Nexus interface traffic keep droping

[cisjay]

I have cisco Nexus 3172T Chassis Im having problem with the traffic going in and out the interface, please let me know what I missed.

Thank you in advance.

From the logging:

%ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/43 is down (Link failure)

%ETHPORT-5-SPEED: Interface Ethernet1/43, operational speed changed to 100 Mbps

%ETHPORT-5-IF_DUPLEX: Interface Ethernet1/43, operational duplex mode changed to Full

%ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/43, operational Receive Flow Control state changed to off

%ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/43, operational Transmit Flow Control state changed to off

%ETHPORT-5-IF_UP: Interface Ethernet1/43 is up in mode access

%ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/43 is down (Link failure)

%ETHPORT-5-SPEED: Interface Ethernet1/43, operational speed changed to 10 Gbps

%ETHPORT-5-IF_DUPLEX: Interface Ethernet1/43, operational duplex mode changed to Full

Interface show run configuration:

interface Ethernet1/43

switchport access vlan 40

spanning-tree port type edge

spanning-tree bpduguard enable

Interface information

Ethernet1/43 is up

admin state is up, Dedicated Interface

Hardware: 100/1000/10000 Ethernet, address: 0078.8814.4e45 (bia 0078.8814.4e45)

MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, medium is broadcast

Port mode is access

full-duplex, 10 Gb/s

Beacon is turned off

Auto-Negotiation is turned on

Input flow-control is off, output flow-control is off

Auto-mdix is turned off

Switchport monitor is off

EtherType is 0x8100

EEE (efficient-ethernet) : n/a

Last link flapped 09:11:35

Last clearing of "show interface" counters never

961 interface resets

30 seconds input rate 20208 bits/sec, 3 packets/sec

30 seconds output rate 28264 bits/sec, 5 packets/sec

Load-Interval #2: 5 minute (300 seconds)

input rate 49.93 Kbps, 4 pps; output rate 691.72 Kbps, 15 pps

RX

1213890029 unicast packets 945318 multicast packets 8386637 broadcast packets

1223221984 input packets 732465807627 bytes

0 jumbo packets 0 storm suppression packets

0 runts 0 giants 0 CRC 0 no buffer

0 input error 0 short frame 0 overrun 0 underrun 0 ignored

0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop

0 input with dribble 0 input discard

0 Rx pause

TX

1751860499 unicast packets 63472041 multicast packets 96024336 broadcast packets

1911356876 output packets 2338325830578 bytes

0 jumbo packets

0 output error 0 collision 0 deferred 0 late collision

0 lost carrier 0 no carrier 0 babble 0 output discard

0 Tx pause

[cofee]

What do you have  connected to this port? It's possible that the device connected to it is triggering auto negotiation failures. I would suggest to hard code speed and duplex on the nexus port and the remote port. See if you still get the same error.

[cisjay]

Hi Cofee

The device that is connected to the interface is a PC 10gigabit nic... 

I will try to hard coding the interface and see if that will solve it.

[cisjay]

UPdate:

Hi So I hard coded the interface

I'm still seeing the package drops... the interface still flapping. but the renegotiation speed is not happening anymore. 

%ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/43, operational Receive Flow Control

state changed to off

 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/43, operational Transmit Flow Control state changed to off

ETHPORT-5-IF_UP: Interface Ethernet1/43 is up in mode access...

I can't anything wrong with the configuration... I am thinking it is the PC interface that causing the dropping. I will update you if I found out it is a PC interface... 

if you guys have any suggestion let me know.

Thank you

[cofee]

Did you hard code PC nic as well? if you haven't you would need to do that as well.

[cisjay]

Still drop after hard-coding the PC- NIC.. they are both on 10GB and full for duplex... but still the result.... the port is down twice a day

[Rakesh Tiwari]

Did you resolve the problem.pls help me also as facing same problem.

[Reza Sharifi]

It appears that you have issue with interface speed negotioantion.  Can you hard set the speed to be compatible to whatever device this interface is connected to (e.g speed 1000)?

HTH

[cisjay]

Hi Reza.

The device that is connected to the interface is a PC 10gigabit nic... 

I will try to hard coding the interface and see if that will solve it.

[cisjay]

UPdate:

Hi So I hard coded the interface

I'm still seeing the package drops... the interface still flapping. but the renegotiation speed is not happening anymore. 

%ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/43, operational Receive Flow Control

state changed to off

 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/43, operational Transmit Flow Control state changed to off

ETHPORT-5-IF_UP: Interface Ethernet1/43 is up in mode access...

I can't anything wrong with the configuration... I am thinking it is the PC interface that causing the dropping. I will update you if I found out it is a PC interface... 

if you guys have any suggestion let me know.

Thank you

[cisjay]

UPDATE:

So I did hard-coded both the switch port and PC nic to the same speed and duplex to full, and still not working....

I even change the switchport to another port and still a no go...

Any other ideas???

Thank you

[cofee]

Is it possible to change NIC or use another host that has a 10 gig port?that would rule out any issue with the remote NIC/host, since you have already tested the nexus side by using another port.

did you try replacing the patch cable ?

[motiar]

Hi Cisjay,

Did you solve the problem? I have faced the similar problem, Nexus vPC link keep droping the traffics.

Regards

Motiar

[Rakesh Tiwari]

Facing similar issue. pls suggest.

2022 Jul 18 15:37:36 N5K-SW-2 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet106/1/27 is down (Link failure)
2022 Jul 18 15:37:39 N5K-SW-2 %ETHPORT-5-SPEED: Interface Ethernet106/1/27, operational speed changed to 1 Gbps
2022 Jul 18 15:37:39 N5K-SW-2 %ETHPORT-5-IF_DUPLEX: Interface Ethernet106/1/27, operational duplex mode changed to Full
2022 Jul 18 15:37:39 N5K-SW-2 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet106/1/27, operational Receive Flow Control state changed to off
2022 Jul 18 15:37:39 N5K-SW-2 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet106/1/27, operational Transmit Flow Control state changed to on
2022 Jul 18 15:37:39 N5K-SW-2 %ETHPORT-5-IF_UP: Interface Ethernet106/1/27 is up in mode access
2022 Jul 18 15:37:55 N5K-SW-2 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet106/1/27 is down (Link failure)
2022 Jul 18 15:37:58 N5K-SW-2 %ETHPORT-5-SPEED: Interface Ethernet106/1/27, operational speed changed to 1 Gbps
2022 Jul 18 15:37:58 N5K-SW-2 %ETHPORT-5-IF_DUPLEX: Interface Ethernet106/1/27, operational duplex mode changed to Full
2022 Jul 18 15:37:58 N5K-SW-2 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet106/1/27, operational Receive Flow Control state changed to off
2022 Jul 18 15:37:58 N5K-SW-2 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet106/1/27, operational Transmit Flow Control state changed to on
2022 Jul 18 15:37:58 N5K-SW-2 %ETHPORT-5-IF_UP: Interface Ethernet106/1/27 is up in mode access
2022 Jul 18 15:38:17 N5K-SW-2 %VSHD-5-VSHD_SYSLOG_CONFIG_I: Configured from vty by admin on 172.16.5.180@pts/1
2022 Jul 18 15:38:35 N5K-SW-2 %VSHD-5-VSHD_SYSLOG_CONFIG_I: Configured from vty by on ppm.26516
2022 Jul 18 15:39:35 N5K-SW-2 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet104/1/42 is down (Link failure)
2022 Jul 18 15:39:39 N5K-SW-2 %ETHPORT-5-SPEED: Interface Ethernet104/1/42, operational speed changed to 1 Gbps
2022 Jul 18 15:39:39 N5K-SW-2 %ETHPORT-5-IF_DUPLEX: Interface Ethernet104/1/42, operational duplex mode changed to Full
2022 Jul 18 15:39:39 N5K-SW-2 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet104/1/42, operational Receive Flow Control state changed to off
2022 Jul 18 15:39:39 N5K-SW-2 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet104/1/42, operational Transmit Flow Control state changed to on
2022 Jul 18 15:39:39 N5K-SW-2 %ETHPORT-5-IF_UP: Interface Ethernet104/1/42 is up in mode access
2022 Jul 18 15:40:14 N5K-SW-2 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet104/1/42 is down (Link failure)
2022 Jul 18 15:40:17 N5K-SW-2 %ETHPORT-5-SPEED: Interface Ethernet104/1/42, operational speed changed to 1 Gbps
2022 Jul 18 15:40:17 N5K-SW-2 %ETHPORT-5-IF_DUPLEX: Interface Ethernet104/1/42, operational duplex mode changed to Full
2022 Jul 18 15:40:17 N5K-SW-2 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet104/1/42, operational Receive Flow Control state changed to off
2022 Jul 18 15:40:17 N5K-SW-2 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet104/1/42, operational Transmit Flow Control state changed to on
2022 Jul 18 15:40:17 N5K-SW-2 %ETHPORT-5-IF_UP: Interface Ethernet104/1/42 is up in mode access
2022 Jul 18 15:40:34 N5K-SW-2 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet104/1/42 is down (Link failure)
2022 Jul 18 15:40:37 N5K-SW-2 %ETHPORT-5-SPEED: Interface Ethernet104/1/42, operational speed changed to 1 Gbps
2022 Jul 18 15:40:37 N5K-SW-2 %ETHPORT-5-IF_DUPLEX: Interface Ethernet104/1/42, operational duplex mode changed to Full
2022 Jul 18 15:40:37 N5K-SW-2 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet104/1/42, operational Receive Flow Control state changed to off
2022 Jul 18 15:40:37 N5K-SW-2 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet104/1/42, operational Transmit Flow Control state changed to on
2022 Jul 18 15:40:37 N5K-SW-2 %ETHPORT-5-IF_UP: Interface Ethernet104/1/42 is up in mode access
2022 Jul 18 15:42:22 N5K-SW-2 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet104/1/42 is down (Link failure)
2022 Jul 18 15:42:26 N5K-SW-2 %ETHPORT-5-SPEED: Interface Ethernet104/1/42, operational speed changed to 1 Gbps
2022 Jul 18 15:42:26 N5K-SW-2 %ETHPORT-5-IF_DUPLEX: Interface Ethernet104/1/42, operational duplex mode changed to Full
2022 Jul 18 15:42:26 N5K-SW-2 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet104/1/42, operational Receive Flow Control state changed to off
2022 Jul 18 15:42:26 N5K-SW-2 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet104/1/42, operational Transmit Flow Control state changed to on
2022 Jul 18 15:42:26 N5K-SW-2 %ETHPORT-5-IF_UP: Interface Ethernet104/1/42 is up in mode access
2022 Jul 18 15:44:42 N5K-SW-2 %LIBIFMGR-5-ALL_COUNTERS_CLEARED: All interface counters cleared by user
2022 Jul 18 15:46:15 N5K-SW-2 %ETHPORT-5-SPEED: Interface Ethernet105/1/15, operational speed changed to 1 Gbps
2022 Jul 18 15:46:15 N5K-SW-2 %ETHPORT-5-IF_DUPLEX: Interface Ethernet105/1/15, operational duplex mode changed to Full
2022 Jul 18 15:46:15 N5K-SW-2 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet105/1/15, operational Receive Flow Control state changed to off
2022 Jul 18 15:46:15 N5K-SW-2 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet105/1/15, operational Transmit Flow Control state changed to on
2022 Jul 18 15:46:15 N5K-SW-2 %ETHPORT-5-IF_UP: Interface Ethernet105/1/15 is up in mode access
2022 Jul 18 15:46:29 N5K-SW-2 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet105/1/15 is down (Link failure)
2022 Jul 18 15:46:33 N5K-SW-2 %ETHPORT-5-SPEED: Interface Ethernet105/1/15, operational speed changed to 1 Gbps
2022 Jul 18 15:46:33 N5K-SW-2 %ETHPORT-5-IF_DUPLEX: Interface Ethernet105/1/15, operational duplex mode changed to Full
2022 Jul 18 15:46:33 N5K-SW-2 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet105/1/15, operational Receive Flow Control state changed to off
2022 Jul 18 15:46:33 N5K-SW-2 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet105/1/15, operational Transmit Flow Control state changed to on
2022 Jul 18 15:46:33 N5K-SW-2 %ETHPORT-5-IF_UP: Interface Ethernet105/1/15 is up in mode access

[MHM Cisco World]

issue not solve by hard coded speed and duplex alone, you need to disable auto nego too to make PC-NSK connect.