01-16-2010 09:55 PM - edited 03-06-2019 09:19 AM
Hi all,
I have 2650 XM Router connected to Cable modem.
It has input errors.
i changed cable also still same thing.errors do not stop.
sh int fa0/0
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is 000f.8f6d.7e60 (bia 000f.8f6d.7e60)
Internet address is
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
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: 0/75/2/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 14000 bits/sec, 30 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
111292 packets input, 6907618 bytes
Received 109236 broadcasts, 0 runts, 0 giants, 0 throttles
4077 input errors, 0 CRC, 0 frame, 0 overrun, 4077 ignored
0 watchdog
0 input packets with dribble condition detected
2058 packets output, 184333 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
0 output buffer failures, 0 output buffers swapped out
any idea how can i get rid of these errors
thanks
mahesh
Message was edited by: mahesh18
01-16-2010 10:12 PM
Hi Mahesh,
4077 packets have been 'ignored' by the interface because the interface hardware ran low on internal buffers.
Input Error includes runts, giants, no buffer, CRC, frame, overrun, and ignored counts. Other input-related errors can also cause the input errors count to be increased, and some datagrams can have more than one error. Therefore, this sum cannot balance with the sum of enumerated input error counts.
Just try shut and no shut the port and hard code the duplex/speed setting at both ends of router and modem.
HTH
Regards
Ganesh.H
01-16-2010 10:19 PM
Hi,
How can i hardcode on cable modem?
also when i hard code on router interface then crc errors got started.
thanks
mahesh
01-16-2010 10:53 PM
Hi Mahesh,
Ok then try with auto what negotition it takes just check if it takes 10 Mbps and full duplex then in modem you need to configure full duplex with 100 Mbps setting.
HTH
Regards
Ganesh.H
01-16-2010 11:07 PM
Hi,
fa0/0 is already config with auto auto
duplex auto
speed auto
thanks
mahesh
01-16-2010 11:18 PM
Hi Mahesh,
If your switch supports TDR, use the "test cable-diagnostics tdr" command.
and check out the below link on ethernet collision troubleshooting hope this helps out your query!!
http://www.cisco.com/en/US/products/hw/modules/ps2033/products_tech_note09186a008009446d.shtml
Regards
Ganesh.H
01-16-2010 11:27 PM
Hi Ganesh,
problem is with wan interface of router that connects to cable modem
no switch involved
int fa0/0 goes to ISP cable modem
thanks
mahesh
01-16-2010 11:30 PM
here it is what i did from router
#test int fastEthernet 0/0
U.U Failed - timeout problem
1 interfaces: 0 passed, 1 failed, 0 skipped, 0 untestable
01-16-2010 11:37 PM
Hi Mahesh,
Use the 'clear counters' command to reset the counters and monitor the interface parameters over time (less than 24 hours).
Monitor the ignored packets over time. If they are increasing, paste the output from the 'show buffers' command to see if the buffers can be tuned. Also, compare with the 'no buffer' counter and input/output queue drops. Broadcast storms can cause the 'ignored' counter to increment.
HTH
Regards
Ganesh.H
01-16-2010 11:42 PM
hi ganesh
i will follow ur recommendations
thanks
mahesh
01-17-2010 09:33 AM
Most cable modems only know auto for speed/duplex , make sure the router speed/duplex is also set as auto for speed/duplex . Clear counters then see if that helps.
01-17-2010 10:14 PM
hi glen
thanks for reply.
my router int is set to aut auto.
duplex auto
speed auto
i have cleared the counters and i am monitoring it now.
is there anything i can check ?
thanks
mahesh
01-07-2011 07:15 AM
Hi all,
now the interface fa0/0 flapped few times theni saw lost carrier error on the interface.
then i replaced the lan cable.
since then no errors
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
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 1d13h
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 11000 bits/sec, 22 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
3456425 packets input, 1634130700 bytes
Received 2344447 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
790814 packets output, 90767572 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
0 output buffer failures, 0 output buffers swapped out
i am monitoring it now
01-07-2011 03:14 PM
Hi all,
i check the interface after i replace the cable now it shows 38 lost carrier ***********************
Internet address is 96.51.139.43/22
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
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 1d21h
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 13000 bits/sec, 22 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
4012393 packets input, 1669567741 bytes
Received 2899454 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
795364 packets output, 91329142 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
38 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Any ideas what i can do next?
thanks
01-07-2011 03:22 PM
Also i check my router 2650xm logs and found that
Jan 7 14:15:15.789 MST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down
Jan 7 14:15:20.261 MST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
2650XM# sh int desc
Interface Status Protocol Description
Fa0/0 up up WAN Connection to ISP modem
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: