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Brocade switch port flaps without any media errors reported

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Category:
fabric-interconnect-and-management-switches
Specialty:
brocade
Last Updated:

Applies to

Brocade Switch

Issue

  • Brocade switch port flaps without any media errors being reported under porterrshow.
  • Switchshow reports the port as online
 
/fabos/bin/switchshow :
switchName: BROCADEXX
switchType: 166.0
switchState: Online
switchMode: Native
Index Slot Port Address Media  Speed        State    Proto
============================================================
240   12   16   67f040   id    N16   Online      FC  F-Port  x1:00:00:24:ff:1d:xx:xy
 
 
 
/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
240:    2.5k    2.5k    0       0       0       0       0       0       0       0       5       0       5       0       0       0       0       0       0
 
 
  • Fabriclog shows the port flapping happened just once:
04:14:47.513170 SCN Port Offline;rsn=0x4,g=0x20             A2,P0  A2,P0  240   NA
04:14:47.513177 *Removing all nodes from port               A2,P0  A2,P0  240   NA
04:14:47.000670 SCN LR_PORT(0);g=0x5ea                      A2,P0  A2,P0  240   NA
04:14:47.065831 SCN Port Online; g=0x5ea,isolated=0         A2,P0  A2,P1  240   NA
04:14:47.065910 Port Elp engaged                            A2,P1  A2,P0  240   NA
04:14:47.065920 *Removing all nodes from port               A2,P0  A2,P0  240   NA
04:14:47.066147 SCN Port F_PORT                             A2,P1  A2,P0  240   NA
 
 
  • SFP TX and RX power are within the recommended range under sfpshow 
=============
Slot 12/Port 16:
=============
 
RX Power:    -2.8    dBm (528.3uW)
TX Power:    -1.7    dBm (677.0 uW)
 
  • Portshow displays Lr-in greater than Ols_out

Lr_in:             1       Ols_in:       0
Lr_out:            0       Ols_out:      0

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