Dell Brocade 6520 Release Notes v1.0 - Page 40

 Class 3 frames that have been trapped to CPU will be discarded in the following scenarios on DCX/DCX-4S/DCX 8510 during the following conditions:  HA failover on DCX/DCX-4S/DCX 8510 platforms while running FOS v7.0 or later firmware  Firmware upgrade from v7.0 to a later release on Brocade 300, 5100, VA-40FC, 5300, 6510  Firmware upgrade from v7.0.1 to a later release on Brocade 6505  Firmware upgrade from v7.1.0 to a later release on Brocade 6520  The QSFP information in the sfpshow output will indicate the ID field as all zeros. This is as designed. ras080:FID128:root> sfpshow 5/32 QSFP No: 8 Channel No:0 Identifier: 13 QSFP+ Connector: 12 MPO Parallel Optic Transceiver: 0000000000000000 16_Gbps id  It is recommended that for directors with more than 300 E_Ports, the switch be disabled prior to executing the "switchCfgTrunk" command (used to disable or enable trunking on the switch).  During non-disruptive firmware upgrades, E_Ports in R-RDY mode may cause some frame drops on the E-port links. Fabric OS v7.1.0a Release Notes v1.0 Page 40 of 41