Re: SNMP problems with an ISDN connection

[Nathan E Norman <finn@midco.net>]

On Tue, 4 Jan 2000, Jonathan Hall wrote:

 : I have a slink system running snmpd 3.6b7 to report traffic over an ISDN
 : connection (using a Spellcaster DC/Plus ISA card).  The same version of
 : snmpd on a different machine, reporting just a dedicated PPP connection,
 : works great.
 : 
 : On the ISDN connection, though, it does not report accurate data--the
 : figures it gives are very low (when the 64k ISDN line is saturated, it
 : reports 10-20% usage), and the incoming and outgoing data is only different
 : by 5-10% on average, often showing more outgoing data than incoming, even
 : when a download is in place (and incoming would typically exceed outgoing by
 : many times).
 : 
 : In searching the web, I found a patch for cmu-snmpd 3.2 that allegedly fixes
 : problems reporting inaccurate figures for ISDN connections.  However, the
 : link to the patch is broken, and that patch is for a version of snmpd that's
 : older than what I'm using now.
 : 
 : Question is:  Is this problem fixable, either with a patch to snmpd, by
 : upgrading snmpd, or by another means?  Or... am I just doing something
 : wrong/silly that's causing my problems?  :-)

We use a lot of SNMP here (or at least we try to), and in my limited
experience with SNMP on Linux I've found the UCD SNMP packages to be
more useful than the CMU packages (the UCD packages are in potato).

If you don't want to upgrade to potato yet, grab the UCD SNMP source
deb(s) from your friendly neighborhood debian mirror and build your own
debs.  Works for me ...

To build packages (a quick un-asked for extra; sorry if this offends):

  # (Uh, I used my local mirror :)
  wget http://debian.midco.net/debian/dists/potato/main/source/net/ucd-snmp_4.0.1.orig.tar.gz
  wget http://debian.midco.net/debian/dists/potato/main/source/net/ucd-snmp_4.0.1-5.diff.gz
  wget http://debian.midco.net/debian/dists/potato/main/source/net/ucd-snmp_4.0.1-5.dsc
  # extract the source
  dpkg-source -x ucd-snmp_4.0.1-5.dsc
  # build it
  cd ucd-snmp-4.0.1
  dpkg-buildpackage -rsudo -uc -B

I just tried all this on a slink system, you should end up with the
following debs:

  libsnmp4.0-dev_4.0.1-5_i386.deb
  libsnmp4.0_4.0.1-5_i386.deb
  snmp_4.0.1-5_i386.deb
  snmpd_4.0.1-5_i386.deb

HTH,

--
Nathan Norman
MidcoNet  410 South Phillips Avenue  Sioux Falls, SD
mailto:finn@midco.net           http://www.midco.net
finger finn@home.midco.net for PGP Key: (0xA33B86E9)