Configuring Fibre Channel Interfaces

This chapter provides information about Fibre Channel interfaces, its features, and how to configure the Fibre Channel interfaces.

Finding Feature Information

Your software release might not support all the features documented in this module. For the latest caveats and feature information, see the Bug Search Tool at https://tools.cisco.com/bugsearch/ and the release notes for your software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the New and Changed chapter or the Feature History table below.

Information About Fibre Channel Interfaces

Forward Error Correction

Forward Error Correction (FEC) allows you to send frames in a way that the receiver can detect and correct errors without the need of retransmitting the frames if there are any errors in the frames. Using FEC, you can transfer frames over impaired links because of an increased tolerance on the receiver side; in fact, in case of bit errors, FEC allows the receiver to correct them.

Transmitter Training Signal (TTS) provides the capability for FC ports to negotiate the following two capabilities:

  1. Enables a receiver to send feedback to a transmitter to assist the transmitter in adapting to the characteristics of the link that connects them.

  2. Allows to use FEC.

For more information on configuring FEC and TTS, see the Configuring FEC section.


Note


Modifying the FEC configuration briefly disrupts traffic on the port.


Out-of-Service Interfaces

On supported modules and fabric switches, you might need to allocate all the shared resources for one or more interfaces to another interface in the port group or module. When an interface is taken out of service, all shared resources are released and made available to the other interface in the port group or module. These shared resources include BB_credits and extended BB_credits. All shared resource configurations are returned to their default values when the interface is brought back into service. Corresponding resources must be made available in order for the port to be successfully returned to service.


Caution


If you need to bring an interface back into service, you might disrupt traffic if you need to release shared resources from other interfaces in the same port group.


Guidelines and Limitations

Port Channel Limitations

Port channels have the following restrictions:

    Port Speed Information

    • Cisco MDS 9700 48-Port 32-Gbps Fibre Channel Switching Module (DS-X9648-1536K9) supports 32 Gbps, 16 Gbps, 8 Gbps, and 4 Gbps speed. However, a single 32-Gbps SFP supports only 32 Gbps, 16 Gbps, and 8 Gbps speed and a single 16 Gbps SFP supports only 16 Gbps, 8 Gbps, and 4 Gbps speed. You must not configure speed values other than the values recommended for these SFPs.

    • Cisco MDS 9700 48-Port 16-Gbps Fibre Channel Switching Module (DS-X9648-768K9) and the Cisco MDS 9000 24/10-Port SAN Extension Module (DS-X9334-K9) (Fibre Channel ports) supports 16 Gbps, 10 Gbps, 8 Gbps, 4 Gbps, and 2 Gbps speeds. However, a single 16 Gbps SFP supports only 16 Gbps, 8 Gbps, and 4 Gbps speed and a single 8-Gbps SFP supports only 8 Gbps, 4 Gbps, and 2 Gbps speed. For 10 Gbps speeds, the 10 Gbps SFP supports only 10 Gbps. You must not configure speed values other than the values recommended for these SFPs.

    The following table describes the results of adding a member to a port channel for various configurations.

    Table 1. Port Channel Configuration and Addition Results

    Port Channel Members

    Configured Speed

    New Member Type

    Addition Type

    Result

    Port Channel

    New Member

    DS-X9448-768K9 and DS-X9334-K9

    Auto

    Auto max 4000

    DS-X9448-768K9 and DS-X9334-K9

    Normal

    Fail

    Force

    Pass

    Auto max 4000

    Auto max 4000

    DS-X9448-768K9 and DS-X9334-K9

    Normal or Force

    Pass

    Auto max 4000

    Auto max 8000 or auto max 16000

    DS-X9448-768K9 and DS-X9334-K9

    Normal

    Fail

    Force

    Pass

    Auto max 8000 or auto max 16000

    Auto max 4000

    DS-X9448-768K9 and DS-X9334-K9

    Normal

    Fail

    Force

    Pass

    DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9

    Auto

    Auto

    DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9

    Normal or Force

    Pass

    Auto

    Auto max 8000 or auto max 16000

    DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9

    Normal

    Fail

    Force

    Pass

    Auto

    Auto max 32000

    DS-X9648-1536K9

    Normal

    Fail

    Force

    Pass

    Auto max 8000

    Auto max 8000

    DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9

    Normal or Force

    Pass

    Auto max 8000

    Auto max 16000

    DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9

    Normal

    Fail

    Force

    Pass

    Auto max 8000

    Auto max 32000

    DS-X9648-1536K9

    Normal

    Fail

    Force

    Pass

    Auto max 16000

    Auto max 16000

    DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9

    Normal or Force

    Pass

    Auto max 16000

    Auto max 8000

    DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9

    Normal

    Fail

    Force

    Pass

    Auto max 16000

    Auto max 32000

    DS-X9648-1536K9

    Normal

    Fail

    Force

    Pass

    DS-X9648-1536K9

    Auto max 32000

    Auto max 32000

    DS-X9648-1536K9

    Normal or force

    Pass

    Auto max 32000

    Auto max 4000, auto max 8000, or auto max 16000

    DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9

    Normal

    Fail

    Force

    Pass

    Use the show port-channel compatibility parameters command to obtain information about port channel addition errors.

    Configuring Fibre Channel Interfaces

    Configuring Port Speed


    Note


    Changing port speed and rate mode disrupts traffic on the port. Traffic on other ports in the port group is not affected.


    To configure the port speed on an interface, perform these steps:

    Procedure


    Step 1

    switch# configure terminal

    Enters configuration mode.

    Step 2

    switch(config)# interface fc 1/1

    Selects the interface and enters interface configuration submode.

    Step 3

    switch(config-if)# switchport speed {1000 | 2000 | 4000 | 8000 | 10000 | 16000 | 32000}

    Configures the port speed in megabits per second. The auto parameter enables autosensing on the interface.

    Step 4

    switch(config-if)# switchport speed auto

    Configures autosensing for an interface.

    Note

     

    The auto speed configurations are available only for the specific modules.

    Step 5

    switch(config-if)# no switchport speed

    Reverts to the default speed for the interface (auto).

    Use the show interface command to verify the port speed configuration for an interface.

    
    switch# show interface fc 9/1
    fc9/1 is up
        Hardware is Fibre Channel, SFP is short wave laser w/o OFC (SN)
        Port WWN is 22:01:00:05:30:01:9f:02
        Admin port mode is F
        snmp traps are enabled
        Port mode is F, FCID is 0xeb0002
        Port vsan is 1
        Speed is 2 Gbps
        Rate mode is shared
        Transmit B2B Credit is 64
        Receive B2B Credit is 16
        Receive data field Size is 2112
        Beacon is turned off
        5 minutes input rate 0 bits/sec, 0 bytes/sec, 0 frames/sec
        5 minutes output rate 0 bits/sec, 0 bytes/sec, 0 frames/sec
          226 frames input, 18276 bytes
            0 discards, 0 errors
            0 CRC, 0 unknown class
            0 too long, 0 too short
          326 frames output, 21364 bytes
            0 discards, 0 errors
          0 input OLS, 0 LRR, 1 NOS, 0 loop inits
          3 output OLS, 2 LRR, 0 NOS, 0 loop inits
          16 receive B2B credit remaining
          64 transmit B2B credit remaining
    

    Configuring FEC

    FEC has the following restrictions:

    • FEC is supported on the DS-X9748-3072K9, DS-X9648-1536K9, DS-X9334-K9, and DS-X9448-768K9 modules in the Cisco MDS 9700 Series switch. FEC is also supported on the Cisco MDS 9132T, MDS 9220i, MDS 9396S, MDS 9148T, and MDS 9396T switches.

    • FEC fallback1 is not supported on the Cisco MDS 48-Port 64-Gbps Fibre Channel Switching Module (DS-X9748-3072K9) and Cisco MDS 9700 48-Port 32-Gbps Fibre Channel Switching Module (DS-X9648-1536K9) when their interfaces are configured at 16-Gbps Fibre Channel fixed speed. However, FEC fallback is supported on the Cisco MDS 9700 48-Port 16-Gbps Fibre Channel Switching Module (DS-X9448-768K9) when its interfaces are configured at 16-Gbps Fibre Channel fixed speed.

    • For Cisco MDS 48-Port 64-Gbps Fibre Channel Switching Module (DS-X9748-3072K9), ensure that both FEC and TTS are configured on local and peer switches to negotiate FEC at 16 Gbps. Also, you must configure the switchport speed 16000 command first, then configure the switchport fec and switchport fec tts commands.

    • Modifying the FEC configuration briefly disrupts traffic on the port.

    • FEC cannot be configured when auto speed is selected for operating speeds 2000/4000/8000/16000. However, FEC is always enabled on ports running at 32-Gbps and higher speeds but no configuration is required.

    • Ports operating at 32 Gbps or higher speeds automatically negotiate FEC because FEC is required at those speeds. No FEC configuration is necessary as the switchport fec and switchport fec tts commands are meant only for 16-Gbps speeds where FEC is optional.

    • From Cisco MDS NX-OS Release 6.2(11c), FEC with Transmitter Training Signal (TTS) is supported on the Cisco MDS 9396S 16-Gbps Multilayer Fabric Switch and Cisco MDS 9700 48-Port 16-Gbps Fibre Channel Switching Module (DS-X9448-768K9), except in Cisco MDS NX-OS Release 6.2(13).

    • From Cisco MDS NX-OS Release 8.2(1), FEC with TTS feature is supported in Simple Network Management Protocol (SNMP) and Device Manager (DM). This feature is not supported in Cisco MDS NX-OS Release 8.1(1) or earlier.

    • From Cisco MDS NX-OS Release 8.4(1), FEC admin state has changed from up or down to on or off respectively.

    To configure FEC on an interface operating at 16-Gbps fixed speed, perform these steps:

    Procedure


    Step 1

    switch# configure terminal

    Enters configuration mode.

    Step 2

    switch(config)# interface fc 1/1

    Selects the interface and enters interface configuration submode.

    Step 3

    switch(config-if)# switchport speed 16000

    Sets the port speed.

    Step 4

    switch(config-if)# switchport fec

    Note

     

    The switchport fec command works only on interfaces that support fixed 16 Gbps and higher speeds and a message stating the same appears when you execute this command.

    Enables FEC for the interface.

    • FEC is active if it is configured on both local and peer switches.

    • FEC is not active if it is configured only on the local switch, but not on the peer switch.

    Step 5

    switch(config-if)# switchport fec tts

    (Optional) Enables TTS, that allows negotiation of FEC. This command is only accepted on interfaces with fixed 16-Gbps speeds and FEC enabled.

    Note

     
    The switchport fec tts command can be used only after configuring FEC using the switchport fec command.

    Use the show interface command to verify the port speed configuration for an interface:

    This example displays the FEC state when FEC is enabled:

    
    switch# show interface fc3/15 | i fec
        admin fec state is on
        oper fec state is down
        
    

    This example displays the FEC state when FEC is disabled:

    
    switch# show interface fc3/15 | i fec
        admin fec state is off
        oper fec state is down
        
    

    Configuring Rate Mode


    Note


    • Changing port speed and rate mode disrupts traffic on the port.

    • Dedicated and shared rate modes are not supported on interfaces that support 16 Gbps or higher speeds.

    • Interfaces that are on modules and switches that support 16 Gbps and higher speeds operate in dedicated mode.


    To configure the rate mode (dedicated or shared) on an interface on a Fibre Channel switching module, perform these steps:

    Procedure


    Step 1

    switch# configure terminal

    Enters configuration mode.

    Step 2

    switch(config)# interface fc 1/1

    Selects the interface and enters interface configuration submode.

    Step 3

    switch(config-if)# switchport rate-mode dedicated

    Reserves dedicated bandwidth for the interface.

    Note

     
    If you cannot reserve dedicated bandwidth on an interface, you might have exceeded the port group maximum bandwidth. Use the show port-resources command to determine what resources are already allocated.

    Step 4

    switch(config-if)# switchport rate-mode shared

    Reserves shared (default) bandwidth for the interface.

    Step 5

    switch(config-if)# no switchport rate-mode

    Reverts to the default state (shared).


    Taking Interfaces out of Service


    Note


    • The interface must be disabled using a shutdown command before it can be taken out of service.

    • The interface cannot be a member of a port channel.

    • Taking interfaces out of service releases all the shared resources to ensure that they are available to other interfaces. This causes the configuration in the shared resources to revert to default when the interface is brought back into service. Also, an interface cannot come back into service unless the default shared resources for the port are available. The operation to free up shared resources from another port is disruptive.


    To take an interface out of service, perform these steps:

    Procedure


    Step 1

    switch# configure terminal

    Enters configuration mode.

    Step 2

    switch(config)# interface fc 1/1

    Selects the interface and enters interface configuration submode.

    Step 3

    switch(config-if)# no channel-group

    Removes the interface from a port channel.

    Step 4

    switch(config-if)# shutdown

    Disables the interface.

    Step 5

    switch(config-if)# out-of-service

    Takes the interface out of service.

    This example shows a 24-port 4-Gbps module:

    
    switch# show port-resources module 1
    Module 1
      Available dedicated buffers for global buffer #0 [port-group 1] are 2618
      Available dedicated buffers for global buffer #1 [port-group 2] are 2149
      Available dedicated buffers for global buffer #2 [port-group 3] are 2150
      Available dedicated buffers for global buffer #3 [port-group 4] are 1102
      Available dedicated buffers for global buffer #4 [port-group 5] are 2150
      Available dedicated buffers for global buffer #5 [port-group 6] are 2150
      Available dedicated buffers for global buffer #6 [port-group 7] are 2150
      Available dedicated buffers for global buffer #7 [port-group 8] are 2150
      Available dedicated buffers for global buffer #8 [port-group 9] are 2150
      Available dedicated buffers for global buffer #9 [port-group 10] are 2150
      Available dedicated buffers for global buffer #10 [port-group 11] are 2150
      Available dedicated buffers for global buffer #11 [port-group 12] are 2150
    
     Port-Group 1
      Total bandwidth is 64.0 Gbps
      Allocated dedicated bandwidth is 64.0 Gbps
      --------------------------------------------------------------------
      Interfaces in the Port-Group       B2B Credit  Bandwidth  Rate Mode
                                            Buffers     (Gbps)
      --------------------------------------------------------------------
      fc1/1                                     500       16.0  dedicated
      fc1/2                                      32       16.0  dedicated
      fc1/3                                     500       16.0  dedicated
      fc1/4                                     500       16.0  dedicated
    
     Port-Group 2
      Total bandwidth is 64.0 Gbps
      Allocated dedicated bandwidth is 52.0 Gbps
      --------------------------------------------------------------------
      Interfaces in the Port-Group       B2B Credit  Bandwidth  Rate Mode
                                            Buffers     (Gbps)
      --------------------------------------------------------------------
      fc1/5                                     500       16.0  dedicated
      fc1/6                                     500       16.0  dedicated
      fc1/7                                     500        4.0  dedicated
      fc1/8                                     500       16.0  dedicated
    
    .
    .
    .
    
     Port-Group 12
      Total bandwidth is 64.0 Gbps
      Allocated dedicated bandwidth is 64.0 Gbps
      --------------------------------------------------------------------
      Interfaces in the Port-Group       B2B Credit  Bandwidth  Rate Mode
                                            Buffers     (Gbps)
      --------------------------------------------------------------------
      fc1/45                                    500       16.0  dedicated
      fc1/46                                    500       16.0  dedicated
      fc1/47                                    500       16.0  dedicated
      fc1/48                                    500       16.0  dedicated
    
    

    Configuring Transceiver (SFP) Power Saving

    You can configure the SFP power saving feature to cut off the to the transceiver even when the ports are in administratively in no shut state.


    Note


    • When the feature is enabled, SFP is present and port is admin-down , then the Power is off.

    • When you upgrade to Cisco MDS NX-OS Release 9.4(2), by default the feature is enabled.

    • When you downgrade from Cisco MDS NX-OS Release 9.4(2), ensure the feature is disabled.

    • When you downgrade from Cisco MDS NX-OS Release 9.4(2) and upgrade back to Cisco MDS NX-OS Release 9.4(2), by default the feature is still disabled.

    • Feature is available on these models:

      • Cisco MDS 9700 48-Port 64-Gbps Fibre Channel Switching Module

      • Cisco MDS 9124V

      • Cisco MDS 9148V

      • Cisco MDS 9396V


    Procedure


    Step 1

    switch# configure terminal

    Enters configuration mode.

    Step 2

    switch(config)# system transceiver power-control

    Enables the SFP power saving feature. The nosystem transceiver power-control disables the feature

    Use theshow show systemtransceiverpower-control command to display if the feature is enabled or disabled.

    
    switch# show system transceiver power-control
    Power control is on

    Verifying Fibre Channel Interfaces Configuration

    To display Fibre Channel interface configuration information, perform one of the following tasks:

    Command

    Purpose

    show module

    Displays the module.

    show module slot recovery-steps

    Displays the slot for the module.

    show port-resources module slot

    Displays the port resources for the slot.

    show interface fc slot/port

    Displays the slot or port information. FEC admin and operational states are displayed.

    show interface brief

    Displays the interface.

    show port index-allocation

    Displays the port in the index allocation.

    show port index-allocation startup

    Displays the startup port in the index allocation.

    show port-channel compatibility parameters

    Displays the port channel compatibility parameters.

    show module slot bandwidth-fairness

    Displays the module slot bandwidth fairness information.

    For detailed information about the fields in the output from these commands, refer to the Cisco MDS 9000 Series Command Reference.

    Displaying FEC Module Interfaces

    This example shows a 32-Gbps Fibre Channel interface status:


    Note


    32-Gbps Fibre Channel ports comes up automatically in FEC and need not be configured.


    
    switch# show interface fc 10/21 brief
     --------------------------------------------------------------------------------
    ---------
    Interface  Vsan   Admin  Admin   Status       SFP    Oper  Oper   Port     Logical
                      Mode   Trunk                       Mode  Speed  Channel   Type
                             Mode                              (Gbps)
    --------------------------------------------------------------------------------
    fc10/21     1      auto   on      trunking     swl   TE     32     --       core
    
    
    
    switch# show interface fc10/21
    fc10/21 is trunking
        Hardware is Fibre Channel, SFP is short wave laser w/o OFC (SN)
        Port WWN is 22:55:54:7f:ee:ea:1f:00
        Peer port WWN is 22:24:54:7f:ee:ea:1d:00
        Admin port mode is auto, trunk mode is on
        snmp link state traps are enabled
        Port mode is TE
        Port vsan is 1
        Admin Speed is auto max 32 Gbps
        Operating Speed is 32 Gbps
        Rate mode is dedicated
        Port flow-control is R_RDY
    
        Transmit B2B Credit is 500
        Receive B2B Credit is 500
        B2B State Change Number is 14
        Receive data field Size is 2112
        Beacon is turned off
        fec is enabled by default
        Logical type is core
        Trunk vsans (admin allowed and active) (1)
        Trunk vsans (up)                       (1)
        Trunk vsans (isolated)                 ()
    
    

    Displaying SFP Diagnostic Information

    You can use the show interface interface-range transceiver details command to display small form-factor pluggable (SFP) diagnostic information.

    
    switch# show interface fc1/5 transceiver details
    fc1/5 sfp is present
        Name is CISCO-AVAGO
        Manufacturer's part number is SFBR-5780APZ-CS2
        Revision is G2.3
        Serial number is AGD151785V6
        Cisco part number is 10-2418-01
        Cisco pid is DS-SFP-FC8G-SW
        FC Transmitter type is short wave laser w/o OFC (SN)
        FC Transmitter supports short distance link length
        Transmission medium is multimode laser with 62.5 um aperture (M6)
        Supported speeds are - Min speed: 2000 Mb/s, Max speed: 8000 Mb/s
        Nominal bit rate is 8500 Mb/s
        Link length supported for 50/125um OM2 fiber is 50 m
        Link length supported for 62.5/125um fiber is 21 m
        Link length supported for 50/125um OM3 fiber is 150 m
        Cisco extended id is unknown (0x0)
    
        No tx fault, no rx loss, in sync state, diagnostic monitoring type is 0x68
        SFP Diagnostics Information:
    ----------------------------------------------------------------------------
                                         Alarms                  Warnings
                                    High        Low         High          Low
    ----------------------------------------------------------------------------
      Temperature   50.26 C         75.00 C     -5.00 C     70.00 C        0.00 C
      Voltage        3.35 V          3.63 V      2.97 V      3.46 V        3.13 V
      Current        8.33 mA         8.50 mA     2.00 mA     8.50 mA       2.00 mA
      Tx Power      -2.45 dBm        1.70 dBm  -14.00 dBm   -1.30 dBm    -10.00 dBm
      Rx Power      -4.81 dBm        3.00 dBm  -17.30 dBm    0.00 dBm    -13.30 dBm
      Transmit Fault Count = 0
    ----------------------------------------------------------------------------
      Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning
    
    

    Beginning with Cisco MDS NX-OS Release 9.3(1) duplicate or Cisco non-Compatible SFPs are also detected. All duplicate SFPs will get error disabled and all duplicate SFP ports are reported in a syslog.

    switch# show interface fc18/45
    
    fc18/45 is down (Error disabled - Duplicate SFP serial number)
        Hardware is Fibre Channel, SFP is short wave laser w/o OFC (SN)
        Port WWN is 23:28:8c:60:4f:32:30:80
        Admin port mode is auto, trunk mode is on
    .
    .
        Transceiver Information:
          Serial number is RS212900040004
          Cisco pid is DS-SFP-FC64G-SW
          Temperature 22.93 C, Voltage 3.34 V, Current 0.00 mA --, TxPower -40.00 dBm --, RxPower -40.00 dBm --
    switch# show interface fc1/3-5 brief 
    
    -----------------------------------------------------------------------------------------
    Interface  Vsan   Admin  Admin   Status       SFP    Oper  Oper   Port     Logical
                      Mode   Trunk                       Mode  Speed  Channel   Type
                             Mode                              (Gbps)
    -----------------------------------------------------------------------------------------
    fc1/3       1      E      on      trunking     swl   TE     32     12       core     
    fc1/4       1      auto   on      notConnected swl   --     --     --       --       
    fc1/5       101    auto   off     notConnected swl   --     --     --       --       

    Displaying SFP Power Saving

    You can use the show interface interface-range transceiver details command to display small form-factor pluggable (SFP) power saving.

    Port is Up with power saving feature is enabled

    
    switch# show interface fc1/1 transceiver details
    fc1/1 sfp is present
        
        Power control is on, Power is on
    
        No tx fault, no rx loss, in sync state, diagnostic monitoring type is 0x68
        SFP Diagnostics Information:
    ----------------------------------------------------------------------------
                                         Alarms                  Warnings
                                    High        Low         High          Low
    ----------------------------------------------------------------------------
      Temperature   32.16 C          75.00 C     -5.00 C     70.00 C        0.00 C
      Voltage        3.29 V           3.63 V      2.97 V      3.46 V        3.13 V
      Current        6.09 mA         11.00 mA     2.00 mA    10.00 mA       3.00 mA
      Tx Power      -2.62 dBm         1.70 dBm  -13.00 dBm   -1.30 dBm     -9.00 dBm
      Rx Power      -5.03 dBm         3.00 dBm  -15.90 dBm    0.00 dBm    -11.90 dBm
      Transmit Fault Count = 0
    ----------------------------------------------------------------------------
      Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning
    
    

    Port is down with power saving feature is enabled

    
    switch# show interface fc1/18 transceiver details
    fc1/18 sfp is present
        
        Power control is off, Power is on
    
        No tx fault, rx loss, no sync exists, diagnostic monitoring type is 0x68
        SFP Diagnostics Information:
    ----------------------------------------------------------------------------
                                         Alarms                  Warnings
                                    High        Low         High          Low
    ----------------------------------------------------------------------------
      Temperature   34.54 C          75.00 C     -5.00 C     70.00 C        0.00 C
      Voltage        3.32 V           3.63 V      2.97 V      3.46 V        3.13 V
      Current        0.00 mA   --    12.00 mA     3.00 mA    11.20 mA       3.60 mA
      Tx Power     -40.00 dBm  --     5.00 dBm  -12.20 dBm    4.00 dBm     -8.20 dBm
      Rx Power     -40.00 dBm  --     5.00 dBm  -15.20 dBm    2.00 dBm    -11.20 dBm
      Transmit Fault Count = 0
    ----------------------------------------------------------------------------
      Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning
            NA  Not available
    

    Port is Up with power saving feature is disabled

    
    switch# show interface fc1/17 transceiver details
    fc1/17 sfp is present
        
        Power control is off, Power is on
    
        No tx fault, no rx loss, in sync state, diagnostic monitoring type is 0x68
        SFP Diagnostics Information:
    ----------------------------------------------------------------------------
                                         Alarms                  Warnings
                                    High        Low         High          Low
    ----------------------------------------------------------------------------
      Temperature   32.52 C          75.00 C     -5.00 C     70.00 C        0.00 C
      Voltage        3.30 V           3.63 V      2.97 V      3.46 V        3.13 V
      Current        7.07 mA          8.64 mA     2.38 mA     8.07 mA       2.86 mA
      Tx Power      -0.64 dBm         5.00 dBm  -12.20 dBm    2.00 dBm     -8.20 dBm
      Rx Power      -1.93 dBm         5.00 dBm  -15.20 dBm    2.00 dBm    -11.20 dBm
      Transmit Fault Count = 0
    ----------------------------------------------------------------------------
      Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning
            NA  Not available
    
    

    Port is down with power saving feature is disabled

    
    switch# show interface fc1/18 transceiver details
    fc1/18 sfp is present
        
        Power control is off, Power is on
    
        No tx fault, rx loss, no sync exists, diagnostic monitoring type is 0x68
        SFP Diagnostics Information:
    ----------------------------------------------------------------------------
                                         Alarms                  Warnings
                                    High        Low         High          Low
    ----------------------------------------------------------------------------
      Temperature   34.54 C          75.00 C     -5.00 C     70.00 C        0.00 C
      Voltage        3.32 V           3.63 V      2.97 V      3.46 V        3.13 V
      Current        0.00 mA   --    12.00 mA     3.00 mA    11.20 mA       3.60 mA
      Tx Power     -40.00 dBm  --     5.00 dBm  -12.20 dBm    4.00 dBm     -8.20 dBm
      Rx Power     -40.00 dBm  --     5.00 dBm  -15.20 dBm    2.00 dBm    -11.20 dBm
      Transmit Fault Count = 0
    ----------------------------------------------------------------------------
      Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning
            NA  Not available
    

    Configuration Examples for Fibre Channel Interfaces

    Configuration Example for FEC Module Interfaces

    These steps describe how to configure FEC module interfaces:

    Procedure


    Step 1

    Select the interfaces fc 4/1 through fc 4/2.

    Example:

    
    switch# configure terminal
    switch(config)# interface fc 4/1 - 2
    
    

    Step 2

    Configure the FEC on the interfaces.

    Example:

    
    switch(config-if)# switchport speed 16000
    switch(config-if)# switchport fec
    
    

    Step 3

    Enable the interfaces and return to configuration mode.

    Example:

    
    switch(config-if)# no shutdown
    switch(config-if)# exit
    
    

    Step 4

    Select the interfaces fc 4/3 through fc 4/4.

    Example:

    
    switch# configure terminal
    switch(config)# interface fc 4/3 - 4
    
    

    Step 5

    Configure the port speed, rate mode, and port mode on the interfaces.

    Example:

    
    switch(config-if)# switchport speed 16000
    switch(config-if)# switchport fec
    
    

    Note

     

    For port that is connected to DWDM devices, when the port speed is set to the default speed of switchport speed auto , the port may take some time to switch to the new port speed. Hence, set the port speed explicitly using the switchport speed {1000 | 2000 | 4000 | 8000 | 10000 | 16000 | 32000} command for such ports to use the new port speed much faster.


    1 When the admin speed is auto and FEC is configured on either side of a link, but the link does not come up in FEC mode.