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Cisco Bug: CSCur87487 - Ge4 fcflow gives inaccurate bytes values

Last Modified

Feb 04, 2017

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases

6.2(3)

Description (partial)

Symptom:
fcflow running  over Gen4 linecards will give incorrect bytes count. the bytes count in Gen4 fcflow is almost 4 times less than the interface counters and Gen3 fcflow bytes count:

ybslsan02# show interface fc7/14 | grep "frames [io]"
      514928 frames input, 1068538336 bytes --->
      519482 frames output, 1067483804 bytes

ybslsan02# show fcflow stats module 7 index 1
       Idx       VSAN        DID        SID       Mask     frames      bytes
---------- ---------- ---------- ---------- ---------- ---------- ----------
         1        102   0x178880   0x173300   0xffffff     514939  266108925

tested on 5.2.8 and 6.2.3

Conditions:
Gen4 line cards : DS-X9248-256K9  and DS-X9232-256K9
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