[collectd] Collecting more detail network statistics

[Ulf Zimmermann]

I am looking at how I could collect more detailed network (interface)
statistics. Extra numbers I am interested in are (all on Linux database
servers):

> netstat -in
Kernel Interface table
Iface       MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP
TX-OVR Flg
bond0      9000   0 4427744155      0    344      0 4494207846      0
0      0 BMmRU
bond1      1500   0 17107572826      0 14154233      0 32041369000
0      0      0 BMmRU
bond1:4    1500   0      - no statistics available -
BMmRU
eth0       1500   0 17094933377      0 14154233      0 32041368995
0      0      0 BMsRU
eth1       9000   0 4427744129      0    344      0 4494207840      0
0      0 BMsRU
eth2       1500   0 12639449      0      0      0        5      0      0
0 BMsRU
eth3       9000   0       26      0      0      0        6      0      0
0 BMsRU
lo        16436   0 153870174      0      0      0 153870174      0
0      0 LRU
> cat /proc/net/snmp
Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors
ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests
OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails
FragOKs FragFails FragCreates
Ip: 2 64 21654572736 0 7380 0 2 0 21651696350 36685339936 96045 0 2
5738006 2869002 2 2869003 0 0
Icmp: InMsgs InErrors InDestUnreachs InTimeExcds InParmProbs
InSrcQuenchs InRedirects InEchos InEchoReps InTimestamps InTimestampReps
InAddrMasks InAddrMaskReps OutMsgs OutErrors OutDestUnreachs
OutTimeExcds OutParmProbs OutSrcQuenchs OutRedirects OutEchos
OutEchoReps OutTimestamps OutTimestampReps OutAddrMasks OutAddrMaskReps
Icmp: 179399 539 72287 75 0 0 6175 87346 13516 0 0 0 0 160712 0 73365 1
0 0 0 0 87346 0 0 0 0
Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens
AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs
OutRsts
Tcp: 1 200 120000 -1 1517920 13022694 631 736932 154 17526834826
32440334577 1799855 90 1726588
Udp: InDatagrams NoPorts InErrors OutDatagrams
Udp: 4118310725 71447 1421 4244831166

As you can see there is a bunch of dropped RX packets on the interfaces
(we are looking into problems and trying to correlate those dropped
packets with problems we are encounter). Other numbers like reassemble
and other errors are of general interest too.

Is anyone collecting these numbers right now? Any hints how you would
collect them?

Regards, Ulf.

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