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Nexus N5K-C5548UP UDLD troubles

e.wahl
Level 1
Level 1

I haven't been able bringing up links between N7k and and the new N5K (5548UP)  due to errors with UDLD.

Someone else facing same problem ?

regards

Edmund

N5K:

Software

  BIOS:      version 3.5.0

  loader:    version N/A

  kickstart: version 5.1(3)N2(1a)

  system:    version 5.1(3)N2(1a)

N7K:

Software

  BIOS:      version 3.22.0

  kickstart: version 5.1(4)

  system:    version 5.1(4)

Logs at N7K:

2012 Jun 15 14:46:58 swi-svi00A %ETHPORT-5-SPEED: Interface Ethernet1/2, operational speed changed to 10 Gbps

2012 Jun 15 14:46:58 swi-svi00A %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/2, operational duplex mode changed to Full

2012 Jun 15 14:46:58 swi-svi00A %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/2, operational Receive Flow Control state cha

nged to off

2012 Jun 15 14:46:58 swi-svi00A %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/2, operational Transmit Flow Control state ch

anged to off

2012 Jun 15 14:46:58 swi-svi00A %ETHPORT-5-SPEED: Interface port-channel14, operational speed changed to 10 Gbps

2012 Jun 15 14:46:58 swi-svi00A %ETHPORT-5-IF_DUPLEX: Interface port-channel14, operational duplex mode changed to Full

2012 Jun 15 14:46:58 swi-svi00A %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel14, operational Receive Flow Control state

changed to off

2012 Jun 15 14:46:58 swi-svi00A %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel14, operational Transmit Flow Control state

changed to off

2012 Jun 15 14:47:05 swi-svi00A %UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Ethernet1/2, empty echo detected

2012 Jun 15 14:47:16 swi-svi00A %ETH_PORT_CHANNEL-5-PORT_SUSPENDED: Ethernet1/2: Ethernet1/2 is suspended

2012 Jun 15 14:47:16 swi-svi00A %ETHPORT-5-IF_TRUNK_UP: Interface Ethernet1/2, vlan 1,60,100,358,370,380,500-501,505,700-703,710

-713,720-723,730-735,759-762,764-765,767,770,775-778,782-783,787-788,794-796 up

2012 Jun 15 14:47:16 swi-svi00A %ETHPORT-5-IF_TRUNK_UP: Interface Ethernet1/2, vlan 999-1000,1501,2029-2030 up

2012 Jun 15 14:47:16 swi-svi00A %ETHPORT-2-IF_DOWN_ERROR_DISABLED: Interface Ethernet1/2 is down (Error disabled. Reason:UDLD em

pty echo)

2012 Jun 15 14:52:16 swi-svi00A %ETHPORT-2-IF_DOWN_ERROR_DISABLED: Interface Ethernet1/2 is down (Error disabled. Reason:UDLD em

pty echo)

==

swi-svi00A# sh udld ethernet 1/2

Interface Ethernet1/2

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

Port enable administrative configuration setting: enabled-aggressive

Port enable operational state: enabled-aggressive

Current bidirectional state: unknown

Current operational state:  disable-port - Multiple neighbor not detected

Message interval: 7

Timeout interval: 5

        Last pkt send on: 719482, Jun 15 14:47:05 2012

                Probe pkt send on: 401784, Jun 15 14:46:59 2012

                Echo  pkt send on: 461880, Jun 15 14:47:05 2012

                Flush pkt send on: 719482, Jun 15 14:47:05 2012

        Last pkt recv on: 719134, Jun 15 14:47:05 2012

                Probe pkt recv on: 719134, Jun 15 14:47:05 2012

                Echo  pkt recv on: None.

                Flush pkt recv on: None.

        Deep pkt inspections done: None.

        Mismatched if index found: None.

        Deep pkt inspection drops: None.

(Member of port-channel14)

3 Replies 3

Oleksandr Nesterov
Cisco Employee
Cisco Employee

Hi

Try to configure UDLD normal mode as it has less false-positive results and please check cables between N7k and N5k.

HTH,

Alex

Hi Alex

Reseating the Transceivers and Changing the cables didn't help.

After a reboot of the N5K UDLD works as expected (aggessive at N7K, normal at N5K).

Looks a little bite strange as nothing showed up in the N5K logs.

Edmund

KEVIN DELANEY
Level 1
Level 1

You are probably running into bug-id CSCtz00790. (see below)

I had the same issue with UDLD no echo reply over SFP+ cables. The bug is Fixed-In 5.1(3)N2(1a)

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtz00790