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Re: [Devmon] [ANTISPAMRT:]Re: input discard rate
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From: Marco A. <mar...@re...> - 2020-09-18 13:46:48
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Hi Barrie, In my case the amount of discarded packets I believe is due to the counter. From ACL on the switch: Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: Class-based queueing Output queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 241000 bits/sec, 38 packets/sec 875342 packets input, 119190972 bytes, 0 no buffer Received 40969 broadcasts (40893 multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 40893 multicast, 0 pause input 0 input packets with dribble condition detected 77267049 packets output, 9400797396 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 0 unknown protocol drops 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 Devmon allert: Gi1/0/6 - Very high output discard rate (8166.52%) I was wondering if there was a way to get over this Marco Il 18/09/2020 15:25, Barrie Smallshaw ha scritto: > Hi, > This looks like the counter has wrapped around to zero. Since the ifInDps is a DELTA value, you will get a huge spike as it wraps around. If you are getting a large amount of discards on an interface, there may be something other than the switch causing them. I’ve seen this issue when jumbo frames are configured everywhere instead of limiting them to block traffic such as iscsi or NFS. > > Barrie Smallshaw > > Sent from my iPad > >> On Sep 18, 2020, at 6:20 AM, Marco Avvisano <mar...@re...> wrote: >> >> Hi, >> >> i have the same problem using devmon to monitor cisco 3850 (same oids and transforms file) >> >> Someone solved this problem ? >> >> Thanks, >> >> Marco >> >> Il 12/05/2008 22:46, Taylor Lewick ha scritto: >>> No I hadn't thought to try that... Ill give it a try.. >>> >>> -----Original Message----- >>> From: dev...@li... [mailto:dev...@li...] On Behalf Of Guðmundur Örn Ingvarsson >>> Sent: Friday, May 09, 2008 8:05 AM >>> To: dev...@li... >>> Subject: Re: [Devmon] input discard rate >>> >>> Have you tried reviewing the RRD files and doing the calculations yourself? >>> >>> ___________________________________________ >>> >>> Guðmundur Örn Ingvarsson >>> Landsbankinn >>> Global Unix Infrastructure Engineer >>> Core Systems IT - CS IT >>> >>> Sími / Tel.: (+354) 410 6730 >>> Farsími / Mobile: (+354) 820 5074 >>> Fax: (+354) 410 3032 >>> gud...@la... >>> www.landsbanki.is >>> >>> >>> -----Original Message----- >>> From: dev...@li... [mailto:dev...@li...] On Behalf Of Taylor Lewick >>> Sent: 8. maí 2008 19:14 >>> To: dev...@li... >>> Subject: Re: [Devmon] input discard rate >>> >>> Sure, here they are, but they haven't been touched... >>> >>> Oids >>> ifName : .1.3.6.1.2.1.31.1.1.1.1 : branch >>> ifAlias : .1.3.6.1.2.1.31.1.1.1.18 : branch >>> ifInOctets : .1.3.6.1.2.1.2.2.1.10 : branch >>> ifInDiscards : .1.3.6.1.2.1.2.2.1.13 : branch >>> ifOutOctets : .1.3.6.1.2.1.2.2.1.16 : branch >>> ifOutDiscards : .1.3.6.1.2.1.2.2.1.19 : branch >>> >>> transforms >>> # Get bit speed delta (so we dont have to provide custom delta limit) >>> ifInOps : DELTA : {ifInOctets} >>> ifOutOps : DELTA : {ifOutOctets} >>> # Convert our octets delta into bits per second >>> ifInBps : MATH : {ifInOps} x 8 >>> ifOutBps : MATH : {ifOutOps} x 8 >>> # Do delta transform on all error counters >>> ifInDps : DELTA : {ifInDiscards} >>> ifOutDps : DELTA : {ifOutDiscards} >>> # Perform error to traffic percentage calculations >>> ifInDscPct : MATH : ({ifInDps} / {ifInBps}) x 100 >>> ifOutDscPct : MATH : ({ifOutDps} / {ifOutBps}) x 100 >>> # Create an alias in a bracketed box, or nothing if alias is blank >>> ifAliasBox : REGSUB : {ifAlias} /(\S+.*)/ [$1]/ >>> >>> messages >>> <b>Discards:</b> >>> TABLE: >>> Ifc name|Discards in|Discard rate in|Discard load in|Discards out|Discard rate out|Discard load out >>> {ifName}{ifAliasBox}|{ifInDiscards}|{ifInDps}|{ifInDscPct.color}{ifInDscPct}%{ifInDscPct.errors}|{ifOutDiscards}|{ifOutDps}|{ifOutDscPct.color}{ifOutDscPct}%{ifOutDscPct.errors} >>> >>> Note: >>> Error rates are per second. >>> Load percentages are based on error/bit ratio. >>> >>> >>> ________________________________________ >>> From: dev...@li... [mailto:dev...@li...] On Behalf Of Guðmundur Örn Ingvarsson >>> Sent: Thursday, May 08, 2008 10:47 AM >>> To: 'dev...@li...' >>> Subject: Re: [Devmon] input discard rate >>> >>> We're monitoring a few 6509 but I can't say we've seen numbers like that one. >>> Can you include the oids, transforms and messages files just if there is anything spooky in there? >>> >>> >>> >>> From: dev...@li... [mailto:dev...@li...] On Behalf Of Taylor Lewick >>> Sent: 8. maí 2008 15:11 >>> To: dev...@li... >>> Subject: [Devmon] input discard rate >>> >>> Is anyone out there using devmon to monitor a 6509? If so, do you ever get messages about a link having a very high input discard rate? >>> >>> And if so, what does that mean? I can see output discard counters on the switch by running show int gi#/# counter errors, but I don't see any counters for input-discards, only output-discards. >>> Also, if you look below, the Discards In reports as 0, yet the rate in reports as 72796055, and a 4386%, so I think something is wrong with the way devmon is calculating the discard load in. >>> >>> Ifc name Discards in Discard rate in Discard load in Discards out Discard rate out Discard load out >>> Gi#/# [*** some link ***] 0 72796055.85 4386.49% 0 0.00 0.00% >>> >>> And the rate we are getting is unreal (see above). We aren't hearing of any problems on this link, yet devmon is reporting. This happens about once an hour and lasts about for one poll cycle, i.e. one minute. >>> >>> >>> >>> Fyrirvari/Disclaimer >>> http://www.landsbanki.is/disclaimer >>> >>> ------------------------------------------------------------------------- >>> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >>> Don't miss this year's exciting event. There's still time to save $100. >>> Use priority code J8TL2D2. >>> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone >>> _______________________________________________ >>> Devmon-support mailing list >>> Dev...@li... >>> https://lists.sourceforge.net/lists/listinfo/devmon-support >>> Fyrirvari/Disclaimer >>> http://www.landsbanki.is/disclaimer >>> >>> ------------------------------------------------------------------------- >>> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >>> Don't miss this year's exciting event. There's still time to save $100. >>> Use priority code J8TL2D2. >>> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone >>> _______________________________________________ >>> Devmon-support mailing list >>> Dev...@li... >>> https://lists.sourceforge.net/lists/listinfo/devmon-support >>> >>> ------------------------------------------------------------------------- >>> This SF.net email is sponsored by: Microsoft >>> Defy all challenges. Microsoft(R) Visual Studio 2008. >>> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ >>> _______________________________________________ >>> Devmon-support mailing list >>> Dev...@li... >>> https://lists.sourceforge.net/lists/listinfo/devmon-support >> >> _______________________________________________ >> Devmon-support mailing list >> Dev...@li... >> https://lists.sourceforge.net/lists/listinfo/devmon-support > > _______________________________________________ > Devmon-support mailing list > Dev...@li... > https://lists.sourceforge.net/lists/listinfo/devmon-support |
