Re: showing NIC as dev609 and not as eth1

From: Dances With Crows (danSPANceswitTRAPhcrows_at_gmail.com)
Date: 08/22/05 

Date: Mon, 22 Aug 2005 08:13:50 -0500

On 21 Aug 2005 21:27:24 -0700, Harshal staggered into the Black Sun and
said:
> Dances With Crows wrote:
>> Post the outputs of ifconfig, lspci, lsmod, and whatever's relevant
>> from the output of dmesg. This makes very little sense to me and
>> I've never heard of anything like it happening before. Oh well, post
>> the information I asked for so people can look at it, and someone may
>> be able to figure out how to fix it.
>
> Here is the ifconfig output

That's just the ifconfig output. What about the other things I asked
for? The ifconfig output is not enough information to solve
anything--just confirm that there's something weird going on.

> dev609 Link encap:Ethernet HWaddr 00:08:A1:65:7E:BC
> inet addr:172.18.1.1 Bcast:172.18.1.255 Mask:255.255.255.0
> RX bytes:22126708 (21.1 Mb) TX bytes:2884689811 (2751.0 Mb)
> Interrupt:17 Base address:0x2c00
>
> eth1 Link encap:Ethernet HWaddr 00:08:A1:65:7E:BC
> inet addr:172.18.2.1 Bcast:172.18.1.255 Mask:255.255.255.0
> RX bytes:22126708 (21.1 Mb) TX bytes:2884689811 (2751.0 Mb)
> Interrupt:17 Base address:0x2c00

Look at this. Something is very weird here, and it's not just the
strange name for eth0. Both devices have the same MAC address--that
should never happen, but it can with NICs produced by the lowest bidder.
Both devices are on different subnets, but they have the same broadcast
address. That shouldn't happen since they're on different subnets. The
RX and TX bytes are exactly the same for both devices. That's
*possible*, it's just... weird for your typical gateway/firewall
machine. Finally, the IRQ and I/O reported for both devices is the
same. The only way that should ever happen is if you have a dual-port
NIC.

So... what's really going on here? And follow up with the output from
lspci, lsmod, and the parts of dmesg that are relevant. 

-- 
Matt G|There is no Darkness in Eternity/But only Light too dim for us to see
Brainbench MVP for Linux Admin /    mail: TRAP + SPAN don't belong
http://www.brainbench.com     /    "He is a rhythmic movement of the
-----------------------------/      penguins, is Tux." --MegaHAL

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