Hi

I have a linux machine that hosts several virtual machines. The machine
has 4 Gigabit Ethernet NICs. The primary one is configured as a bridge
interface (br0) for the virtual machines to communicate with the network.

The machine's primary ip address is also on that bridge interface.

IF-MIB::ifName.1 = STRING: lo
IF-MIB::ifName.2 = STRING: eth1
IF-MIB::ifName.3 = STRING: eth3
IF-MIB::ifName.4 = STRING: eth0
IF-MIB::ifName.5 = STRING: eth2
IF-MIB::ifName.6 = STRING: bond0
IF-MIB::ifName.7 = STRING: br0
IF-MIB::ifName.8 = STRING: virbr0

net-snmp seems to think this bridge interface is a 100 MBit interface.
When querying the ifspeed column, I get

IF-MIB::ifSpeed.1 = Gauge32: 10000000
IF-MIB::ifSpeed.2 = Gauge32: 1000000000
IF-MIB::ifSpeed.3 = Gauge32: 1000000000
IF-MIB::ifSpeed.4 = Gauge32: 1000000000
IF-MIB::ifSpeed.5 = Gauge32: 1000000000
IF-MIB::ifSpeed.6 = Gauge32: 10000000
IF-MIB::ifSpeed.7 = Gauge32: 10000000
IF-MIB::ifSpeed.8 = Gauge32: 10000000

So I wanted to configure br0's speed with the snmpd.conf line:

interface br0 6 1000000000

Then I restart net-snmp and after a minute (values change in the first
minute I noticed), query again:

IF-MIB::ifName.1 = STRING: lo
IF-MIB::ifName.2 = STRING: eth1
IF-MIB::ifName.3 = STRING: eth3
IF-MIB::ifName.4 = STRING: eth0
IF-MIB::ifName.5 = STRING: eth2
IF-MIB::ifName.6 = STRING: bond0
IF-MIB::ifName.7 = STRING: br0
IF-MIB::ifName.8 = STRING: virbr0

IF-MIB::ifSpeed.1 = Gauge32: 10000000
IF-MIB::ifSpeed.2 = Gauge32: 10000000
IF-MIB::ifSpeed.3 = Gauge32: 10000000
IF-MIB::ifSpeed.4 = Gauge32: 10000000
IF-MIB::ifSpeed.5 = Gauge32: 10000000
IF-MIB::ifSpeed.6 = Gauge32: 10000000
IF-MIB::ifSpeed.7 = Gauge32: 1000000000
IF-MIB::ifSpeed.8 = Gauge32: 10000000

So br0's speed is now correct, but the speed of the physical devices
(index 1-5) is wrong.

This looks like a bug to me - or am I doing something wrong?

Regards
Dominik

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