Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x

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.

Guidelines and Recommendations :

FEC on Cisco MDS 9000 Series switches should be disabled on 16 Gbps links.
Ensure that enough buffer credits are configured on MDS ports to cover the distance for the specific frame size.
Use logical link bundling via port channels across DWDM links even in case of different path lengths. The superior technology of port channels to any other logical bundling solution in the industry makes this possible and provides the benefit of higher reliability without impacting FSPF routing decisions.
Check with your DWDM vendor for specific configurations and setting, specifically for NOS/LOS propagation.

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.

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:

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

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 Members	Port Channel	New Member	New Member Type	Addition Type	Result
DS-X9448-768K9 and DS-X9334-K9	Auto	Auto max 4000	DS-X9448-768K9 and DS-X9334-K9	Normal	Fail
	Auto	Auto max 4000	DS-X9448-768K9 and DS-X9334-K9	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
	Auto max 4000	Auto max 8000 or auto max 16000	DS-X9448-768K9 and DS-X9334-K9	Force	Pass
	Auto max 8000 or auto max 16000	Auto max 4000	DS-X9448-768K9 and DS-X9334-K9	Normal	Fail
	Auto max 8000 or auto max 16000	Auto max 4000	DS-X9448-768K9 and DS-X9334-K9	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
	Auto	Auto max 8000 or auto max 16000	DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9	Force	Pass
	Auto	Auto max 32000	DS-X9648-1536K9	Normal	Fail
	Auto	Auto max 32000	DS-X9648-1536K9	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
	Auto max 8000	Auto max 16000	DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9	Force	Pass
	Auto max 8000	Auto max 32000	DS-X9648-1536K9	Normal	Fail
	Auto max 8000	Auto max 32000	DS-X9648-1536K9	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
	Auto max 16000	Auto max 8000	DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9	Force	Pass
	Auto max 16000	Auto max 32000	DS-X9648-1536K9	Normal	Fail
	Auto max 16000	Auto max 32000	DS-X9648-1536K9	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
	Auto max 32000	Auto max 4000, auto max 8000, or auto max 16000	DS-X9448-768K9, DS-X9334-K9, and DS-X9648-1536K9	Force	Pass

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

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.
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

The transceiver power saving feature allows the switch to turn off the power to transceivers(SFPs) when the interface is put into an admin-down (shutdown) state. This reduces the switch's power comsuption resulting in a total power reduction.

You can configure the transceiver power saving feature to cut off the power to the transceiver regardless of the status of the interface.

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

The feature applies to all types of transceivers in the supported switches and modules.

Procedure

Step 1

switch# configure terminal

Enters configuration mode.

Step 2

switch(config)# system transceiver power-control

Enables the SFP power saving feature. The no system 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

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
    Name is CISCO-INNOLIGHT
    Manufacturer's part number is TR-WR13L-NCI
    Hardware revision is 1B
    Serial number is INL280107P0
    Nominal bit rate is 57800 Mb/s
    Link length supported for 9/125um fiber is 10 km
    FC Transmitter type is long wave laser cost reduced
    FC Transmitter supports long distance link length
    Transmission medium is single mode (SM) laser
    Supported speeds are - Min speed: 16000 Mb/s, Max speed: 64000 Mb/s
    Cisco extended id is none (0x0)
    Cisco vendor id is (0x23)
    Cisco part number is 10-3589-01
    Cisco pid is DS-SFP-FC64G-LW
    Cisco version id is V01
    Firmware version is 0.24
    Power control is on, Power is off

    No tx fault, no rx loss, no sync exists, diagnostic monitoring type is 0x68
    SFP Diagnostics Information:
    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 fc10/1 transceiver details
fc10/1 sfp is present
    Name is CISCO-INNOLIGHT
    Manufacturer's part number is TR-WR13L-NCI
    Hardware revision is 1B
    Serial number is INL280107P0
    Nominal bit rate is 57800 Mb/s
    Link length supported for 9/125um fiber is 10 km
    FC Transmitter type is long wave laser cost reduced
    FC Transmitter supports long distance link length
    Transmission medium is single mode (SM) laser
    Supported speeds are - Min speed: 16000 Mb/s, Max speed: 64000 Mb/s
    Cisco extended id is none (0x0)
    Cisco vendor id is (0x23)
    Cisco part number is 10-3589-01
    Cisco pid is DS-SFP-FC64G-LW
    Cisco version id is V01
    Firmware version is 0.24
    Power control is on, Power is off

    No tx fault, no rx loss, no sync exists, diagnostic monitoring type is 0x68
    SFP Diagnostics Information:
----------------------------------------------------------------------------
                                     Alarms                  Warnings
                                High        Low         High          Low
----------------------------------------------------------------------------
  Temperature        NA         NA          NA          NA            NA
  Voltage            NA         NA          NA          NA            NA
  Current            NA         NA          NA          NA            NA
  Tx Power           NA         NA          NA          NA            NA
  Rx Power           NA         NA          NA          NA            NA
  Transmit Fault Count  : NA
----------------------------------------------------------------------------
  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

You can also use the show interface command to get similar information. Here is an example:


switch# show interface fc10/1
fc10/1 is down (Administratively down)
    Hardware is Fibre Channel, SFP is long wave laser cost reduced
    Port WWN is 22:41:54:7f:ee:ea:6f:00
    Admin port mode is auto, trunk mode is on
    snmp link state traps are enabled
    Port vsan is 1
    Receive data field Size is 2112
    Beacon is turned off
    Logical type is Unknown(0)
    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
      1202512 frames input,105165544 bytes
        0 discards,0 errors
        0 invalid CRC/FCS,0 unknown class
        0 too long,0 too short
      573110 frames output,31269868 bytes
        0 discards,0 errors
      4 input OLS,1  LRR,0 NOS,0 loop inits
      5 output OLS,4 LRR, 3 NOS, 0 loop inits
    6 Zone drops
    0 FIB drops for ports 1-24
    0 XBAR errors for ports 1-24
    0 Other drop count for ports 1-1
    0 timeout discards, 0 credit loss
    3 link failures, 0 sync losses, 0 signal losses
    9 Transmit B2B credit transitions to zero
    5 Receive B2B credit transitions to zero
    0 2.5us TxWait due to lack of transmit credits
    Percentage TxWait for last 1s/1m/1h/72h: 0%/0%/0%/0%
    25 2.5us RxWait due to lack of receive credits
    Percentage RxWait for last 1s/1m/1h/72h: 0%/0%/0%/0%
    Interface last changed at Thu Oct 17 15:21:52 2024
    Last clearing of "show interface" counters: never
    Transceiver Information:
      Serial number is INL280107P0
      Cisco pid is DS-SFP-FC64G-LW
      Temperature NA, Voltage NA, Current NA, TxPower NA, RxPower NA
      Power control is on, Power is off

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.

Bias-Free Language

Book Title

Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x

Chapter Title

Configuring Fibre Channel Interfaces

Results

Chapter: Configuring Fibre Channel Interfaces

Configuring Fibre Channel Interfaces

Finding Feature Information

Guidelines and Recommendations :

Forward Error Correction

Out-of-Service Interfaces

Port Channel Limitations

Configuring Port Speed

Procedure

Configuring FEC

Procedure

Configuring Rate Mode

Procedure

Taking Interfaces out of Service

Procedure

Configuring Transceiver (SFP) Power Saving

Procedure

Verifying Fibre Channel Interfaces Configuration

Displaying FEC Module Interfaces

Displaying SFP Diagnostic Information

Displaying SFP Power Saving

Port is Up with power saving feature is enabled

Port is down with power saving feature is enabled

Port is Up with power saving feature is disabled

Port is down with power saving feature is disabled

Configuration Example for FEC Module Interfaces

Procedure

Example:

Example:

Example:

Example:

Example:

Was this Document Helpful?

Contact Cisco