Thanks you. That has worked great for me. On Fri, Mar 26, 2010 at 10:55 AM, Stephen Powell <zlinux...@wowway.com> wrote: > On Thu, 25 Mar 2010 23:16:59 -0400 (EDT), Roman Gelfand wrote: >> >> My server has two onboard nics. I am using etho. For the longest >> time it was working no problem. Then it just lost network >> connectivity. When running ifconfig I get RX packets:0. >> >> Would any one know a way to fix it? I had similar problem with >> centos. The solution there was to assign eth1 device to alias eth0. >> >> Any help is appreciated. > > Roman, > > First of all, when you say that you have "two onboard nics", I > interpret that to mean that there are two network adapters built-in > to the motherboard, as opposed to separate network adapters installed > in a bus-slot. Is that what you mean? That would be unusual. > It's quite common to see a motherboard with a built-in ethernet > adapter, but I haven't seen any motherboards with *two* built-in > ethernet adapters. Usually, if a machine has two ethernet adapters, > it either has two stand-alone NICs or else it has one NIC built-in > to the motherboard and one stand-alone NIC. But anyway ... > > Each network adapter (I assume they are both ethernet) has a > MAC (Media Access Control) address built-in to it. This MAC > address is assigned by the manufacturer when the board is made, and > is unique to that physical board. Another board of that same identical > make and model will have a different MAC address. Linux uses this MAC > address to uniquely identify Ethernet adapters. udev creates rules to > determine which MAC address to assign to eth0, which MAC address to assign > to eth1, etc. These rules are stored in directory /etc/udev/rules.d. > The exact name of the file to look at is dependent on the machine > architecture and which release of udev you have, but > "persistent-net" is the key phrase to look for. On my Debian Lenny > machine for the i386 architecture, the file is called > 70-persistent-net.rules. > > Typically, this type of problem happens > when one of the ethernet adapters is replaced. In the case of an > ethernet adapter built-in to the motherboard, that would mean > that the motherboard gets replaced. Or sometimes it happens > as the result of moving a hard drive from one computer to another, > which, as viewed by the operating system stored on that hard drive, > means that the NICs changed. In the case of a stand-alone NIC > you can move the old NIC to the new machine, but in the case of > a NIC built-in to the motherboard, you would need to swap motherboards > to keep the MAC address the same, and most people don't do that. > > In any event, the solution is to edit that file > (/etc/udev/rules.d/70-persistent-net.rules) and change the MAC > addresses in that file according to which one you want to be eth0 > and which one you want to be eth1. In the case of a computer > with only one network connection, I usually advise people to erase > that file, it which case it will be regenerated at the next boot > with eth0 assigned to the one and only MAC address. But in the > case of multiple adapters, I advise people to edit the file. > > ifconfig -a > > will show you the MAC addresses of the cards currently present > in the machine (look for "HWaddr"). Compare that to the MAC > addresses in /etc/udev/rules.d/70-persistent-net.rules. From > that you should be able to figure out which MAC address belongs > to the old card that is no longer installed and which "device" > it used to be. Change the entry for the new card to match that > device name and delete the entry for the old MAC address. Then, > shutdown and reboot. > > -- > .''`. Stephen Powell <zlinux...@wowway.com> > : :' : > `. `'` > `- > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > Archive: > http://lists.debian.org/35461406.21823181269615317233.javamail.r...@md01.wow.synacor.com > >
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