many input errors 7200

[Robo123]

hi Team,

i have 7200 chassi in that where Gi6/0 interface is genarating High input errors.

show int gi6/0 | i error

2353591 input error,4695overrun,2348896 ignored

kindly suggest on the above.

[Reza Sharifi]

Hi,

Have you replaced the cable?

HTH

[Robo123]

hi Reza,

yes i have done the same but still inputerroe is increasing 

GigabitEthernet6/0 is up, line protocol is up 

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 4/255

30 second input rate 16730000 bits/sec, 4477 packets/sec
30 second output rate 6731000 bits/sec, 2702 packets/sec
1038762980 packets input, 628305209 bytes, 0 no buffer

Total output drops: 1053

  2361301 input errors, 0 CRC, 0 frame, 4695 overrun, 2356606 ignored

Please check on the above.

[PaulP]

How is the CPU performing in the last 72h?

Post the output of the following

Show run int gi6/0

Show int gi6/0

Show ip in gi6/0

Is there a policy-map applied to the control-plane?

[Robo123]

interface GigabitEthernet6/0
description *** PRI_IOR-CC1-Port NO ****
ip address <ip address>
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip flow egress
ip pim sparse-mode
ip igmp static-group 239.1.1.1
ip cgmp
ip ospf network broadcast
ip ospf 100 area <area no>
ip ospf cost 20
load-interval 30
negotiation auto
no cdp enable
service-policy input Wipro-MPLS-QOS
service-policy output Wipro-MPLS-QOS-IN
hold-queue 8192 in

GigabitEthernet6/0 is up, line protocol is up
Hardware is WISEMAN, address is 0015.f9a9.45a8 (bia 0015.f9a9.45a8)
Description: *** PRI_IOR-CC1-Port NO ****
Internet address is <Ip address >
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 4/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full Duplex, 1000Mbps, link type is auto, media type is SX
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 1d11h
Input queue: 0/8192/0/0 (size/max/drops/flushes); Total output drops: 1053
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 16730000 bits/sec, 4477 packets/sec
30 second output rate 6731000 bits/sec, 2702 packets/sec
1038762980 packets input, 628305209 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
2361301 input errors, 0 CRC, 0 frame, 4695 overrun, 2356606 ignored
0 watchdog, 690257 multicast, 0 pause input
880716277 packets output, 2904384099 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 66346 pause output
0 output buffer failures, 0 output buffers swapped out

Is there a policy-map applied to the control-plane?No

i can observe cpu was high at peak hrs

%SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU Utilization(Total/Intr): 80%/75%, Top 3 processes(Pid/Util):  5/3%, 267/0%, 50/0%

[Leo Laohoo]

SFP of the remote end is faulty.

[Robo123]

Hi Leo,

thanks for the response.

SFP of the remote end is faulty.? not sure .

so as a first level trouble shoot what we can perform apart from cable change?

what is "66346 pause output" error?

is overrun is related to " capability of the interface , if it execeeding  the solution is only rate that frames are coming should be controlled at the remote end of the connection. Otherwise, if the number of overruns is high, the hardware should be upgraded. "?

is it related to traffic?

Please clarify the above...

[Robo123]

SFP of the remote end is faulty.? not sure .

[Leo Laohoo]

Look at the output to the command "sh interface GigabitEthernet6/0". It shows INPUT errors. This means, potentially, CRC or FCS line errors. Either one means the remote end is sending corrupted packets.

The same command tells me that it's a multi-mode SFP. So adding all the stuffs up, I'd still say the remote end SFP is faulty.

[Robo123]

Hi leo,

I will check the recomented things and will keep you posted by tomorrow EOD.

[Robo123]

Hi leo,

i have changed the cable and checked the SFP but still errors are occuring .also in show log am able to see the CPU high alam some time.Please help and let me know how can i proceed further to resolve this issue.

[Leo Laohoo]

What is the distance of the downstream device to the SFP port?

[Joseph W. Doherty]

What NPE? What model 7200? Populated with what modules?

There's also a chance you're hardware cannot keep up with gig bursts. Your later posting of high CPU shows your 7200 is rather "busy".

BTW, a duplex gig stream could require up to (about) 3 Mpps. Consider the NPE-1G provides up to 1 Mpps and the -2G provides up to 2 Mpps, gig interfaces, on 7200s, can be potential performance problems?

[Robo123]

Hi Joseph,

NPE-G1 is using in the device.

Cisco 7206VXR is the exact model .

and module 6 part "PA-1GE= " where we are getting the input error.

So you are pointing as the CPU is also cause for this issue?

As in logs i can observe the cpu utilization was high at lot of times it was arround 82%/78%,

Please clarify ..?