[mrtg] SNMP/MRTG/Linux

[Evelio]

Jan sorry to bother you again.

I have a question about SNMP/MRTG ...

If I execute this command against a Linux host:
  snmpwalk -v2c x.y.w.z public interfaces

I get the following:

  interfaces = No more variables left in this MIB View

The same command over a Windows 2000 server gives me this result:

interfaces.ifNumber.0 = 2
interfaces.ifTable.ifEntry.ifIndex.1 = 1
interfaces.ifTable.ifEntry.ifIndex.16777219 = 16777219
interfaces.ifTable.ifEntry.ifDescr.1 = MS TCP Loopback interface
interfaces.ifTable.ifEntry.ifDescr.16777219 = 3Com EtherLink PCI
interfaces.ifTable.ifEntry.ifType.1 = softwareLoopback(24)
interfaces.ifTable.ifEntry.ifType.16777219 = ethernetCsmacd(6)
interfaces.ifTable.ifEntry.ifMtu.1 = 32768
interfaces.ifTable.ifEntry.ifMtu.16777219 = 1500
interfaces.ifTable.ifEntry.ifSpeed.1 = Gauge32: 10000000
interfaces.ifTable.ifEntry.ifSpeed.16777219 = Gauge32: 100000000
interfaces.ifTable.ifEntry.ifPhysAddress.1 =
interfaces.ifTable.ifEntry.ifPhysAddress.16777219 = 0:4:76:e:e2:31
interfaces.ifTable.ifEntry.ifAdminStatus.1 = up(1)
interfaces.ifTable.ifEntry.ifAdminStatus.16777219 = up(1)
interfaces.ifTable.ifEntry.ifOperStatus.1 = up(1)
interfaces.ifTable.ifEntry.ifOperStatus.16777219 = up(1)
interfaces.ifTable.ifEntry.ifLastChange.1 = Timeticks: (0) 0:00:00.00
interfaces.ifTable.ifEntry.ifLastChange.16777219 = Timeticks: (0) 0:00:00.00
interfaces.ifTable.ifEntry.ifInOctets.1 = Counter32: 464482986
interfaces.ifTable.ifEntry.ifInOctets.16777219 = Counter32: 1372870024
interfaces.ifTable.ifEntry.ifInUcastPkts.1 = Counter32: 7626848
interfaces.ifTable.ifEntry.ifInUcastPkts.16777219 = Counter32: 20832858
interfaces.ifTable.ifEntry.ifInNUcastPkts.1 = Counter32: 0
interfaces.ifTable.ifEntry.ifInNUcastPkts.16777219 = Counter32: 100584
interfaces.ifTable.ifEntry.ifInDiscards.1 = Counter32: 0
interfaces.ifTable.ifEntry.ifInDiscards.16777219 = Counter32: 0
interfaces.ifTable.ifEntry.ifInErrors.1 = Counter32: 0
interfaces.ifTable.ifEntry.ifInErrors.16777219 = Counter32: 0
interfaces.ifTable.ifEntry.ifInUnknownProtos.1 = Counter32: 0
interfaces.ifTable.ifEntry.ifInUnknownProtos.16777219 = Counter32: 70432
interfaces.ifTable.ifEntry.ifOutOctets.1 = Counter32: 464482986
interfaces.ifTable.ifEntry.ifOutOctets.16777219 = Counter32: 3988513735
interfaces.ifTable.ifEntry.ifOutUcastPkts.1 = Counter32: 7626848
interfaces.ifTable.ifEntry.ifOutUcastPkts.16777219 = Counter32: 23619389
interfaces.ifTable.ifEntry.ifOutNUcastPkts.1 = Counter32: 0
interfaces.ifTable.ifEntry.ifOutNUcastPkts.16777219 = Counter32: 8160
interfaces.ifTable.ifEntry.ifOutDiscards.1 = Counter32: 0
interfaces.ifTable.ifEntry.ifOutDiscards.16777219 = Counter32: 0
interfaces.ifTable.ifEntry.ifOutErrors.1 = Counter32: 0
interfaces.ifTable.ifEntry.ifOutErrors.16777219 = Counter32: 0
interfaces.ifTable.ifEntry.ifOutQLen.1 = Gauge32: 0
interfaces.ifTable.ifEntry.ifOutQLen.16777219 = Gauge32: 0
interfaces.ifTable.ifEntry.ifSpecific.1 = OID: .ccitt.zeroDotZero
interfaces.ifTable.ifEntry.ifSpecific.16777219 = OID: .ccitt.zeroDotZero

Does this mean that ...?

1) By default, Linux host is not configured to give me these results.
2) I do have to configure snmpd.conf to obtain the same results. For
example, in
   case of ifOutOctets and ifInOctets, do I have to use some script to get
them ?
   grep eth0 /proc/net/dev|awk '{ print $1}' and map it to a MIB. ??

3) It is not ok the accesibility level in snmpd.conf.
4) None of the above. I do not get the point.

This is the snmpd.conf (UCD-snmp version:  4.1.1) that I have now:

com2sec paranoid  default         public

group MyROSystem v1         paranoid
group MyROSystem v2c        paranoid
group MyROSystem usm        paranoid
group MyROGroup  v1         readonly
group MyROGroup  v2c        readonly
group MyROGroup  usm        readonly
group MyRWGroup  v1         readwrite
group MyRWGroup  v2c        readwrite
group MyRWGroup  usm        readwrite

view all    included  .1                               80
view system included  .iso.org.dod.internet.mgmt.mib-2.system

access MyROSystem ""      any       noauth    exact  system none   none
access MyROGroup  ""      any       noauth    exact  all    none   none
access MyRWGroup  ""      any       noauth    exact  all    all    none

How do I extend the agent to get interfaces results?

Any suggestions?

Thanks in advance
------------
Evelio Martínez

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