cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
2245
Views
0
Helpful
5
Replies
Highlighted
Beginner

Nexus 5500 - Fabricpath Core Port - Error disabled. Reason:DCX-No ACK in 100 PDUs

Has anyone seen Fabricpath Core Interfaces between two Nexus 5596UP switches error-disabled because of missing DCBX Acks after 50mins?

I do not see interface errors and the peer is another 5500.

Both switches are running 5.1(3)N2(1) with this port config:

int e1/3

switchport mode fabricpath

! Cisco 5m Twinax cables

Log messages

2012 May 25 17:40:59 nexus1 %L3VM-5-FP_TPG_INTF_DOWN: Interface Ethernet1/3 down in fabricpath topology 0 - Interface down

2012 May 25 17:40:59 nexus1 %ETHPORT-5-IF_DOWN_NONE: Interface Ethernet1/3 is down (None)

2012 May 25 17:40:59 nexus1 %ISIS_FABRICPATH-5-ADJCHANGE:  isis_fabricpath-default [3365]  P2P adj L1 nexus5 over Ethernet1/3 - DOWN (Delete All) on MT-0

2012 May 25 17:40:59 nexus1 %CDP-5-NEIGHBOR_REMOVED: CDP Neighbor nexus5(FOX1550GDH1) on port Ethernet1/3 has been removed

2012 May 25 17:40:59 nexus1 %LLDP-5-SERVER_REMOVED: Server with Chassis ID 547f.ee63.fa88 Port ID Eth1/1 on local port Eth1/3 has been removed

2012 May 25 17:40:59 nexus1 %ETHPORT-2-IF_DOWN_ERROR_DISABLED: Interface Ethernet1/3 is down (Error disabled. Reason:DCX-No ACK in 100 PDUs)

Robert

5 REPLIES 5
Highlighted
Enthusiast

Re: Nexus 5500 - Fabricpath Core Port - Error disabled. Reason:D

Can you send the output of

show lldp interface ethernet 1/3
show lldp dcbx interface ethernet 1/3

a workaround may be to disable lldp on both sides on these physical interfaces
Highlighted
Enthusiast

Nexus 5500 - Fabricpath Core Port - Error disabled. Reason:DCX-N

Any update ?

Highlighted
Beginner

Nexus 5500 - Fabricpath Core Port - Error disabled. Reason:DCX-N

I had to build the lab from scratch for different tests... I can't do so right now. It seems to be a bug because everbody recommends either disabling LLDP globally or per interface or disabling DCBX LLDP TLVs.

Highlighted
Beginner

Re: Nexus 5500 - Fabricpath Core Port - Error disabled. Reason:DCX-No ACK in 100 PDUs

You can check on layer 1 issue. Mine has solve by fixing the fiber cables. 

Before fixing the fiber cables.

anx0110m02-anx0110c02# sh int eth1/20 transceiver details

Ethernet1/20

    transceiver is present

    type is 10Gbase-SR

    name is CISCO-FINISAR

    part number is FTLX8574D3BCL-C3

    revision is A

    serial number is FNS22010BHD

    nominal bitrate is 10300 MBit/sec

    Link length supported for 50/125um OM2 fiber is 82 m

    Link length supported for 62.5/125um fiber is 26 m

    Link length supported for copper is 40 m

    Link length supported for 50/125um OM3 fiber is 300 m

    cisco id is --

    cisco extended id number is 4

    cisco part number is 10-3105-01

    cisco product id is SFP-10G-SR-S

    cisco vendor id is V01

    number of lanes 1

 

           SFP Detail Diagnostics Information (internal calibration)

  ----------------------------------------------------------------------------

                Current              Alarms                  Warnings

                Measurement     High        Low         High          Low

  ----------------------------------------------------------------------------

  Temperature   18.77 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  --   13.00 mA     4.00 mA    12.50 mA       5.00 mA

  Tx Power     -20.00 dBm --   21.69 dBm    8.69 dBm   18.69 dBm     12.69 dBm

  Rx Power       1.36 dBm --   22.00 dBm    6.09 dBm   18.99 dBm     10.09 dBm

  Transmit Fault Count = 0

  ----------------------------------------------------------------------------

  Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning

 

After fixing the fiber cables

 

anx0110m02-anx0110c02# sh int eth1/20 transceiver  det

Ethernet1/20

    transceiver is present

    type is 10Gbase-SR

    name is CISCO-FINISAR

    part number is FTLX8574D3BCL-C3

    revision is A

    serial number is FNS2201058B

    nominal bitrate is 10300 MBit/sec

    Link length supported for 50/125um OM2 fiber is 82 m

    Link length supported for 62.5/125um fiber is 26 m

    Link length supported for copper is 40 m

    Link length supported for 50/125um OM3 fiber is 300 m

    cisco id is --

    cisco extended id number is 4

    cisco part number is 10-3105-01

    cisco product id is SFP-10G-SR-S

    cisco vendor id is V01

    number of lanes 1

 

           SFP Detail Diagnostics Information (internal calibration)

  ----------------------------------------------------------------------------

                Current              Alarms                  Warnings

                Measurement     High        Low         High          Low

  ----------------------------------------------------------------------------

  Temperature   20.12 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        8.42 mA       13.00 mA     4.00 mA    12.50 mA       5.00 mA

  Tx Power      17.91 dBm      21.69 dBm    8.69 dBm   18.69 dBm     12.69 dBm

  Rx Power      16.81 dBm      22.00 dBm    6.09 dBm   18.99 dBm     10.09 dBm

  Transmit Fault Count = 0

  ----------------------------------------------------------------------------

  Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning

 

Highlighted
Beginner

Re: Nexus 5500 - Fabricpath Core Port - Error disabled. Reason:DCX-No ACK in 100 PDUs

Look at the differences of the Tx Power and Rx Power.