There ought to be some sort of monitoring for the current/past state of the network. Currently this page is a log of BenjaminJencks attempts to set this up.

Vision

Something, probably Cacti, monitoring all the APs for

• Number of associated stations (done with assoc_count script)
• Link throughput (built into snmpd, unless bridges cause weirdness (I don't see why they would))
• Link status? This might be derived from throughput

So Far

• mississippi has snmp tools installed
• metrix-naya-{n,s}w has snmpd installed
• metrix-naya-sw has /usr/local/bin/assoc_count, which prints the number of associated stations.

• snmpd is configured to use assoc_count for OID 1.3.6.1.4.1.2021.8.1.101.1, otherwise known as UCD-SNMP-MIB::extOutput.1. This is a string, I don't know if that will cause problems later. If it does, it's simple enough to make assoc_count return the number as an exit status, which snmpd reports as an integer.

• This means you can count stations with snmpget -c public -v 1 10.11.104.2 1.3.6.1.4.1.2021.8.1.101.1
• Installed IEEE802dot11-MIB on mississippi. use -m IEEE802dot11-MIB option on snmp commands when you need to.

• Installed Cacti. http://buick.personaltelco.net/cacti/graph_view.php

• Made host template "Metrix box" that includes # of STAs graph.

Set up

To set up a metrix box for monitoring:

metrix# remountrw
metrix# apt-get install snmpd ash
metrix# vi /etc/default/snmpd # set TRAPDRUN=no
metrix# cd /var/lib
metrix# cp -a snmp/ /ro/var/lib
metrix# mv snmp/ /rw/var/lib
metrix# ln -s /rw/var/lib/snmp/ .

// Get snmpd and assoc_count from another metrix
mississippi$ scp snmpd.conf root@metrix-ed.mississippi:/etc/snmp
mississippi$ scp assoc_count root@metrix-ed.mississippi:/usr/local/bin

metrix# /etc/init.d/snmpd restart
metrix# remountro

Next Steps

• Set up SNMPd on all the metrixes.
• These need SVN access, so I can edit httpd.conf and snmpd.conf
  • Monitor throughput on mississippi itself.
  • Fix the kludge on httpd.conf I did.