[c-nsp] Lot of input errors on a NPE-G1 interface

[Chris Gotstein]

First suggestion i would make is removing spanning-tree portfast from 
the switch config.

You can also try increasing your hold queue on the 7204 with the command:

hold-queue <length> in

The recommendation is to increase in small increments, so i would 
suggest starting with 100.

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080094791.shtml

On 5/23/2012 1:04 AM, gal.9430 at googlemail.com wrote:
> Hi,
>
> I've some trouble with a NPE-G1 interface connected to a Catalyst
> 2960G switch via multimode cable. Input errors increases very fast.
> Optics on both sides are original cisco. Average bandwidth is ~30-50
> Mbps, burst bandwidth ~80-100 Mbps for a short period.
>
> Configuration NPE-G1 interface:
> ----------------------------------------------
> interface GigabitEthernet0/1
>   ip address x.x.x.x 255.255.255.240
>   no ip proxy-arp
>   ip route-cache flow
>   duplex full
>   speed 1000
>   media-type gbic
>   negotiation auto
>   ipv6 address x:x:x::x/64
>   no cdp enable
>
> Configuration switch interface:
> --------------------------------------------
> !
> interface GigabitEthernet0/23
>   description Cisco7204VXR
>   switchport access vlan 250
>   switchport mode access
>   spanning-tree portfast
> !
>
> Uptime:
> -----------
> Router uptime is 9 hours, 14 minutes
> System returned to ROM by bus error at PC 0x621E0668, address
> 0x18680DD8 at 22:37:34 MET Tue May 22 2012
> System restarted at 22:40:33 MET Tue May 22 2012
> System image file is "disk2:c7200-adventerprisek9-mz.124-15.T13.bin"
>
> NPE-G1:
> ------------
> GigabitEthernet0/1 is up, line protocol is up
>    Hardware is BCM1250 Internal MAC, address is 0006.52f4.d81b (bia
> 0006.52f4.d81b)
>    Internet address is x.x.x.x/28
>    MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
>       reliability 255/255, txload 1/255, rxload 1/255
>    Encapsulation ARPA, loopback not set
>    Keepalive set (10 sec)
>    Full-duplex, 1000Mb/s, link type is autonegotiation, 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 never
>    Input queue: 0/75/1321/1 (size/max/drops/flushes); Total output drops: 0
>    Queueing strategy: fifo
>    Output queue: 0/40 (size/max)
>    5 minute input rate 4264000 bits/sec, 871 packets/sec
>    5 minute output rate 5859000 bits/sec, 1597 packets/sec
>       27479327 packets input, 3434822229 bytes, 0 no buffer
>       Received 941 broadcasts, 0 runts, 0 giants, 0 throttles
>       989 input errors, 0 CRC, 0 frame, 989 overrun, 0 ignored
>       0 watchdog, 17119 multicast, 0 pause input
>       0 input packets with dribble condition detected
>       43616309 packets output, 2243854018 bytes, 0 underruns
>       5 output errors, 0 collisions, 4 interface resets
>       561 unknown protocol drops
>       0 babbles, 0 late collision, 0 deferred
>       5 lost carrier, 0 no carrier, 0 pause output
>       0 output buffer failures, 0 output buffers swapped out
>
> Catalyst:
> --------------
> GigabitEthernet0/23 is up, line protocol is up (connected)
>    Hardware is Gigabit Ethernet, address is 04fe.7f65.2197 (bia 04fe.7f65.2197)
>    Description: Cisco7204VXR
>    MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
>       reliability 255/255, txload 1/255, rxload 1/255
>    Encapsulation ARPA, loopback not set
>    Keepalive not set
>    Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
>    input flow-control is off, output flow-control is unsupported
>    ARP type: ARPA, ARP Timeout 04:00:00
>    Last input never, output 00:00:01, output hang never
>    Last clearing of "show interface" counters never
>    Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
>    Queueing strategy: fifo
>    Output queue: 0/40 (size/max)
>    5 minute input rate 5582000 bits/sec, 1596 packets/sec
>    5 minute output rate 5445000 bits/sec, 1002 packets/sec
>       160765357185 packets input, 75815081907836 bytes, 0 no buffer
>       Received 580911 broadcasts (468086 multicasts)
>       0 runts, 0 giants, 0 throttles
>       5 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
>       0 watchdog, 468086 multicast, 343548 pause input
>       0 input packets with dribble condition detected
>       116641123524 packets output, 71833102673211 bytes, 0 underruns
>       0 output errors, 0 collisions, 0 interface resets
>       0 babbles, 0 late collision, 0 deferred
>       0 lost carrier, 0 no carrier, 0 PAUSE output
>       0 output buffer failures, 0 output buffers swapped out
>
> The last uptime was nearly 70 days and input errors round about 96k.
> Does anyone have an explanation for that?
>
>
> Thanks
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-- 
---- ---- ---- ----
Chris Gotstein, Network Engineer, U.P. Logon/Computer Connection U.P.
http://uplogon.com | +1 906 774 4847 | chris at uplogon.com