Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 530)

Reserved Buffers = 406
Warning: port may be reserving more credits depending on port speed.
switch:admin> portshow 1/2
portName:
portHealth: OFFLINE
Authentication: None
portDisableReason: None
portCFlags: 0x1
portFlags: 0x1 PRESENT U_PORT
portType: 17.0
portState: 2 Offline
Protocol: FC
portPhys: 2 No_Module
portScn: 0
port generation number: 0
portId: 010200
portIfId: 4312003b
portWwn: 20:02:00:05:1e:94:0f:00
portWwn of device(s) connected:
Distance: static (desired = 100 Km)
portSpeed: N8Gbps
LE domain: 0
FC Fastwrite: OFF
Interrupts: 0 Link_failure: 0 Frjt: 0
Unknown: 0 Loss_of_sync: 0 Fbsy: 0
Lli: 0 Loss_of_sig: 3
Proc_rqrd: 5 Protocol_err: 0
Timed_out: 0 Invalid_word: 0
Rx_flushed: 0 Invalid_crc: 0
Tx_unavail: 0 Delim_err: 0
Free_buffer: 0 Address_err: 0
Overrun: 0 Lr_in: 0
Suspended: 0 Lr_out: 0
Parity_err: 0 Ols_in: 0
2_parity_err: 0 Ols_out: 0
CMI_bus_err: 0
Enabling long distance when connecting to TDM devices
Use this procedure when connecting to time-division multiplexing (TDM) devices and your Brocade
switch has QoS and buffer credit recovery enabled.
1. Connect to the switch and log in using an account assigned to the admin role.
2. Disable QoS.
switch:admin> portcfgqos --disable[slot/]port
If you do not disable QoS, after the second or third link reset (LR), ARB fill words display. Refer to
the Fabric OS Command Reference for more for more information on setting fill words.
3. Disable buffer credit recovery; buffer credit recovery is not compatible with the IDLE mode. If you do
not disable buffer credit recovery, it continues to perform a link reset.
switch:admin> portcfgcreditrecovery --disable [slot/]port
4. Configure the port to support long-distance links.
switch:admin> portcfglongdistance [slot/]port,LS,0,-distance 100
Forward error correction on long-distance links
Forward error correction (FEC) on user ports is supported for LD and LS long-distance modes. Use
the portCfgLongDistance command with the -fecEnable or -fecDisable options to enable or disable
FEC, respectively, on a user port. Alternatively, you can use the portCfgFec command with the --
enable or --disable option as you would for any regular port.
Enabling long distance when connecting to TDM devices
530 Fabric OS Administrators Guide
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