Reference Guide

∙ Powering off and on or plugging in and out slots containing ports in D_Port mode results in those ports losing the dynamic
D_Port state when the slot or port is back up. If this happens, you must reconfigure the static D_Port mode on the HBA.
NOTE
Note the following considerations applicable to 32-Gbps SFPs and QSFPs.
With the introduction of the new SFPs and QSFPs, FEC and FEC with Transmitter Training SIgnal (TTS) mode is enabled by default for
32 Gbps. FEC cannot be disabled in this case. The following table summarizes the state of the FEC fields and the resulting behavior.
TABLE 84 FEC field state and behavior for 32-Gbps tests
Field State/Behavior
Enabled State is "Yes" if port is FEC capable and FEC is configured by means of
the portCfgFEC command. For 32-Gbps SFP/QSFPs at link speed of 32
Gbps, FEC is enabled by default and cannot be disabled.
Option State is "Yes" if portDporttest command is used with the -fec option. For
link speed of 32 Gbps, FEC is auto enabled, irrespective of this option.
Active State is "Yes" always for 32 Gbps alone. This depends on the capability of
local and remote ports and does not depend on the -fec option alone.
The output of the portdporttest --show command displays FEC = Yes for both Enabled and Active for 32 Gbps only. The output is not
changed for port speeds of 10 or 16 Gbps.
Confirming SFP and link status with an HBA
The steps in the following example illustrate how the bcu diag --dportenable command will fail with an SFP installed but without a
connection to the switch.
1. Confirm the initial port status.
# bcu port --list
---------------------------------------------------------------------------
Port# FN Type PWWN/MAC FC Addr/ Media State Spd
Eth dev
---------------------------------------------------------------------------
1/0 - fc 10:00:8c:7c:ff:1c:e9:00 160000 sw Linkup 16G*
0 fc 10:00:8c:7c:ff:1c:e9:00 160000 sw Linkup 16G*
1/1 - fc 10:00:8c:7c:ff:1c:e9:01 -- sw Linkdown ---
1 fc 10:00:8c:7c:ff:1c:e9:01 -- sw Linkdown ---
---------------------------------------------------------------------------
2. Disable the port.
# bcu port --disable 1/0
port disabled
3. Remove the connection to the switch and attempt to enable the D_Port.
# bcu diag --dportenable 1/0
ERROR: Timer expired - Retry if persists contact support
4. Install an SFP and attempt to enable the D_Port.
# bcu diag --dportenable 1/0
ERROR: Switch port is not D_Port capable or D_Port is disabled
Diagnostic Port
Brocade Fabric OS Administration Guide, 8.0.1
432 53-1004111-02