Seeing errors incrementing on the interface

[SACHIN SHARMA]

we see errors incrementing on our gig interface connected to router ,this is our mpls circuit and ethernet handoff. Provider had fiber till demarcation point and and terminated on media converter .Provider tested their fiber connectivity and found no issues and vendor tested customer cable connectivity from demarc and found no issues.

any help is appreciated.

 interface GigabitEthernet0/0
  no ip address
 load-interval 30
 duplex full
 speed 100
 media-type rj45
 service-policy output QOS-MPLS-OUT
end

  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 253/255, txload 3/255, rxload 12/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is RJ45
  output flow-control is XON, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 05:21:53
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: Class-based queueing
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/2/256 (active/max active/max total)
     Reserved Conversations 6/6 (allocated/max allocated)
     Available Bandwidth 55000 kilobits/sec
  30 second input rate 4842000 bits/sec, 1223 packets/sec
  30 second output rate 1265000 bits/sec, 1101 packets/sec
     24299714 packets input, 3780186245 bytes, 0 no buffer
     Received 0 broadcasts, 384693 runts, 0 giants, 0 throttles
 

[SANTHOSHKUMAR SARAVANAN]

Hi,

    1) Check for fiber signal loss , look like fiber attenuation at your end  (before connecting to media converter). 

  2) ensure speed & duplex settings at both provider & your end are same , similarly for MTU settings .

  3) though i see more runt & reliability not good , suspecting issue at physical layer .  

terminated on media converter .Provider tested their fiber connectivity and found no issues and vendor tested customer cable connectivity from demarc and found no issues.

  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 253/255, txload 3/255, rxload 12/255

Received 0 broadcasts, 384693 runts, 0 giants, 0 throttles

http://www.cisco.com/c/en/us/support/docs/optical-networking/ons-15454-sonet-multiservice-provisioning-platform-mspp/27042-max-att-27042.html

Table 1 – For Wavelength 1310nm

	Attenuation/ Km (dB/Km)	Attenuation/optical connector (dB)	Attenuation/joint (dB)
Min	0.3	0.4	0.02	Best Conditions
Average	0.38	0.6	0.1	Normal
Max	0.5	1	0.2	Worst situation

Table 2 – For Wavelength 1550nm

	Attenuation/ Km (dB/Km)	Attenuation/optical connector (dB)	Attenuation/joint (dB)
Min	0.17	0.2	0.01	Best Conditions
Average	0.22	0.35	0.05	Normal
Max	0.4	0.7	0.1	Worst situation

Here is an example of a typical situation in the field:

kindly let me if you need further help 

HTH

sandy