[Solved] Two ethernet ports (dhcp and static)

For various reasons I connect to the internet as follows:
Computer --> eth0 --> Linksys Router --> Aztech Modem/Router --> Internet
From time to time I need to access the Aztech. Usually I change the eth0 cable connecting to the Linksys to the Aztech. And restart networking. Access the Aztech. Then change the cable from Aztech to Linksys. Restart network.
In Debian (to avoid this cable changing), what I did was to also have a cable as follows:
Computer --> eth1 --> Aztech Modem/Router
eth1 is a static configuration. The debian /etc/network/interfaces file looks like
auto eth0
iface eth0 inet dhcp
auto eth1
iface eth1 inet static
address 10.0.0.3
netmask 255.255.255.0
So in Debian I plug a cable into eth1 (from the Aztech). I can then access the Aztech without it interfering with resolv.conf so I can still browse the internet via eth0.
I have tried the following in ArchLinux:
HOSTNAME="milomak-arch"
eth0="dhcp"
INTERFACES=(eth0)
eth1="eth1 10.0.0.1 netmask 255.255.255.0"
INTERFACES=(eth1)
gateway="default gw 192.168.1.1 10.0.02"
ROUTES=(!gateway)
However when I boot this is what I see
# ifconfig
eth1 Link encap:Ethernet HWaddr 00:24:8C:52:DC:5F
inet addr:10.0.0.1 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::224:8cff:fe52:dc5f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:468 (468.0 b)
Interrupt:17
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:24 errors:0 dropped:0 overruns:0 frame:0
TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1280 (1.2 Kb) TX bytes:1280 (1.2 Kb)
what am i missing?
Last edited by milomak (2009-11-21 10:35:16)

Put both interfaces in the INTERFACES= array.
/etc/rc.conf includes this detail, with a slightly different wording i.e.
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES

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lumpynose wrote:
wudu wrote:
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So are you good to go?
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Message Edited by Ben on 03-15-2007 05:26 PM
Ben Rayner
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[solved] e1000e: Ethernet Port not seeing any carriers

Hi, I really don't know what to do anymore.
My ethernet port, who is named enp0s25 by systemd, doesn't work. After boot it is down, after setting it up by either ifconfig or "ip link", it shows the following:
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enp0s25: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 64:31:50:94:20:0a txqueuelen 1000 (Ethernet)
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TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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Settings for enp0s25:
Cannot get device settings: No such device
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Settings for enp0s25:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: Unknown!
Duplex: Unknown! (255)
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown (auto)
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
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~ dmesg | grep e1000e
[ 4.369636] e1000e: Intel(R) PRO/1000 Network Driver - 2.1.4-k
[ 4.369640] e1000e: Copyright(c) 1999 - 2012 Intel Corporation.
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[ 4.378139] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
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Last edited by janoliver (2013-03-10 22:16:55)

Thanks a billion, I've got exactly this problem too. I had to reboot laptop every time when pluging and unpluging cable.
[ice@ice-thinker bin]$ ls /sys/class/net/ -l
total 0
lrwxrwxrwx 1 root root 0 May 8 20:10 enp0s25 -> ../../devices/pci0000:00/0000:00:19.0/net/enp0s25
lrwxrwxrwx 1 root root 0 May 8 19:55 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx 1 root root 0 May 8 19:55 wlp2s0 -> ../../devices/pci0000:00/0000:00:1c.4/0000:02:00.0/net/wlp2s0
echo on > /sys/bus/pci/devices/0000\:00\:19.0/power/control
this way can bring me network back.
reloading e1000e kernel module dose not work for me.
Last edited by shuaiming (2013-05-08 12:34:04)

54GS ver2 DHCP and static Denon AVR IP

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Ok, So my 54GS is setup for DHCP 192.168.1.100 with 7 connections. Only using 5 of these.
If I set an IP in my Denon AVR with a static IP of 192.168.110 (outside the .100 to .106 range) and the Gateway is the IP of the 54GS, Sub, DNS1, 2 as for my TCP/IP connection....then I should be able to connect to the router and dsl modem......I am unable to get the Denon to connect?
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Message Edited by linky54gs on 03-11-2008 02:36 PM
Message Edited by linky54gs on 03-11-2008 02:37 PM
Message Edited by linky54gs on 03-11-2008 02:37 PM

The puzzle continues.........
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Hello Arch Linux Forums,
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I've been trying to install Arch Linux for three days now, and the installation always screws up at either Select Source, Select Packages or Install Packages. It changes every time I try.
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Can someone point me in the right direction on what to do?
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Last edited by SeekAndDestroy (2012-05-09 16:27:30)

Mr.Elendig wrote:Check /dev/tty7 for errors and post them here in code tags.
I tried the installation again and it failed at install packages. Here's the only line in /dev/tty7 that I think is related to it.
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Dear Friend,
I am looking into constructing a Sun system with the maximum number of ethernet ports.
Q1: is there a Solaris 8 specific maximum number of ethernet ports that it can support?
Q2: i know you can get quad ethernet cards, but anyone know of cards that offer more than four per card?
Q3: assuming the cards will be PCI, which sun machine offers the maximum number of PCI slots?
I really appreciate your help
many thanks
wagwan

Hi Rukbat
Thanks for your response.
> A1: There isn't any limitation within the OS.
> Your limitations are from the hardware of the system.
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>If you have too much packet traffic for your cpu modules
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one accepts that there would be delays - naturally. but I am not sure why there would be data corruption or even panics. that to me sounds very very serious.
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erm erm I would say that is pretty low, but I would not call myself an expert on this really.
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> A2: There are no Sun-qualified adapters with more than
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i am surprised at that.
> Third party hardware? you'd be on your own and need
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yes I agree
> Besides, there is only so much room on the card's
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> A3: A Sunfire E6900 would be able to be configured for 32
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that is a good hint actually. that is the high-end range I think.
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I am still open to take advice of course. Indeed I would very much appreaciate further thoughts!
Regards,
bigAl

[Solved] Two ethernet ports (dhcp and static)

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