No 64-bit traffic counters in SNMP

llowrey0

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?

jimp

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: 0

Index 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.