Rule- defALL_TARGET_PORTSRX_90 triggered on Brocade switch port

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Category:: fabric-interconnect-and-management-switches

Specialty:: brocade

Last Updated:

Applies to

Brocade switch

Issue

RX utilization reaching high and Rule-defALL_TARGET_PORTSRX_90 triggered in errdump.
Sfpshow output reports both Tx and Rx power in the recommended range.

============= Slot 3/Port 27: ============= RX Power: -0.8 dBm (833.4uW) TX Power: -0.6 dBm (877.8 uW)

Porterrshow does not report any errors as the stats were cleared before uploading the logs.

/fabos/cliexec/porterrshow : 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 139: 3.6g 52.7g 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

phy_stats_clear_ts 03-04-2024 IST Mon 05:02:54 Timestamp of phy_port stats clear lgc_stats_clear_ts 03-04-2024 IST Mon 05:02:54 Timestamp of lgc_port stats clear fec_corrected_rate 0 FEC Corrected blocks per second

• Errdump log reports Rule- defALL_TARGET_PORTSRX_90 being triggered.

2024/03/04-11:21:48 (IST), [MAPS-1003], 58286, SLOT 1 | FID 128 | PORT 3/27, WARNING, Switch, slot3 port27, F-Port 3/27, Condition=ALL_TARGET_PORTS(RX/hour>90), Current Value:[RX, 96.12 %], RuleName=defALL_TARGET_PORTSRX_90, Dashboard Category=Fabric Performance Impact, Quiet Time=None. 2024/03/04-12:21:48 (IST), [MAPS-1003], 58335, SLOT 1 | FID 128 | PORT 3/27, WARNING, Switch, slot3 port27, F-Port 3/27, Condition=ALL_TARGET_PORTS(RX/hour>90), Current Value:[RX, 94.56 %], RuleName=defALL_TARGET_PORTSRX_90, Dashboard Category=Fabric Performance Impact, Quiet Time=None.

• MAPS (Fabric Performance Impact) output, reports the utilization on the affected port very high (>90%) .

3.2 Rules Affecting Health: ===========================

Category(Violation Count)|RepeatCount|Rule Name |Execution Time |Object |Triggered Value(Units)| -----------------------------------------------------------------------------------------------------------------------------

|1 |defALL_TARGET_PORTSRX_90 |03/04/24 12:21:48|F-Port 3/27 |94.56 % | |1 |defALL_TARGET_PORTSRX_90 |03/04/24 11:21:48|F-Port 3/27 |96.12 % | |1 |defALL_TARGET_PORTSRX_90 |03/04/24 10:21:48|F-Port 3/27 |90.02 % |

|10 |defALL_TARGET_PORTSRX_90 |03/02/24 19:25:46|F-Port 3/27 |93.11 % | | | | |F-Port 3/27 |96.33 % | | | | |F-Port 3/27 |96.04 % | | | | |F-Port 3/27 |96.66 % | | | | |F-Port 3/27 |94.65 % | |8 |defALL_TARGET_PORTSRX_90 |03/01/24 18:36:46|F-Port 3/27 |94.07 % | | | | |F-Port 3/27 |94.23 % | | | | |F-Port 3/27 |94.46 % | | | | |F-Port 3/27 |90.27 % | | | | |F-Port 3/27 |91.51 % |

|4 |defALL_TARGET_PORTSRX_90 |02/29/24 22:14:44|F-Port 3/27 |90.04 % | | | | |F-Port 3/27 |90.49 % | | | | |F-Port 3/27 |90.28 % | | | | |F-Port 3/27 |90.20 % |

portstatsshow output shows very high value for the paratmeter "tim_txcrd_z", which is again a clear indication of the port being over utilized.
The "tim_txcrd_z "（Time TX Credit Zero (2.5Us ticks)）parameter in the "portstatshow" command output tells us the number of times, the port was unable to transmit frames because the transmit BB (buffer-to-buffer)credit was zero.

portstatsshow 139 stat_wtx 867666061134 4-byte words transmitted stat_wrx 26321977934672 4-byte words received stat_ftx 3698664129 Frames transmitted stat_frx 52747160766 Frames received stat_c2_frx 0 Class 2 frames received stat_c3_frx 1209135573 Class 3 frames received stat_lc_rx 0 Link control frames received stat_mc_rx 0 Multicast frames received stat_mc_to 0 Multicast timeouts stat_mc_tx 0 Multicast frames transmitted tim_txcrd_z 40540643 Time TX Credit Zero (2.5Us ticks)