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FCIP (Brocade 7800 and FX8-24)
Any firmware activation will disrupt I/O traffic on FCIP links.
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Latency measurements supported on FCIP Tunnels:1GbE & 10GbE - 200ms round trip time and 1% loss.
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After inserting a 4G SFP in GE ports of an FX8-24 blade or 7800 switch, sometimes "sfpshow" output
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might display "Cannot read serial data!". Removing and re-inserting the SFP should resolve this
recommended that users perform sfpshow immediately after inserting the SFP and ensure SFP is seated
properly before connecting the
When running FOS v7.2.0 or later, if the new FCIP Circuit Group feature is configured on any FCIP Circuits,
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a downgrade operation to pre-FOS v7.2.0 will be blocked until the feature is removed from the FCIP
configuration(s).
Under very rare conditions, FX8-24, 7800, and BES switches may set to faulty with code 2004c during
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firmwaredownload or hareboot. This could be caused by internal communication link initialization failure
after a reset. The switch can be easily recovered by power cycling. Supportsave should be taken before
power cycling the switch to ensure the fault reason can be investigated by technical support providers.
Extension (Brocade 7840)
Brocade 7840 does not support FCIP connection to Brocade 7800 or FX8-24.
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FOS v7.4 does not support 10G speed on the 24 16G FC ports on Brocade 7840.
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FOS v7.4 does not support VEX port on Brocade 7840.
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Running offline diagnostic tests results in FCIP tunnels down. Reboot the switch after offline diagnostic
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tests to recover the tunnels.
Brocade 7840 supports Brocade 10 Gbps Tunable DWDM 80KM SFP+ optical transceiver. Following CLI
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command can be used to configure the transceiver usage in Brocade 7840.
portcfgge ge_num --set -channel <channel_num>
o
The channel number can have a value of 1 through 102. The detailed explanation of the values are
provided in the product data sheet at the following link:
http://www.brocade.com/downloads/documents/data_sheets/product_data_sheets/10gbe-tunable-
dwdm-80km-sfp-ds.pdf
When Brocade Network Advisor (BNA) v12.3.2 is used to download firmware on Brocade 7840, BNA
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reports success of firmware download prematurely when 7840 has not reached High Availability state.
Customers for 7840 using BNA to download firmware should wait for extra fifteen minutes after BNA
reports success to resume a work load.
Firmware downgrade from FOS v7.4 to FOS v7.3.0c or earlier should be avoided. Otherwise, the Brocade
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7840 may become faulty. (Downgrading to FOS v7.3.0b5 can be used as a workaround.)
FOS v7.4 does not support HCL with IP Extension.
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Fast deflate compression is supported only with FC traffics only, not with IP Extension.
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IP fragmentation is not supported on the LAN side ports.
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When running IPSec, it is recommended that both sides of the extension tunnel are running the same FOS
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version.
When IP Extension traffic volume is high, the target device may back pressure the LAN interface of the
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Brocade 7840 via Ethernet pause. The target side 7840 will go into flow control. While the 7840 is under
flow control, it is possible that non-TCP frames destined for the target device will be dropped. TCP frames
will be unaffected. When the target device is a TS7720, this can cause the automated PINGs to be lost.
This can result in an alert raised by the local TS7720 indicating frame loss at the remote end. In these
cases, the data load is unaffected and this error should be ignored. This feature can be disabled on the
TS7720.
Fabric OS 7.4.1a Release Notes v3.0
cables.
issue.
It is
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