Hi there,
I posted this message a few days ago on the users list
but had no answer, so I thought it may be worth it
posting it here. This looks like a bug in
net-snmp-5.3-4.2, what do you think ?
Here's the initial message :
I'm trying to use MRTG to monitor a dynamic adsl ppp
connexion on a Fedora Core 5 box with
net-snmp-5.3-4.2. The connexion is interrupted every
other day by the provider and init restarts it
automatically thanks to this line in /etc/inittab:
pd:2345:respawn:/usr/sbin/pppd call adsl
Now the problem is that the old instances of the
interface are not cleared from the IF-MIB tree, so
multiple instances appear and this confuses mrtg:
>linux#snmpwalk -v 2c -c public localhost
IP-MIB::ipAdEntIfIndex
IP-MIB::ipAdEntIfIndex.127.0.0.1 = INTEGER: 1
IP-MIB::ipAdEntIfIndex.172.24.39.249 = INTEGER: 2
IP-MIB::ipAdEntIfIndex.196.206.94.10 = INTEGER: 8
but
>linux#snmpwalk -v 2c -c public localhost
IF-MIB::ifDescr
IF-MIB::ifDescr.1 = STRING: lo
IF-MIB::ifDescr.2 = STRING: eth0
IF-MIB::ifDescr.3 = STRING: sit0
IF-MIB::ifDescr.7 = STRING: ppp0
IF-MIB::ifDescr.8 = STRING: ppp0
Things go back to normal after snmpd is restarted:
linux#service snmpd restart
Stopping snmpd: [ OK ]
Starting snmpd: [ OK ]
linux#snmpwalk -v 2c -c public localhost
IF-MIB::ifDescr
IF-MIB::ifDescr.1 = STRING: lo
IF-MIB::ifDescr.2 = STRING: eth0
IF-MIB::ifDescr.3 = STRING: sit0
IF-MIB::ifDescr.8 = STRING: ppp0
Is this a bug ? Is there a way to have snmpd update
the MIB on the fly ?
Thanks,
Christian
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