Cisco :: 3560 Not Showing CRC And Input Errors In Logging
Oct 21, 2012
I ran into a problem a few weeks ago and am still trying to figure out why either the 3560 switch or our Cacti syslog server did not alert us when one of our ports was experiencing heavy CRC and Input errors.
I had upgraded the IOS to 12.2(55)SE6 and rebooted the switch. About a week later, someone was troubleshooting why print jobs were having problems printing to a high speed printer. When I looked at the interface it showed a few thousand CRC and Input errors. I cleared the counters and had them print again and watched as the CRC and Input errors went up. When I did a "show log" there were no error messages. Looking at our Cacti Syslog there were also no errors present for the past 6 months.
We found that the device on the port was set to auto speed and duplex and the switch port was at 100/Full. Once we got them to match the problem was resolved, but we were left wondering why we never got any alerts.
We also have some 3548 and 3550 model switches that Cacti picks up %LINK-4-ERROR for any ports that show CRC and Input errors. I did some research and it appears that the 3560 switches do not have the LINK facility code. I believe it has been replaced with a PHY link code but I'm not sure. We do have some "%PHY-4-EXCESSIVE_ERRORS: Excessive FCS, data, or idle word errors found" but they are all for 3750 switches. I could not find any 3560 that had alerted for that error or the LINK error.
I also tripped port security on the 3560 switch just to make sure that it was reporting correctly to Cacti and that alert did show up.
My question is how do I get a 3560 switch to alert in the logging buffer for CRC/Input/FCS errors? Also, how I can generate CRC and Input errors on purpose for testing? I tried mismatching the speed/duplex/Auto and only got collissions, no CRC or Input errors.
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Nov 4, 2011
I use an 1841 router as an internet facing firewall with a 10MB MetroE connection. Lately users started reporting slow internet download speeds and web pages timing out. Bandwidth reports do not show the link as being saturated so I looked at the interfaces on the 1841. The interface connected to the provider shows OK as far as errors but the LAN side of the router shows steadily increasing input errors. It doesn't show any other errors, no CRC, frame, runts, giants or overruns, just generic input errors. What type of errors are those? Nothing is being logged on the console.
I moved the connection to another switch ports and the errors continue. I switched it down to 10MB and also changed the switch and the errors slow down but don't stop. Interestingly, the switch side never shows any errors. What can I do here? I guess it can be a bad interface but that is such a rare thing that I am hesitant to replace the router.
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May 11, 2011
My router, a Cisco 7204 with NPE 300, is experiencing output drops and input errors on a fastethernet interface. I have a 100Mbps connection with less than 15Mbps utilization at peak times.
FastEthernet1/0 is up, line protocol is up Hardware is DEC21140, address is 0014.a985.1a1c (bia 0014.a985.1a1c) Internet address is 38.102.66.134/30 MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, reliability 255/255, txload 3/255, rxload 1/255
[Code]....
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Apr 16, 2013
We are facing since one month in our two Cisco WS-C3750G-12S on many interfaces input errors when data transer or ping (ICMP) increase input erros. Not only port 1 but many interface has same issue, i have change new IOS but still same issue, once i have erase startup config but same issue we are facing and finaly i have replace same new switch with the same IOS it's working fine.(c3750-ipservicesk9-mz.122-55.SE4.bin) [code]
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Feb 26, 2013
My Expertise with Cisco ASA is Very less. I have observed Input errors in a Couple of Interfaces in Cisco ASA 5540 Firewall. [code] I need to Clear the Input errors on this particular Interface.Will Clear interface GigabitEthernet 0/0 will work?
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Jul 1, 2012
I am not sure why the CRC and input errors are increasing in fastethernet port...This port is used as Intradomain cross connect to Data Center service provider for LAN extension between two Data Centers in different locations... The link is 100 MB. The switch port is directly connected to patch panel of DC provider and I believe they have some L3 switch or some other device that is providing LAN extension...
#sh interfaces fastEthernet 0/23
FastEthernet0/23 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0019.3050.1497 (bia 0019.3050.1497)
Description: ASA_VPN_TO
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
[code]....
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Dec 5, 2011
I'm using a Cisco 1812 to route traffic from a small location with 10 users.. Users are complaning about packet loss, and programs with live database connection is freezing..On the router i've checked one of the Fastethernet interfaces, and I can see that the input errors are increasing constantly. [code]
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Nov 16, 2009
Why packets overrun are incrementing on the ASA even when I've only 40Mbps of throughput traffic?All interface are 1000- Full Duplex, both on ASA and on Catalyst3750.I've test the ASA5540 generating GET HTTP, about 40Mbit of traffic.When I use one ingress interface and one egress interface, interface input overrun counter is zero.When I use the same traffic with 3 ingress interfaces(slot0) and 3 egress interfaces(slot1), interface input overrun counter increase(60k overrun in only 2 minutes).
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Oct 2, 2012
I am not sure why the CRC and input errors are increasing in fastethernet port...This port is used as Intradomain cross connect to Data Center service provider for LAN extension between two Data Centers in different locations... The link is 100 MB. The switch port is directly connected to patch panel of DC provider and I believe they have some L3 switch or some other device that is providing LAN extension...
#sh interfaces fastEthernet 0/23
FastEthernet0/23 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0019.3050.1497 (bia 0019.3050.1497)
[Code].....
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Feb 22, 2012
I have this output from show interfaces command for the fastethernet interface on a 2811 router.
find the causes of the crc and the ignored input errors on the interface?
The interface configuration is:
interface FastEthernet0/0description VLANS_CHILE
no ip address
[Code]....
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Mar 15, 2013
I have an ASR 1002x connected to a 6513. Connection is from ASR Gig Copper SFP to 6513 Copper 10/100/1000 port. The ASR is recevinig Runt and input errors. I have removed the negotiation auto command on both boxes and hard coded the speed etc and still errors occur. I have also added the negotiation auto to both devices and also removed it with out hard coding the speed at and same results. Everytime I have seen these errors is has been to collision caused by a duplex mismatch.
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Mar 11, 2013
I have an odd situation where I cannot get a device connected to a built in switchport with out input and crc errors. When connecting to a GLC-T sfp it works fine.Here is my test layout
Outdoor wireless AP --- 10' of cat6 cable --- Gigabit POE injector --- 10' Cat6 cable --- 3560G port 48. (input and crc errors)
When I do this there are input and crc errors on the switch port. This has been confirmed on three different switches and three different outdoor AP's. We though at first it was the injector, but when we run the same setup, but instead connect the device to port 49 with a GLC-T sfp there are no errors.
Outdoor wireless AP --- 10' of cat6 cable --- Gigabit POE injector --- 10' Cat6 cable --- 3560G port 49 (GLC-T). (No errors)
I have upgraded the 3560G to the latest ios and still it has the same problem. If I run the same setup to a 2960 there are no errors at all.
Outdoor wireless AP --- 10' of cat6 cable --- Gigabit POE injector --- 10' Cat6 cable --- 2960 port g0/1 (No errors)
I have also tried manually setting the speed on the 3560G with no success.
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May 10, 2012
I have an issue with input errors, overruns, and input reset drops on the inside interface of an 5580-40 (v8.2.5: Transparent mode) The box is not stressed at all according to the 'show' commands in the Cisco troubleshooting performance document for PIX/ASA v8.2.5. Nothing stands out because is pretty much normal, nothing (processes, RAM, blocks, IO...) really being highly utilized. I have replaced the 10Gig card and that seemed to work because the rate of errors has gone down tremedously. The next step is to RMA the whole box.My question is what would be the cause of the inside interface to stop processing traffic (I say that because the syslog server stops receiving messages) for some periods of 30 seconds periodically throughout the day and clients lose their connections (ie Outlook, IBM Sametime, Oracle, MSSQL..etc). Can the issue be somewhere related to the overruns and input errors?
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Oct 21, 2012
I have been making effort to solve frequent input errors of module interface(WS-X4548-GB-RJ45) in our Backbone Switch(Cat4506).Let me show you show interface information.Rx-No-pkt-buff value is increased continuously even though traffic rate of interfaces is lower than 20Mbps.We have two Backbone Switch which is operated by HA via HSRP.What bring buffer shortage to our network ? [code]
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Jan 2, 2012
I have set the RV042 up for QuickVPN access. The router config recommends turning HTTPS on in the firewall when using QuickVPN. The side effect to this is any web browser throws me certificate errors and warns me not to continue logging in to the router's config. How do I fix this so the browser does not throw these messages?
Router is Linksys-branded, using latest firmware for this hardware (1.3.13.02-tm)
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Sep 18, 2012
We have a design of two 6509 running in a VSS with dual supervisor each having fthree 10/100/1000mb etherner modules. We have diagnosed a wierd problem that none of the switchports in module 1 and 2 on either switches are having layer2/layer 3 connectivity.
Tried everything from changing the cables to changing the end device but no luck with it.
Module results show pass and no errors in the logging.
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May 28, 2013
By default there 2 input queues. 2nd is priority queue and has 10% of link assigned. Weights for two queues are 4 and 4. For example we have 1Mbps link. ANd we also have saturated link with voice and other traffic. Will voice get 550k bandwidth? As I undestood 100k is assigned to voice strictly. Remaining 900k is evenly divided by two queues according to 4 and for ratio.
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Dec 4, 2011
No date in the TOP-N Interface Errors portlet showing in LMS 4.1, but data for TOP-N Interface Utilization is displayed like expected. The Interface Errors poller show active(without errors) with same Instances as Interface Utilization.
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Feb 10, 2012
I feel that 3560 and 3750 perform differently with the following two commands:
srr-queue bandwidth shape 5 0 0 0
srr-queue bandwidth limit 50
On 3750, the bandwidth for queue 1 is limited to 100mbps x 50% / 5 = 10mbps
On 3560, the bandwidth for queue 1 is limited to the smaller value of BW / shape weight and BW x limit%.
Does it sound about right? is there a way to check for mls qos input queue drops? The show mls qos interface xxx stat only shows the output queue drops. Maybe for some reason the input queue never drops?
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Oct 16, 2012
We have a stack of 4 Cisco WS-3750G-24TS with Sw Version 12.2(52) SE and giving weird errors:-
-Traceback= 17211C8 16FA4C0 16FA4FC 18625E4 18608D4 286A850 283E6FC 282EDF4 2859BBC 1B2EDA8 1B25878
Oct 17 22:26:48 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.7
Oct 17 22:26:50 AEDT: %SYS-3-CPUHOG: Task is running for (2098)msecs, more than (2000)msecs (8/6),process = SNMP ENGINE.
-Traceback= 172108C 17211CC 16FA4C0 16FA4FC 18625E4 18608D4 286A850 283E6FC 282EDF4 2859BBC 1B2EDA8 1B25878
Oct 17 22:26:51 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.7
Oct 17 22:26:53 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.6
Oct 17 22:26:53 AEDT: %SYS-3-CPUHOG: Task is running for (2097)msecs, more than (2000)msecs (1/1),process = SNMP ENGINE.
What are these errors is this a bug in the IOS
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Nov 6, 2011
i have an 2921 connected to an Catalyst 3560. My router interface shows quite a lot of input queue drops. Load is not too much max 5/255.
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May 9, 2012
I have a situation in which I want to log a specific message (informational - 6 level), but don't want to enable informational logging and get all the messages that come with it. Is there a feature in IOS, 3560 12.2(25r)SEE4, similar to the 'logging lists' feature on the ASA that allows you to specify logs that you want to capture without having to change your logging level? I didn't want to have to write an EEM applet for this, but if that's the only way, I'd consider it.
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Nov 18, 2012
I am runing 802.1x and MAB authentication of devices connected to a 3560 switch (in test). When I run 'terminal monitor' I am getting alot of authentication fail-msg. Is it possible to get the switch not to show them? I have to do some debugging on SNMP and DHCP to be able to figure out why I get these msg, but since the switch is blasting out so many auth-msg it is hard to see the debug messages. [code]
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Sep 13, 2011
I have a AIR-AP1121G-A-K9 running c1100-k9w7-tar.123-7.JA2 (Autonomous)We have monitoring setup with Orion NPM and we consistently see output errors, Transmit discards and big buffer errors The users at the site have not reporting any issues but was wondering how to prevent these or are these normal?What causes the output errors on Wireless Radio ? How to troubleshoot further ?
Radio0-802.11G
Total Output Errors 0 47749
Small Buffer Misses
4 misses
139 misses
[code]....
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Nov 16, 2011
I'm encountering what I think is an issue on logging system on FW ASA 5520 - Asa Version 8.4(2), ASDM version 6.4(5). When I disabled the logging inside a rule from ASDM, or from console with the "log disable" option inside ACL, If I check in ASDM logging real time window I continue to see all the entry related to disabled rules. This is a correct behaviour about ASA logging ? How I can "hide" the entry related to disabled rules (this is what I need for troubleshooting purposes) ?
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Feb 5, 2011
my computer is a dell dimension 1100, with a Linksys WMP54G wifi card, running vista home basic.In the wifi thing in the notification area, it shows two wireless networks, One is my normal SSID (Lower Net), and one is "Unidentified network". They are both on one wireless connection (Wireless Network Connection 3). When i try to go on the internet, it says i'm not connected. i tried disconnecting from the unidentified network, but that disconnects me from lower net too.
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Sep 23, 2012
Here is my conf:
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
[Code].....
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Dec 8, 2011
Our 2811 Edge router is having extremely high CPU problems. IP Input is consuming 70% of the process during business hours. Cisco express forwarding is enabled. It only shows 50% but its currently before business hours. Id say even 50% is still high.
CPU utilization for five seconds: 55%/16%; one minute: 70%; five minutes: 76%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
104 5310320 2813117 1887 36.92% 46.73% 51.43% 0 IP Input
The below interface is our public interface and is constantly over utilized with 100% Is there any configurations that can be done to correct this? Is there any more information that is needed?
IOS: (C2800NM-ADVSECURITYK9-M), Version 12.4(24)T4
Show IP Interface
FastEthernet0/0 is up, line protocol is up
Internet address is x.x.x.x
Broadcast address is x.x.x.x
Address determined by non-volatile memory
[code]....
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Oct 20, 2011
Do I need to plug in AP 1262 into a PoE switch or external power adapter before can power on? How about LAP 1262? Do I need PoE switch as well?
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Feb 7, 2011
I have this topology in part of my networ:k
Cisco7200---Cisco6500---Cisco3560---LAN1
|
Cisco3560
|
LAN2
All devices are interconected via optical 1Gb/s links. There is no QoS implemented on any device and all VLANs are allowed on all interfaces.
Also all links are trunks (with many VLANs)
In LAN1 there was a layer 2 broadcast-storm and 4000packets/s was comming to rest of the network (in one particular VLAN).
1) 7200 with G1 should be able to handle traffic up to 500Mb/s, but a lot of users experienced drops on traffic via 7200.
(CPU load was around 10%).
2) Why do I have input drops on 7200 on link toward 6500 if CPU was normal. Broadcast comming to this interfaces were cca 4kpps. But since it's destination is not on router these packets should be rejected on interface controller. Is that right? (7200 doesn't even has dot1q subinterface in that VLAN but since 6500 allow all VLANs on its trunk these packets reach 7200)
3) Why do I have output drops on Cisco 6500 (it is here as layer 2 device only)? It is max 160Mb/s in output direction. It has WS6724 card with DFC (there is no oversubscription).. Shouln't 6500 send traffic as fast as interface allows (up to 1Gb/s). Am I righ't?
4) After all how coul'd 6500 now if 7200 can't handle these traffic?Output drops should be only seen if QoS is enabled (i.e. shaping), or if there is oversubscription on the linecard?
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Feb 2, 2011
why my input parameter are gone in the TAGGED website ?
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Mar 25, 2012
Running vista. When I pull up my list of possible wireless signals to try and connect.
I normally get asked to input a security key. NOW the screen will simply close after i press the enter key. Right clicking and trying to connect also am having the same issue. MY wireless signal for MY comcast account it connects perfectly.
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Aug 3, 2011
I bought a DVI D to hdmi connector so i can watch movies from my computer on my hdtv but whenever i try to switch to DVI on my HP w1907 my monitor says no input signal.
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