interface0/1/1 flapping /Significant interface CRC /input errors

[AHMADJ]

TenGigabitEthernet0/1/1 (21.1%)

248046 input errors, 208123 CRC, 0 frame, 0 overrun, 0 ignored

interface TenGigabitEthernet0/1/1
description +++ Connected to AM-CORE-B Te1/9 +++
ip flow monitor BRANCH_TUNNELS_MONITOR input
ip flow monitor BRANCH_TUNNELS_MONITOR output
ip address 10.231.24.58 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip ospf message-digest-key 1 md5 <removed>
ip ospf network point-to-point
ip ospf cost 11
load-interval 30
service-policy input AV-SCCM-SERVER-LIMIT-POLICY
service-policy output CENFS-BR-OUT-LIMIT-POLICY

[Seb Rupik]

HI there,

CRC errors are most likely caused by Layer1 issues (although can be Layer2 also). Swap the fibre cable reset the interface counters and check back after a short period of time.

cheers,

Seb.

[AHMADJ]

Hi

I already swaaped the fiber and changed the cable and sfp

Thanks
Ahmad jabali

[Seb Rupik]

What does the configuration and interface stats look like for AM-CORE-B Te1/9  ?

[Georg Pauwen]

Hello,

what device is connected on the other side ? Are the crc/input errors showing on the interface on the other side of the link as well ?

[AHMADJ]

interface Ethernet1/9                                                                              

  description +++ Connected to AM-MPLS-HUB-01 (ETC) Te0/1/1 +++                                   

  no cdp enable                                                                                   

  flowcontrol receive on                                                                           

  flowcontrol send on                                                                             

  beacon                                                                                          

  ip flow monitor Netflow-Monitor-1 input sampler NF-Sampler-1                                    

  ip flow monitor Netflow-Monitor-1 output sampler NF-Sampler-1                                   

  no ip redirects                                                                                 

  ip address X.X.24.57/30                                                                      

  ip ospf authentication message-digest                                                            

  ip ospf message-digest-key 1 md5 3 843ec881d2fe32374934a55d307c6bbf                             

  ip ospf cost 11                                                                                 

  ip ospf network point-to-point                                                                  

  ip router ospf 1 area 0.0.0.0                                                                   

  no shutdown   

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

Ethernet1/9 is down (linkFlapErrDisabled, port: error)                                             

admin state is up, Dedicated Interface                                                             

  Hardware: 10000 Ethernet, address: e8ed.f338.0446 (bia e8ed.f33b.2938)                           

  Description: +++ Connected to AM-MPLS-HUB-01 (ETC) Te0/1/1 +++                                   

  Internet Address is X.X.24.57/30                                                              

  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 routed                                                                              

  auto-duplex, 10 Gb/s, media type is 10G                                                          

  Beacon is turned on                                                                              

  Auto-Negotiation is turned off                                                                   

  Input flow-control is on, output flow-control is on                                              

  Auto-mdix is turned off                                                                          

  Rate mode is dedicated                                                                           

  Switchport monitor is off                                                                        

  EtherType is 0x8100                                                                              

  EEE (efficient-ethernet) : n/a                                                                   

  Last link flapped 6d10h                                                                          

  Last clearing of "show interface" counters 51w5d                                                 

  5029 interface resets                                                                            

  Load-Interval #1: 30 seconds                                                                     

    30 seconds input rate 0 bits/sec, 0 packets/sec                                                

    30 seconds output rate 0 bits/sec, 0 packets/sec                                               

    input rate 0 bps, 0 pps; output rate 0 bps, 0 pps                                              

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

    300 seconds input rate 0 bits/sec, 0 packets/sec                                               

    300 seconds output rate 0 bits/sec, 0 packets/sec                                              

    input rate 0 bps, 0 pps; output rate 0 bps, 0 pps                                              

  L3 in Switched:                                                                                  

    ucast: 2091981 pkts, 1383977706 bytes - mcast: 16498193 pkts, 4312241758 bytes                 

  L3 out Switched:                                                                                 

    ucast: 37248396 pkts, 9009221435 bytes - mcast: 0 pkts, 0 bytes                                

  RX                                                                                               

    2160817 unicast packets  18044266 multicast packets  839 broadcast packets                    

    20199042 input packets  5954344912 bytes                                                      

    0 jumbo packets  0 storm suppression packets                                                  

    0 runts  0 giants  0 CRC/FCS  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                                                                                               

    48630582 unicast packets  3933970 multicast packets  14948 broadcast packets                  

    52569883 output packets  13724840322 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                                                                                    

[Giuseppe Larosa]

Hello Ahmad,

the other device is likely a Nexus platform from interface naming.

>> Ethernet1/9 is down (linkFlapErrDisabled, port: error)

>> Last link flapped 6d10h

On the Nexus side there are no input errors at all but in the past the port has flapped and you have disabled protection from flapping.

>>

0 runts 0 giants 0 CRC/FCS 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

Have you tried to change the SFP optics also on the Nexus side?

Hope to help

Giuseppe