[Linux-Anyway] Re: eth1
- From: Meph Istopheles <meph@xxxxxxxxxxx>
- To: Linux-Anyway@xxxxxxxxxxxxx
- Date: Thu, 6 Mar 2003 12:16:04 -0800 (PST)
Horror,
> > Hey,
> > Poking in the dark here. Each appears to be OK, but eth1
> > isn't accessable from 10.0.0.3, the W2k box. Anyone know what
> > I've done wrong?
> > # /sbin/ifconfig eth1
> > eth1 Link encap:Ethernet HWaddr 00:60:08:A0:92:22
> > inet addr:10.0.0.2 Bcast:10.255.255.255
> > Mask:255.0.0.0
> > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> > RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> > TX packets:5 errors:0 dropped:0 overruns:0 carrier:3
> > collisions:0 txqueuelen:100
> > RX bytes:0 (0.0 b) TX bytes:300 (300.0 b)
> > Interrupt:10 Base address:0xecc0
> >
> > Meph
> The reason is that you don't have eth1. You have only one NIC
> in there, right?
Uh, no. There are two phisical nics. They appear to be using
the same irq, but different addresses.
It may be that the second nic isn't actually recognised by the
system, &, to get two addresses, the system uses different base
addresses for the same nic?
In any case, I thought I may be using the wrong broadcast
addressing & switched (based on some ipmasq howto) to a 192.x
addressing & used the broadcast addressing specified in the
howto. Still, no go -- with either nic.
> Then eth1 is what you could call "virtual interface", hehe. The
> one that's physically connected with your winbox is eth0
Huh? There is an eth0 on each box. Win eth0 is set to
192.168.0.3 (or was 10.0.0.3) & eth0 on the Linux box is
63.249.19.72, while the Linux box eth1 is 192.168.0.2 (was
10.0.0.2) (note: the dsl router is set to 10.0.0.1).
So, here you ~really~ confuse me.
> and you need to configure two addresses for it. Now, I've known
> for a long time that linux can have more IP's on the same NIC,
> but I never needed it, didn't know how it's done, and found out
> that this isn't documented either. ifconfig manpage didn't
> help, google did. What you need is: ifconfig eth0:1 10.0.0.2 up
OK. Did that. No change.
> The description I found said: ifconfig IF:N <ip-address>
> up/down, where IF is clearly the interface name, and N a number
> between 1 and 255, meaning that you can switch 256 IP's on one
> interface on and off as you please, yipee. Don't know why, but
> this newly discovered fact gives me a strange pleasure.
Interesting. I wonder though, after running it on eth0
without error, I still get:
eth0 Link encap:Ethernet HWaddr 00:C0:4F:60:E4:5F
inet addr:63.249.19.72 Bcast:63.255.255.255
Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1621713 errors:0 dropped:0 overruns:0
frame:0
TX packets:1732265 errors:0 dropped:0 overruns:0
carrier:2305
collisions:43089 txqueuelen:100
RX bytes:1026006417 (978.4 Mb) TX bytes:1120018609
(1068.1 Mb)
Interrupt:10 Base address:0xdc00
> Hope this helps
Well, I s'pose it would -- if I got the subnet working:-(.
Meph
--
There are people so addicted to exaggeration that they can't
tell the truth without lying.
-Josh Billings
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