0000000 r=20000 h=00
2 BLOWER ON p=0000000 r=20000 h=00
3 BLOWER ON p=0000000 r=20000 h=00
1 WWN CARD ON p=0000000 r=20000 h=00

Probable Cause Indicates that above normal errors are observed in the hardware that may or may not impact the data traffic.

These events mean that a frame has been discarded in the internal backend connections of the switch.

Solution

The command "bottleneckmon --cfgcredittools -intport -recover onLrOnly" fix the problem.

The mission of command bottleneckmon --cfgcredittools -intport -recover onLrOnly is to reset the backend ports that is reporting these events

(a better description is available in Brocade documentation Fabric OS Administrator’s Guide).

Leaving this command active is harmless, otherwise if there is a backend port stuck and discarding frames, could lead to a performance degradation.

References

<NOTE:1449860.2> - Information Center: Brocade 5300 Switch
<NOTE:166650.1> - Working Effectively With Oracle Support - Best Practices

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