10Gbit Interfaces shown as 1.41Gbit (SNMP)

WebUI still shows 1.41 GBits.

Output
OMD[<REMOVED>]:~$ cmk -Ivv --checks=if64 fs1
WARNING: '--checks' is deprecated in favour of option 'detect-plugins'
Discovering services and host labels on: fs1
fs1:
+ FETCHING DATA
  Source: SourceType.HOST/FetcherType.SNMP
[cpu_tracking] Start [7f6607c698e0]
[SNMPFetcher] Fetch with cache settings: SNMPFileCache(base_path=PosixPath('/omd/sites/<REMOVED>/tmp/check_mk/data_source_cache/snmp/fs1'), max_age=0, disabled=False, use_outdated=False, simulation=False), Cache enabled: False
[SNMPFetcher] Execute data source
if64: Fetching data (SNMP walk cache is disabled)
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.1'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.2'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.3'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.5'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.8'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.6'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.7'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.8'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.9'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.13'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.14'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.10'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.11'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.12'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.13'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.19'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.20'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.21'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.18'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.6'
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.31.1.1.1.15'
if64adm: Fetching data (SNMP walk cache is disabled)
Running 'snmpbulkwalk -Cr10 -v2c -c <REMOVED> -m "" -M "" -Cc -OQ -OU -On -Ot 10.20.1.19 .1.3.6.1.2.1.2.2.1.7'
Write data to cache file /omd/sites/<REMOVED>/tmp/check_mk/data_source_cache/snmp/checking/fs1
Try aquire lock on /omd/sites/<REMOVED>/tmp/check_mk/data_source_cache/snmp/checking/fs1
Got lock on /omd/sites/<REMOVED>/tmp/check_mk/data_source_cache/snmp/checking/fs1
Releasing lock on /omd/sites/<REMOVED>/tmp/check_mk/data_source_cache/snmp/checking/fs1
Released lock on /omd/sites/<REMOVED>/tmp/check_mk/data_source_cache/snmp/checking/fs1
[cpu_tracking] Stop [7f6607c698e0 - Snapshot(process=posix.times_result(user=0.030000000000000027, system=0.010000000000000009, children_user=0.02, children_system=0.02, elapsed=0.10000000149011612))]
  Source: SourceType.HOST/FetcherType.PIGGYBACK
[cpu_tracking] Start [7f6607296370]
No piggyback files for 'fs1'. Skip processing.
No piggyback files for '10.20.1.19'. Skip processing.
[PiggybackFetcher] Fetch with cache settings: NoCache(base_path=PosixPath('/omd/sites/<REMOVED>/tmp/check_mk/data_source_cache/piggyback/fs1'), max_age=0, disabled=False, use_outdated=False, simulation=False), Cache enabled: False
[PiggybackFetcher] Execute data source
Not writing data to cache file (Cache usage disabled)
[cpu_tracking] Stop [7f6607296370 - Snapshot(process=posix.times_result(user=0.0, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.0))]
+ PARSE FETCHER RESULTS
  Source: SourceType.HOST/FetcherType.SNMP
Try aquire lock on /omd/sites/<REMOVED>/var/check_mk/persisted_sections/snmp/fs1
Got lock on /omd/sites/<REMOVED>/var/check_mk/persisted_sections/snmp/fs1
Releasing lock on /omd/sites/<REMOVED>/var/check_mk/persisted_sections/snmp/fs1
Released lock on /omd/sites/<REMOVED>/var/check_mk/persisted_sections/snmp/fs1
Stored persisted sections: if64, if64adm, hr_cpu, hr_fs, hr_mem, hr_ps, if, inv_if, snmp_info, snmp_os, snmp_uptime
Skipping persisted section SectionName('if64'), live data available
Skipping persisted section SectionName('if64adm'), live data available
Using persisted section SectionName('hr_cpu')
Using persisted section SectionName('hr_fs')
Using persisted section SectionName('hr_mem')
Using persisted section SectionName('hr_ps')
Using persisted section SectionName('if')
Using persisted section SectionName('inv_if')
Using persisted section SectionName('snmp_info')
Using persisted section SectionName('snmp_os')
Using persisted section SectionName('snmp_uptime')
  -> Add sections: ['hr_cpu', 'hr_fs', 'hr_mem', 'hr_ps', 'if', 'if64', 'if64adm', 'inv_if', 'snmp_info', 'snmp_os', 'snmp_uptime']
  Source: SourceType.HOST/FetcherType.PIGGYBACK
Loading autochecks from /omd/sites/<REMOVED>/var/check_mk/autochecks/fs1.mk
No persisted sections loaded
  -> Add sections: []
Received no piggyback data
+ EXECUTING HOST LABEL DISCOVERY
Trying host label discovery with: if64, hr_cpu, hr_fs, hr_mem, hr_ps, if64adm, inv_if, snmp_info, snmp_os, snmp_uptime
+ PERFORM HOST LABEL DISCOVERY
+ EXECUTING DISCOVERY PLUGINS (1)
  Trying discovery with: if64
Loading autochecks from /omd/sites/<REMOVED>/var/check_mk/autochecks/fs1.mk
Try aquire lock on /omd/sites/<REMOVED>/var/check_mk/autochecks/fs1.mk
Got lock on /omd/sites/<REMOVED>/var/check_mk/autochecks/fs1.mk
Releasing lock on /omd/sites/<REMOVED>/var/check_mk/autochecks/fs1.mk
Released lock on /omd/sites/<REMOVED>/var/check_mk/autochecks/fs1.mk
SUCCESS - Found no new services, no new host labels

ifconfig on the server shows media: Ethernet 10Gbase-T <full-duplex> so the link is definately correct.