[mrtg] mrtg auth type

I need to add a new inferface in mrtg. I came into this with no mrtg experience, and the previous admin left no notes really. I need to know how I find if it is md5, sha1, or sha2. I thought it might be in the snmp.conf file, but I cannot find that file. So I am wonder where else to look, or a

[mrtg] new interface setup

So, I've been working on a new inferface. Trying to use currently working interface cgfmaker. When running my command, I get this: NMPopen failed: Received usmStatsWrongDigests.0 Report-PDU with value 10 during synchronization at /usr/bin/../lib64/mrtg2/Net_SNMP_util.pm line 1548

[mrtg] mrtg setup with snmp v3

Trying again to get v3 set up. Currently, my command is this: /usr/bin/cfgmaker --global "WorkDir: /var/www/mrtg/cordr1" --enablesnmpv3 --username=user --securityname=name --privpassword=pass --privprotocol=aescfb128 --authprotocol=sha --authpassword=pass --contextengineid=0x2e81200