Not showing the correct traffic consumption on the FC port

Products

• CA Performance Management - Usage and Administration

Issue/Introduction

The metrics of the interfaces are cut between.
Also, it's apparently not showing the correct traffic consumption values.
In Spectrum and in another manager they recover traffic around 2000 Mbps, but in PM the traffic it shows is barely 6 Mbps

PM:

Spectrum:

Other:

 

Environment

Release : 22.2

Cause

It looks like your PM is using the Brocade SilkWorm Interface VC, and it seems to be using a 32-bit counter instead 64-bit counter.

The counters are constantly wrapped:

    Line 21735: Mar 02 11:59:14.507:     SnmpResponseVariable [oid=1.3.6.1.2.1.2.2.1.10.1073741843, type=COUNTER, value=973091684, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=false, indexList=null]
    Line 21806: Mar 02 12:04:14.507:     SnmpResponseVariable [oid=1.3.6.1.2.1.2.2.1.10.1073741843, type=COUNTER, value=2626288424, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=false, indexList=null]
    Line 21819: Mar 02 12:04:14.507:     SnmpResponseVariable [oid=1.3.6.1.2.1.2.2.1.10.1073741843, type=COUNTER, value=645491920, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=false, indexList=null]
    Line 21891: Mar 02 12:09:14.507:     SnmpResponseVariable [oid=1.3.6.1.2.1.2.2.1.10.1073741843, type=COUNTER, value=3761214352, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=false, indexList=null]
    Line 21904: Mar 02 12:09:14.507:     SnmpResponseVariable [oid=1.3.6.1.2.1.2.2.1.10.1073741843, type=COUNTER, value=1134925928, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=false, indexList=null]
    Line 21975: Mar 02 12:14:14.507:     SnmpResponseVariable [oid=1.3.6.1.2.1.2.2.1.10.1073741843, type=COUNTER, value=424908700, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=false, indexList=null]
    Line 21988: Mar 02 12:14:14.507:     SnmpResponseVariable [oid=1.3.6.1.2.1.2.2.1.10.1073741843, type=COUNTER, value=958661644, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=false, indexList=null]

Speed In/Out is also max of a 32-bit counter:

Mar 02 12:14:14.508: 	SpeedInOverride: NULLMar 02 12:14:14.508: 	CalculatedSpeedIn: 4294967295 (Long)Mar 02 12:14:14.508: 	SpeedOutOverride: NULLMar 02 12:14:14.508: 	CalculatedSpeedOut: 4294967295 (Long)

Seeing the speed in/out at 4.295 Gbps is a telltale sign of using 32-bit OIDs vs 64-bit and usually comes with many counter rollovers.

Resolution

The custom VC was causing the issue. After changing the VC priority (which changed to High Speed Interface VC) the issue was resolved.