New here, sorry if it's not here the best place to report.

I've find that the oid .1.3.6.1.2.1.6.14 is aliased as tcpInErrors:

[root@vnmslin1 etc]# grep ".1.3.6.1.2.1.6.14" /opt/opennms/etc/datacollection/mib2.xml
<mibObj oid=".1.3.6.1.2.1.6.14" instance="0" alias="tcpInErrors" type="Counter32" />

While the RFC defines it as tcpInErrs:

3.9. The TCP Group

Two new variables are added:

tcpInErrs
tcpOutRsts

which keep track of the number of incoming TCP segments in error and
the number of resets generated by a TCP.

https://www.ietf.org/rfc/rfc1213.txt
http://tools.cisco.com/Support/SNMP/do/BrowseOID.do?local=en&translate=Translate&objectInput=1.3.6.1.2.1.6.14

So I tried the rest of the oids to find if some other was also missing on my switch, just FYI:

[root@vnmslin1 etc]# for i in `grep -s -o "alias=\"[[:alpha:]]*\"" datacollection/mib2.xml |cut -d \" -f 2`; do snmpwalk -v2c -c ... 10.50.12.2 $i 1>/dev/null; done
icmpOutTimestmpReps: Unknown Object Identifier (Sub-id not found: (top) -> icmpOutTimestmpReps)
coffeePotCapacity: Unknown Object Identifier (Sub-id not found: (top) -> coffeePotCapacity)
coffeePotLevel: Unknown Object Identifier (Sub-id not found: (top) -> coffeePotLevel)
coffeePotTemp: Unknown Object Identifier (Sub-id not found: (top) -> coffeePotTemp)
pethMainPsePower: Unknown Object Identifier (Sub-id not found: (top) -> pethMainPsePower)
pethMainPseConPower: Unknown Object Identifier (Sub-id not found: (top) -> pethMainPseConPower)
tcpInErrors: Unknown Object Identifier (Sub-id not found: (top) -> tcpInErrors)
upsSecondsOnBattery: Unknown Object Identifier (Sub-id not found: (top) -> upsSecondsOnBattery)
upsEstMinsRemain: Unknown Object Identifier (Sub-id not found: (top) -> upsEstMinsRemain)
upsEstChargeRemain: Unknown Object Identifier (Sub-id not found: (top) -> upsEstChargeRemain)
upsBatteryVoltage: Unknown Object Identifier (Sub-id not found: (top) -> upsBatteryVoltage)
upsBatteryCurrent: Unknown Object Identifier (Sub-id not found: (top) -> upsBatteryCurrent)
upsBatteryTemp: Unknown Object Identifier (Sub-id not found: (top) -> upsBatteryTemp)
upsOutputSource: Unknown Object Identifier (Sub-id not found: (top) -> upsOutputSource)