Tagged Questions

1
vote
1answer
27 views

Setting up network cards on FreeBSD

I just installed FreeBSD 9 on a new laptop and I'm having some trouble getting the network cards to work. Presumably the file representing the cards is in /dev, but where would the configuration files ...
1
vote
1answer
67 views

Creating an Alias to Loopback Interface with an Arbitrary Name

I have an odd problem that seems simple enough but has evaded me thus far. I am attempting to support a legacy application that has a hard-coded ethernet device name ("eth0"). This hard-coding, I am ...
1
vote
1answer
76 views

Help understanding interfaces in Backtrack

I am fairly new in UNIX and have recently installed backtrack on a VMWare box on my machine and I am trying to use DHCLIENT command but am having trouble in understanding the interfaces. I am ...
1
vote
0answers
160 views

Wlan0 Static Ip bridge

EDIT: Even taking br0 out, still cannot get a static IP connection. I had the following /etc/network/interfaces configuration and it was working auto lo iface lo inet loopback auto eth0 iface etho ...
2
votes
1answer
104 views

directions about customized Layer 2 implementation in linux

I have some machines running on the same network. One node is the control node which distributes traffic coming to it to the other nodes. The thing is that I want to have a custom protocol header ...
2
votes
1answer
155 views

Excessive retransmissions on Ethernet

The CSMA/CA variants of Ethernet handle excessive failed transmissions due to repeated collisions by dropping the current frame and relying on upper layers for retransmissions: After 16 attempts ...
2
votes
3answers
127 views

Connecting Debian webserver to network

I am currently running a webserver with Debian 5.0.2. It has been working (more or less) fine for the past 2-3 years but recently it went down due to some power-outage. Ever since I have brought it ...
2
votes
2answers
1k views

Where could I find the ifcfg-eth0 file?

I am using RHEL6, but I could not find the Ethernet interface configuration file ifcfg-eth0 under /etc/sysconfig/network-scripts. Issuing ifconfig -a shows that eth0 does exist. Could it be that the ...
1
vote
1answer
1k views

What is the difference between virbr# and vnet#?

I am running KVM on RHEL6, and I have created several virtual machines in it. Issuing ifconfig command to the host system command line shows a list of virbr0, virbr1... and vnet0, vnet2... Are they ...
1
vote
1answer
418 views

Network Interface Names output from ifconfig

So this has been driving me nuts for a good couple of hours, so I thought I'd ask about it here (let me know if there's a better forum for this question). I have a CentOS Virtual Machine on ESXi. I ...
1
vote
1answer
295 views

ifconfig + FAILED from ifconfig on solaris machines

please advice - what the meaning of FAILED word from ifconfig command Dose its mean that network from NIC isn't stable until this moment ? Not clearly if ifconfig read network status each some mili ...
1
vote
1answer
421 views

Reducing ubuntu boot time using dmesg

The boot time is 141 seconds. Here's the most interesting parts of dmesg command: [ 2.870498] usb 1-1.2: new high-speed USB device number 5 using ehci_hcd [ 80.669210] ADDRCONF(NETDEV_UP): eth0: ...
1
vote
2answers
2k views

Cannot get Realtek r8168 ethernet card up

I've working on Arch Linux and in 99% of time I connect to internet by WLAN but sometimes I need to use ethernet connection, so today I see something strange. My eth0 device is down, and I can't get ...
0
votes
1answer
92 views

Network Disabled

I have just installed ubuntu server edition in order to create a home network. But I am not able to find IP of the machine through ifconfig (showing only localhost). Then I tried lspci | grep -i ...
3
votes
2answers
250 views

Network issue in vsat

In my server-client architecture, I multicast 100 MB files to many clients from server via satellite link. Network traversal is through 5 hops. I have the 10Mbps ( i.e. 1250 Kilo Byte per second ) ...
1
vote
1answer
487 views

Display all network interfaces on Solaris

On Linux, the command mii-tool displays the list of Ethernet interfaces and other information. What equivalent command existson Solaris? My goal is to view all LAN networks that my Solaris machine is ...
0
votes
0answers
642 views

Multiple subnets on multiple virtual interfaces with one physical interface

I have a Ubuntu pc with one interface -- eth0 -- which is connected to an unmanaged switch which is linked to two subnets: 192.168.0.0/24 and 192.168.1.0/24. I want to have two virtual interfaces with ...
1
vote
2answers
3k views

Configure a bridged Ethernet adapter in a VirtualBox guest running Scientific Linux

I installed Scientific Linux 6.2 x86 in VirtualBox on Windows 7 x64. The adapter is Adapter 1: Paravirtualized Network (Bridged adapter, Marvell Yukon 88E8056 PCI-E Gigabit Ethernet Controller) ...
1
vote
0answers
260 views

Configuring multiple static IP addresses for a disk image

Using Ubuntu 10.04 I'm using Clonezilla to create and install a customized image. I'd like to be able to set up multiple static IP addresses. For example, I'd like the first interface to have the IP ...
2
votes
1answer
388 views

Fedora 15: em1 recently dissapeared and hostapd no longer serves internet to wirelessly connected devices

I have a laptop running hostapd, phpd, and mysql. This laptop uses an Ethernet connection to connect to the internet and acts as a wireless access point for my workplace's wifi devices. After ...
1
vote
1answer
308 views

routing between two private networks (NICs)

I have two private networks say: 10.0.1.0/8 and 192.168.0.0/24 I have two machines with two NICs per each machine. machine1 NIC1: 192.168.0.10 machine1 NIC2: 10.0.1.10 machine2 NIC1: 192.168.0.11 ...
4
votes
2answers
1k views

changing the names of network interfaces, debian wheezy

I'm trying to set a name for an interface, "ethLan" instead of eth0. Doing so also ensures that the if's name will remain consistent at every reboot and kernel. I did find some articles in the ...
3
votes
1answer
3k views

Check whether network cable is plugged in without bringing interface up

I am trying to identify NICs on ~20 remote servers (2-6 NICs on every server). To begin with, I want to identify those ready for use and free ones. How can I check the state of the physical media? I ...
2
votes
1answer
210 views

How can I update the OUI list used for Netdiscover?

Netdiscover keeps showing a lot of "Unknown vendor" devices, when I generally can find the vendor pretty quickly via Google. Is there any way to manually update whatever OUI list Netdiscover uses?
2
votes
1answer
320 views

Is vnstat reporting accurate?

I'm checking the stats of a busy site that host mirror downloads. I installed vnstat on the machine and after a few days i saw the number 125.25 Mbit/s or using -ru 0 15.29 MiB/s I'm extremely ...
2
votes
1answer
763 views

Atheros ar8151 driver for kernel 3.x (fedora 16)

Yesterday, I installed Fedora 16 and found no wireless connection available. Then I found the ar81family driver But it seems like it does not work with kernel 3. I changed the makefile to ignore ...
6
votes
2answers
218 views

How can I test the current carrier state for an ethernet adapter in Linux?

In Arch Linux, how can I check if a network device (say eth0) has a carrier signal present?
8
votes
1answer
498 views

what level of the network stack does tcpdump get its info from?

As I was trying in vain to fix a faulty ethernet controller here, one thing I tried was running tcpdump on the machine. I found it interesting that tcpdump was able to detect that some of the ICMP ...
-2
votes
1answer
235 views

How Can I “CAM attack” a switch/router?

Does someone has any script that can "CAM attack" a switch/router, so that it will act as a HUB? Are there any tools for it in the repositories?
1
vote
0answers
371 views

Network fail on FreeBSD: Ping to router fails, but router believes computer is connected

I have a TP-Link TL-WN851N wireless adapter, which is based on an Atheros device. When I attempt to connect to my WPA2 wireless network, ifconfig wlan0 tells me that the connection is 'associated'. My ...
2
votes
1answer
802 views

eth0 r8169 down on wake up from standby

On waking up after standby the network (eth0) remains down. The eth0 card is r8169. I have tried : ifconfig eth0 up Doesn't work ifconfig eth0 up; dhcpcd eht0 Worked but how do I configure my ...
4
votes
2answers
569 views

802.3ad on FreeBSD and Linux using crossover cables?

I have setup a NFS server on FreeBSD 8.1, which will be serving one Linux client. Each box has a dual-port 1gig fiber card, and each box is directly connected to the other over this link. There is ...
3
votes
2answers
405 views

PPC Debian: eth0: switching to forced 10bt / 100bt

I recently installed debian on an old G4 iMac, and everything is working fine except that the console is constantly spammed with alternating eth0: switching to forced 10bt eth0: switching to forced ...