12-19-2012 07:34 AM - edited 03-07-2019 10:41 AM
Hi Everyone,
I have Printer connectd to switch port.
I saw input and CRC errors incrementing rapidly.
Switchport was flapping due to this.
I checked the port status it was auto negotiating on full duplex and speed 100.
I Replaced Lan Cable with good working cable.
Still errors were incrementing.
Then i did shut and no shut on port.
Then saw that swichport is now auto negotiating to
Full-duplex, 10Mb/s, media type is 10/100BaseTX
After this no input and CRC errors increment.
So is this possible that device can auto negotiate to different speeds when we reset the switch port?
Have anyone seen Input and CRC errors before due to speed mismtach?
Thanks
Mahesh
Solved! Go to Solution.
12-19-2012 12:34 PM
Hi Mahesh,
Full-duplex, 10Mb/s, media type is 10/100BaseTX
Mostly likely the printer is 10Mb. If it is not, can you check to see if it is set to auto?
Also, shut and no shut will not change the interface speed or negotiation unless the printer was turned of when you did the show interface.
Some times, if the connecting device to the switch port is turned off, you see
Auto-duplex
once the device is turned on it will change to:
Full-duplex
HTH
Reza
12-19-2012 02:02 PM
Full-duplex, 100Mb/s, media type is 10/100BaseTX
If you are getting line errors, why are you forcing the duplex and speed? I'd be thinking of setting both speed and duplex to auto.
Ok, so it's a 3560, then post the output to the command "sh controller e
switch is 3560
Like I've asked before, would be nice if you can specify the EXACT model of your switch (rather than you and me play a game of "20 questions"). And yes, the EXACT model will tell me if your switch will support TDR or not.
12-19-2012 06:23 PM
No line errors on the transmit but there are some FCS and Symbols error on the Receive side.
So my guess is the printer.
12-19-2012 07:49 AM
Hi mahesh ,
CRC will increase only the case when the Cable is bad or Device port issue , this is applicable either it is WAN or LAN .
If speed is mismatch device wont communicate at all .
if you need confirmation hardcode the switch port to 100 mbps and check.device wont work .
12-19-2012 07:54 AM
Hi,
DEvice was working fine with speed 10.
I did shut and no shut on port.
It is now auto negotiating to
Full-duplex, 100Mb/s, media type is 10/100BaseTX.
Will check if errors increment or not ?
Thanks
Mahesh
12-19-2012 09:54 AM
This is likely a bad cable. Setting your ports to 10Mbps will let you connect over sub optimal conditions.
Once on a wim, I terminated both ends of a spool of cat5e and tried passing data though it at 10Mbps. I was able to transfer files without error over an 800 foot loop, which is way out of spec.
Regards,
Greg
12-19-2012 11:49 AM
Hi Greg,
I have put that faulty cable to other switch port to see rule out cable issue
thanks
mahesh
12-19-2012 12:34 PM
Hi Mahesh,
Full-duplex, 10Mb/s, media type is 10/100BaseTX
Mostly likely the printer is 10Mb. If it is not, can you check to see if it is set to auto?
Also, shut and no shut will not change the interface speed or negotiation unless the printer was turned of when you did the show interface.
Some times, if the connecting device to the switch port is turned off, you see
Auto-duplex
once the device is turned on it will change to:
Full-duplex
HTH
Reza
12-19-2012 01:56 PM
Hi Reza,
Currently switch port is auto nego 100 full.
I check printer it is set to Auto.
Do you think it can be issue with switch port as sometimes switch port and printer negotiate speed of 10 and sometimes 100?
thanks
MAhesh
12-19-2012 01:08 PM
I agree with Reza.
Printers, the cheaper the worst, don't need 100 Mbps or 1Gbps speed. So the manufacturers commonly stick a very, very old 10 Mbps, Half duplex NIC card in order to keep the cost down.
Post the output to the following commands:
1. sh int
2. sh controll e
What is the exact model of your switch?
12-19-2012 01:47 PM
Hi,
I did shut and no shut few hours ago currently switch port is working fine.
This time it negotiated to 100 full
MTU 1500 bytes, BW 100000 Kbit, 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, media type is 10/100BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters 05:43:40
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 46000 bits/sec, 13 packets/sec
5 minute output rate 9000 bits/sec, 10 packets/sec
96601 packets input, 113767361 bytes, 0 no buffer
Received 2 broadcasts (2 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 2 multicast, 0 pause input
0 input packets with dribble condition detected
109474 packets output, 42741612 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
switch is 3560
It has only option for
sh controllers fastEthernet 0/41 utilization
Receive Bandwidth Percentage Utilization : 0
Transmit Bandwidth Percentage Utilization : 0
Seems issue was with printer NIC as sometimes it negotiate to speed 10 sometimes to 100
thanks
mahesh
12-19-2012 02:02 PM
Full-duplex, 100Mb/s, media type is 10/100BaseTX
If you are getting line errors, why are you forcing the duplex and speed? I'd be thinking of setting both speed and duplex to auto.
Ok, so it's a 3560, then post the output to the command "sh controller e
switch is 3560
Like I've asked before, would be nice if you can specify the EXACT model of your switch (rather than you and me play a game of "20 questions"). And yes, the EXACT model will tell me if your switch will support TDR or not.
12-19-2012 02:38 PM
Hi,
Here is info:
WS-C3560-48PS
sh controllers ethernet-controller fastEthernet 0/41
Transmit FastEthernet0/41 Receive
2296133052 Bytes 2943368241 Bytes
27390447 Unicast frames 14698022 Unicast frames
12669617 Multicast frames 11824 Multicast frames
24333358 Broadcast frames 44802 Broadcast frames
0 Too old frames 2932196653 Unicast bytes
0 Deferred frames 7742602 Multicast bytes
0 MTU exceeded frames 2871363 Broadcast bytes
0 1 collision frames 2 Alignment errors
0 2 collision frames 118 FCS errors
0 3 collision frames 0 Oversize frames
0 4 collision frames 0 Undersize frames
0 5 collision frames 1 Collision fragments
0 6 collision frames
0 7 collision frames 6790486 Minimum size frames
0 8 collision frames 3455001 65 to 127 byte frames
0 9 collision frames 3086584 128 to 255 byte frames
0 10 collision frames 474760 256 to 511 byte frames
0 11 collision frames 22899 512 to 1023 byte frames
0 12 collision frames 925333 1024 to 1518 byte frames
0 13 collision frames 0 Overrun frames
0 14 collision frames 0 Pause frames
0 15 collision frames
0 Excessive collisions 295 Symbol error frames
0 Late collisions 0 Invalid frames, too large
0 VLAN discard frames 0 Valid frames, too large
0 Excess defer frames 1 Invalid frames, too small
20539871 64 byte frames 0 Valid frames, too small
21411253 127 byte frames
5014351 255 byte frames 0 Too old frames
1082141 511 byte frames 0 Valid oversize frames
377421 1023 byte frames 0 System FCS error frames
15968385 1518 byte frames 0 RxPortFifoFull drop frame
0 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames
this switch does not support TDR as i tried that already
Both sides are set to auto auto.
Currently switch port is auto nego 100 full.
I check printer it is set to Auto.
Do you think it can be issue with switch port as sometimes switch port and printer negotiate speed of 10 and sometimes 100?
12-19-2012 06:23 PM
No line errors on the transmit but there are some FCS and Symbols error on the Receive side.
So my guess is the printer.
12-20-2012 07:03 AM
Hi Leolaohoo,
I checked today
sh controllers ethernet-controller fa0/41
Transmit FastEthernet0/41 Receive
2310321370 Bytes 3076541953 Bytes
27467545 Unicast frames 14806113 Unicast frames
12712679 Multicast frames 11824 Multicast frames
24356938 Broadcast frames 44802 Broadcast frames
0 Too old frames 3065370365 Unicast bytes
0 Deferred frames 7742602 Multicast bytes
0 MTU exceeded frames 2871363 Broadcast bytes
0 1 collision frames 2 Alignment errors
0 2 collision frames 118 FCS errors
0 3 collision frames 0 Oversize frames
0 4 collision frames 0 Undersize frames
0 5 collision frames 1 Collision fragments
0 6 collision frames
0 7 collision frames 6795392 Minimum size frames
0 8 collision frames 3455169 65 to 127 byte frames
0 9 collision frames 3086929 128 to 255 byte frames
0 10 collision frames 477340 256 to 511 byte frames
0 11 collision frames 22932 512 to 1023 byte frames
0 12 collision frames 1025392 1024 to 1518 byte frames
0 13 collision frames 0 Overrun frames
0 14 collision frames 0 Pause frames
0 15 collision frames
0 Excessive collisions 295 Symbol error frames
0 Late collisions 0 Invalid frames, too large
0 VLAN discard frames 0 Valid frames, too large
0 Excess defer frames 1 Invalid frames, too small
20655112 64 byte frames 0 Valid frames, too small
21432331 127 byte frames
5014394 255 byte frames 0 Too old frames
1083196 511 byte frames 0 Valid oversize frames
382596 1023 byte frames 0 System FCS error frames
15969533 1518 byte frames 0 RxPortFifoFull drop frame
0 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames
Errors are not incrementing.
Thanks
Mahesh
12-21-2012 01:12 PM
Hi,
Many thanks for all the help.
Regards
Mahesh
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