Service Manual

Fabric OS 7.4.0a Release Notes v2.0 Page 42 of 53
• It is important to note that the outputs of slotshow –p and chassisShow commands also display the
maximum allowed power consumption per slot. These are absolute maximum values and should not be
confused with the real-time power consumption on 16G blades. The chassisshow command has a “Power
Usage (Watts):” field that shows the actual power consumed in real-time on 16G blades.
• 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
00000000000000000000000000000000
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.
• The Brocade Network Advisor seed switch should always have the highest FOS version used in the fabric.
• For login authentication through RADIUS, Brocade switch should be able to reach RADIUS servers through
TCP authentication port (default 1812) and accounting port (default 1813). Both of these ports must be
kept open in any firewall settings.
• When a firmware upgrade on a Brocade 6510 switch initiated through Brocade Network Advisor results
with “failed to enforce new iptable rules” error message, the switch could be inaccessible via SSH and/or
Telnet. Activating (from console) a new policy with the rules of the default active policy will restore access
to the switch.
• The Location ID parameter under the configure CLI affects routing calculations, and should remain set to
the default value of 0 for normal use. Do not change the value unless explicitly instructed to do so by a
Brocade Support engineer.
• Fabric OS Command Reference contains an error for the command creditRecovMode. The
creditRecovMode --fe_crdloss configures time-out based credit loss detection of Condor-2 front-end ISL
links. However, this feature is NOT enabled by default.
• Support for the 16G 2km ICL QSFP optics has the following notes:
o The maximum number of ICL ports with the 2km ICL QSFP can be supported in an 8510 backbone
switch with the two kilometer distance is 10, which requires 16 credits configured per Virtual Channel.
More ports can be supported with less distance and fewer credits. Full 16 ICL ports can be supported
with 11 credits configured per Virtual Channel for upto 1,375 meters.
o Before the ICL ports with the 2km ICL QSFP come online, switchShow CLI command may display the
port states as in-sync or shifting in and out of port fault.
o The sfpShow CLI command displays the 16G 2km ICL QSFP incorrectly as “Length Cu: 3 (units m)”
instead of the correct value 0.
o Firmware downgrade from FOS v7.3.1 to a prior version is blocked if ICL ports with 2km ICL QSFP
optics are present in the switch.
• The maximum number of ports supported for slow drain device quarantine in the same zone with a slow-
draining device port is 32. If the 32-port zone limit is exceeded, the quarantine action will not be taken.
Once the 32-port zone limit is reached, any new zoned device or port coming online will not be
quarantined.