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Bug 1703752

Summary: UCD-SNMP-MIB uses INTEGER32 instead of COUNTER64 for memory OIDs which limits to 2TiB
Product: Red Hat Enterprise Linux 7 Reporter: Chris Cheney <ccheney>
Component: net-snmpAssignee: Josef Ridky <jridky>
Status: CLOSED ERRATA QA Contact: David Jež <djez>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.6CC: apmukher, djez, grbrown, ovasik
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: All   
Whiteboard:
Fixed In Version: net-snmp-5.7.2-44.el7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-03-31 19:54:44 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1716965    

Description Chris Cheney 2019-04-28 06:26:15 UTC 
UCD-SNMP-MIB uses INTEGER32 instead of COUNTER64 for memory OIDs which limits the reporting to 2 TiB (using KiB as the base).

Large modern servers often contain more than 2 TiB of memory leading to the OIDs rolling over and reporting negative values.

http://www.net-snmp.org/docs/mibs/ucdavis.html
Comment 2 Josef Ridky 2019-04-29 13:11:27 UTC 
We can't modify any value from UCD-SNMP-MIB, due this MIB isn't owned by Red Hat (owner is U.C.Davis, ECE Dept.).

Unless owner will change it to Counter64, we can't do it as downstream patch.
Comment 6 Josef Ridky 2019-05-20 09:10:21 UTC 
From upstream, this issue has been resolved by adding new <var>X values. (See https://github.com/net-snmp/net-snmp/blob/master/mibs/UCD-SNMP-MIB.txt#L642) 

This change is available in Fedora and RHEL-8 already. I'll prepare patch for RHEL-7.8.
Comment 7 Josef Ridky 2019-08-14 09:56:31 UTC 
Commit: http://pkgs.devel.redhat.com/cgit/rpms/net-snmp/commit/?h=rhel-7.8&id=c0b4f3bdec4f46ff49ffdaf3230305e8868ea175
Comment 11 errata-xmlrpc 2020-03-31 19:54:44 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2020:1081