[c-nsp] Lot of input errors on a NPE-G1 interface
Chris Gotstein
chris at uplogon.com
Wed May 23 12:30:01 EDT 2012
From Cisco:
Caution: An increase in the hold queue can have detrimental effects on
network routing and response times. For protocols that use SEQ/ACK
packets to determine round-trip times, do not increase the output queue.
Dropping packets instead informs hosts to slow down transmissions to
match available bandwidth. This is generally better than duplicate
copies of the same packet within the network, which can happen with
large hold queues.
Start small, i won't go much over 100, maybe 150. Clear counters and
see what the stats look like after you make the change.
On 5/23/2012 11:25 AM, gal.9430 at googlemail.com wrote:
> Hi Chris,
>
> thx for pointing this out! But what happened if I increase the hold-queue
> from 75 (default) to 200 or 400?
>
>
> On Wed, May 23, 2012 at 5:18 PM, Chris Gotstein<chris at uplogon.com> wrote:
>> 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
>>> _______________________________________________
>>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>>
>> --
>> ---- ---- ---- ----
>> Chris Gotstein, Network Engineer, U.P. Logon/Computer Connection U.P.
>> http://uplogon.com | +1 906 774 4847 | chris at uplogon.com
>> _______________________________________________
>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
--
---- ---- ---- ----
Chris Gotstein, Network Engineer, U.P. Logon/Computer Connection U.P.
http://uplogon.com | +1 906 774 4847 | chris at uplogon.com
More information about the cisco-nsp
mailing list