Brocade Troubleshooting and Diagnostics Guide v6.1.0 (53-1000853-01, June 2008)

52 Fabric OS Troubleshooting and Diagnostics Guide
53-1000853-01
Considerations for downgrading firmware
5
Message The command failed due to presence of long-distance ports in L0.5 mode. Please remove these
settings before proceeding.
Probable cause and recommended action
The firmware download operation was attempting to upgrade a system to Fabric OS v6.0.0 with
long-distance ports in L0.5, L1, or L2 modes. Long-distance ports in these modes are not
supported in firmware v6.0.0 or later, so the firmware upgrade operation failed.
Message The command failed due to presence of long-distance ports in LS mode. Please remove these
settings before proceeding.
Probable cause and recommended action
The firmware download operation was attempting to downgrade a system to Fabric OS v5.0.0 or
earlier with long-distance ports in LS mode. Long-distance ports in LS mode is not supported in
firmware v5.0.0 or earlier, so the firmware download operation failed.
Change the long distance port setting to a supported distance setting using the
portCfgLongDistance command and then retry the firmware download operation. The supported
settings are:
L0 Specify L0 to configure the port to be a regular switch port. A total of 20 full-size frame
buffers are reserved for data traffic, regardless of the port’s operating speed; therefore,
the maximum supported link distance is 10 km, 5 km, or 2.5 km for the port at speeds
of 1 Gbps, 2 Gbps, or 4 Gbps, respectively.
LE Specify LE mode is used for E_Ports for distances beyond 5 Km and up to 10 Km. A
total of 5, 10, or 20 full-size frame buffers are reserved for port speeds of 1 Gbps, 2
Gbps, or 4 Gbps, respectively. LE does not require an Extended Fabrics license.
LD Specify LD for automatic long-distance configuration. The buffer credits for the given
E_Port are automatically configured, based on the actual link distance. Up to a total of
250 full-size frame buffers are reserved, depending upon the distance measured
during E_Port initialization. If the desired distance is provided, it is used as the upper
limit to the measured distance. For Bloom1-based systems, the number of frame
buffers is limited to 63.
LS Specify LS mode to configure a long-distance link with a fixed buffer allocation. Up to a
total of 250 full-size frame buffers are reserved for data traffic, depending on the
desired distance value provided with the portCfgLongDistance command. For
Bloom1-based systems, the number of frame buffers is limited to 63.
L0 Specify L0 to configure the port to be a regular switch port. A total of 20 full-size frame
buffers are reserved for data traffic, regardless of the port’s operating speed; therefore,
the maximum supported link distance is 10 km, 5 km, or 2.5 km for the port at speeds
of 1 Gbps, 2 Gbps, or 4 Gbps, respectively.
L0.5 Specify L0.5 (portCfgShow displays the two-letter code as LM) long distance to support
a long distance link of up to 25 km. A total of 12, 25, or 50 full-size frame buffers are
reserved for data traffic for the port at speeds of 1 Gbps, 2 Gbps, or 4 Gbps,
respectively.
L1 Specify L1 long distance to support a long distance link up to 50 km. A total of 25, 50,
or 100 full-size frame buffers are reserved for data traffic for the port at speeds of 1
Gbps, 2 Gbps, or 4 Gbps, respectively.
L2 Specify L2 long distance to support a long distance link up to 100 km. A total of 50,
100, or 200 full-size frame buffers are reserved for data traffic for the port at speeds of
1 Gbps, 2 Gbps, or 4 Gbps, respectively.