No 64-bit traffic counters in SNMP
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SNMP does not return any Counter64 values for any of my OpenVPN interfaces (client or server). The only interfaces with 64-bit counters are the two NICs and their VLANs.
IF-MIB::ifName.1 = STRING: igb0
IF-MIB::ifName.2 = STRING: igb1
IF-MIB::ifName.3 = STRING: lo0
IF-MIB::ifName.4 = STRING: enc0
IF-MIB::ifName.5 = STRING: pflog0
IF-MIB::ifName.6 = STRING: pfsync0
IF-MIB::ifName.7 = STRING: igb1.666
IF-MIB::ifName.8 = STRING: igb1.42
IF-MIB::ifName.9 = STRING: ovpns3
IF-MIB::ifName.10 = STRING: ovpnc5
IF-MIB::ifName.11 = STRING: ovpnc6
IF-MIB::ifName.12 = STRING: ovpnc1
…
IF-MIB::ifOutBroadcastPkts.12 = Counter32: 0
IF-MIB::ifHCInOctets.1 = Counter64: 151272924499
IF-MIB::ifHCInOctets.2 = Counter64: 702458174954
IF-MIB::ifHCInOctets.7 = Counter64: 306268390814
IF-MIB::ifHCInOctets.8 = Counter64: 165550732282
IF-MIB::ifHCInUcastPkts.1 = Counter64: 205023831
...I'm running 2.4.2-RELEASE-p1 (amd64).
It doesn't look like an SNMP issue since none of the ovpnXX byte counters exceed 2^32 when I run 'netstat -ib'.
It seems like it should be a tun driver issue but I looked at if_tun.c and it looks like it's doing the right thing.
Any ideas?
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Are you using the built-in bsnmpd or the net-snmp package?
net-snmp appears to have counter64 data for ovpn interfaces.
$ snmpwalk bill ifName IF-MIB::ifName.1 = STRING: vmx0 IF-MIB::ifName.2 = STRING: vmx1 IF-MIB::ifName.3 = STRING: vmx2 IF-MIB::ifName.4 = STRING: lo0 IF-MIB::ifName.5 = STRING: enc0 IF-MIB::ifName.6 = STRING: pflog0 IF-MIB::ifName.7 = STRING: pfsync0 IF-MIB::ifName.8 = STRING: gif0 IF-MIB::ifName.9 = STRING: ovpns2 IF-MIB::ifName.10 = STRING: ovpns4 IF-MIB::ifName.11 = STRING: ovpns1 $ snmpwalk bill ifHCInOctets IF-MIB::ifHCInOctets.1 = Counter64: 206324779 IF-MIB::ifHCInOctets.2 = Counter64: 1245848 IF-MIB::ifHCInOctets.3 = Counter64: 0 IF-MIB::ifHCInOctets.4 = Counter64: 3667209 IF-MIB::ifHCInOctets.5 = Counter64: 0 IF-MIB::ifHCInOctets.6 = Counter64: 0 IF-MIB::ifHCInOctets.7 = Counter64: 0 IF-MIB::ifHCInOctets.8 = Counter64: 8469397 IF-MIB::ifHCInOctets.9 = Counter64: 8510755 IF-MIB::ifHCInOctets.10 = Counter64: 0 IF-MIB::ifHCInOctets.11 = Counter64: 0 $ snmpwalk bill ifInOctets IF-MIB::ifInOctets.1 = Counter32: 206350521 IF-MIB::ifInOctets.2 = Counter32: 1246200 IF-MIB::ifInOctets.3 = Counter32: 0 IF-MIB::ifInOctets.4 = Counter32: 3667209 IF-MIB::ifInOctets.5 = Counter32: 0 IF-MIB::ifInOctets.6 = Counter32: 0 IF-MIB::ifInOctets.7 = Counter32: 0 IF-MIB::ifInOctets.8 = Counter32: 8470213 IF-MIB::ifInOctets.9 = Counter32: 8511571 IF-MIB::ifInOctets.10 = Counter32: 0 IF-MIB::ifInOctets.11 = Counter32: 0Index 9 is the one to look at.
If you don't need anything from the pf MIB then you are probably better off using the NET-SNMP package.
