[CentOS] URGENT -- pseudo network interface creating problem with dhcp-- centos 5.5

Wed Apr 11 12:43:14 UTC 2012
Markus Falb <markus.falb at fasel.at>

On 11.4.2012 12:35, sri wrote:
> Group,
> My linux box, running with Centos-5.5, is showing up (??) a pseudo
> network interface for Eth0.
> On Switch where my Eth0 is connected, observed 2 MAC-Addresses.
> If a DHCP server present in LAN, the second pseudo interface is
> picking up a DHCP IP Address too.
> Furthermore you can ping both Eth0 ip and Psedo Eth0 IP from the switch.
> The intensity of the problem is more when port-security is configured
> on SW for that port.
> “ifconfig –a” is not showing that pseudo interface.
> From dmesg output, no new things observed related while detecting the
> eth0 NIC during bootup.
> Only proof for this pseudo inerface’s mac address is SW showing it (on
> the SW port connected to my box eth0) in “show mac address-table”
> output
> Is there anything that I have to check to nail down the issue.
> Any pointers are highly appreciated.

A running virtual machine which virtual interface is bridged to eth0 ?
Kind Regards, Markus Falb

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