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C3 Tx discards and FRAME LOSS on Brocade switch

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Category:
fas-systems
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brocade
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Applies to

Brocade Switches

Issue

  • Switch port showing  lot of C3 Tx discards under errdump.

         frames      enc    crc    crc    too    too    bad    enc   disc   link   loss   loss   frjt   fbsy  c3timeout    pcs    uncor
      tx     rx      in    err    g_eof  shrt   long   eof     out   c3    fail    sync   sig                  tx    rx     err    err
 352: 40.0m 183.4m   0      0      0      0      0      0      0     639      0      0      0      0      0    605      0      0      0

 

  • Frame loss events observed under errdump along with the above C3 Tx discards:
2022/02/08-11:30:43, [MAPS-1001], 2143, SLOT 1 | FID 128, CRITICAL, CDVL_X, slot11 port32, F-Port 11/32, Condition=ALL_OTHER_F_PORTS(C3TXTO/min>3), Current Value:[C3TXTO, 20 Timeouts], RuleName=defALL_OTHER_F_PORTSC3TXTO_3, Dashboard Category=Port Health.
2022/02/08-11:30:43, [MAPS-1001], 2144, SLOT 1 | FID 128, CRITICAL, CDVL_X, slot11 port32, F-Port 11/32, Condition=ALL_PORTS(DEV_LATENCY_IMPACT==IO_FRAME_LOSS), Current Value:[DEV_LATENCY_IMPACT, IO_FRAME_LOSS, (20 C3TX Timeouts) ], RuleName=defALL_PORTS_IO_FRAME_LOSS_UNQUAR, Dashboard Category=Fabric Performance Impact.
2022/02/08-11:31:43, [MAPS-1001], 2145, SLOT 1 | FID 128, CRITICAL, CDVL_X, slot11 port32, F-Port 11/32, Condition=ALL_OTHER_F_PORTS(C3TXTO/min>3), Current Value:[C3TXTO, 585 Timeouts], RuleName=defALL_OTHER_F_PORTSC3TXTO_3, Dashboard Category=Port Health.
2022/02/08-11:32:43, [MAPS-1004], 2146, SLOT 1 | FID 128, INFO, CDVL_X, slot11 port32, F-Port 11/32, Condition=ALL_PORTS(DEV_LATENCY_IMPACT==IO_LATENCY_CLEAR), Current Value:[DEV_LATENCY_IMPACT, IO_LATENCY_CLEAR], RuleName=defALL_PORTS_IO_LATENCY_CLEAR, Dashboard Category=Fabric Performance Impact

 

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