FC1 dual NIC strange behaviour

[rfuegen]

Hi,

I'm using FC1 on an HP DL-140 machine which has 2 gbit ethernet NICs on board, configured as:

eth0 192.168.1.14
eth1 192.168.1.16

there are web sites running on both interfaces, traffic should be evenly distributed.

1st strange thing: when I shut down eth1 by using /sbin/ifconfig eth1 down, both interfaces go oflfine (bad for remote administration)

2nd strange thing: I wand to use IOG to monitor traffic volume, but the traffic reported by snmpd for the interfaces can't be correct:

IF-MIB::ifDescr.1 = STRING: lo
IF-MIB::ifDescr.2 = STRING: eth0
IF-MIB::ifDescr.3 = STRING: eth1
IF-MIB::ifInOctets.1 = Counter32: 339540709
IF-MIB::ifInOctets.2 = Counter32: 167498
IF-MIB::ifInOctets.3 = Counter32: 810348708
IF-MIB::ifOutOctets.1 = Counter32: 339542486
IF-MIB::ifOutOctets.2 = Counter32: 384
IF-MIB::ifOutOctets.3 = Counter32: 3563380490

lo (.1) has a lot of traffic, whereas the main interface (eth0/.2) hasn't. furthermore, the amount of incoming/outgoing traffic on .1 is always nearly equal.

Is there a bug or am I getting something wrong ? does the total amount of traffic show up on eth1 and is eth0's traffic routed via the loopback interface ?

tnx in advance.
rainer.

I am not a guru on dual nics, but I think that each card has to use a different driver or else there will be conflicts like when you shutdown eth0, eth1 also goes down. Not absolutely sure though