cat /etc/redhat-release
CentOS Stream release 9

uname -r
5.14.0-437.el9.x86_64

cat /var/log/messages|grep snmp|tail -n 1
Apr 29 10:33:30 hp2 snmpd[3719]: systemstats_linux: unexpected header length in /proc/net/snmp. 237 != 224

cat /proc/net/snmp|grep OutTransmits
Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreates OutTransmits

rpm -q net-snmp
net-snmp-5.9.1-13.el9.x86_64