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Re: Strange network things: eth1 (but no nic!!) and sit0



On Saturday 25 February 2006 07:56, Joost Kraaijeveld wrote:
> Hi,
>
> After installing Etch on my AMD64 machine I suddenly have an extra eth1
> without actually having an NIC. I cannot activate it  in the "Network
> settings" applet but it is shown during boot and in the output of
> ifconfig (without ip address). Can anyone give me clue as to where this
> eth1 is comming from ? Is that related to my next question (IP6)?  Or
> maybe firewire ?

There is a good chance this is your Firewire interface. For instance, on my 
system:

$ ip link show
1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:11:d8:68:f5:92 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
    link/ieee1394 00:11:d8:00:00:08:50:49 brd ff:ff:ff:ff:ff:ff:ff:ff
4: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0

Notice that eth0 is link/ether (Ethernet) and eth1 is link/ieee1394 
(Firewire).

> I also have a "sit0" which appears to be a IPv6-in-IPv4 address. Is that
> correct? IS there any documentation available a to why that is (I have
> nothing configured myself, there is nothing about IP6 I can find on my
> machine)?

sit0 is a generic device that will AFAIK always be around if you have IPv6 
support, whether or not that support is configured.

-- 
Wesley J. Landaker <wjl@icecavern.net> <xmpp:wjl@icecavern.net>
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