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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

3 REPLIES
Silver

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
Silver

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

Any update ?

New Member

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.

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