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Questions tagged [interface]

333 questions
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What is this virtual interface? And how can I remove it?

I am using RHEL 7.4 and had both a virbr0 and virbr1. I want to remove them both. I was able to remove virbr0 by stopping and disabling the default virtual kvm. libvirtd isn't running, yet I still have virbr1. Initially I followed…
RenegadeAndy
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Bandwidth limitations of network loopback device?

I have several JVMs that all listen to TCP 80 each bound on their own 127.0.100.1 -> 127.0.100.255 range. Is there a theoretical limit to the effective bandwidth that can be pushed through the LO device? Is this simply a limitation of the kernel…
Jé Queue
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Tap interface is not receiving packets

I'm configuring a tap interface and trying to send and receive packets through it, i configure it like this: ip tuntap add name tap0 mode tap multi_queue ip link set tap0 up i'm using scapy to send traffic to the interface, the command is : p =…
Kareem Khaleel
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Application iptables rule with virtual interfaces

If I have two or more network interfaces, ranging from virtual and real, as it could to set iptables rules to affect all of these interfaces? Example: I have four interfaces, eth0, eth0:0, eth1 and loopback, I want to set the following…
SoabTI
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CentOS 7 statically configured network adapter keeps getting DHCP address

This is driving me nuts. I have a CentOS 7 system. It is acting as DHCP for the network it is attached to, is running Cobbler and PXE, but it is not the gateway. It is the primary file server for my network. I have an on-board network adapter…
Locane
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FreeBSD interface up/down monitoring

How to get informed about specific interface status in FreeBSD? ifconfig | grep "status: active" works fine but I want to avoid polling and be informed as fast as possible about ifup/ifdown.
DmitryBond
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Debian Linux routing additional IP to LXC

I'm trying to route an additional IP of my server from Hetzner to a LXC instance (on Debian Jessie). I've found this guide http://www.jotschi.de/technik/2012/04/18/hetzner-lxc-linux-subnet-configuration.html and followed it. My problem is that as…
K.A.B.
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XenServer 6.2 changing mtu

So I've looked around for a way to change the MTU of interfaces on XenServer 6.2, but can't find anything that works for me ... One method spoke about changing the ifcnfg-intX files in the /etc/sysconfig/network-scripts directory, but the files just…
Just Lucky Really
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Consistent Naming of 10gbps Interfaces on Dell Host

I have some Dell hosts in our environment. I would like to be able to provide consistent network interface naming across platforms. I know that biosdevname attempts to make the interfaces consistent with regard to their physical/hardware layout. But…
cheesesticksricepuck
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Cisco Switch went mad

tI have a Cisco SLM2048 Smart Switch which I can't access anymore. The switch is working just fine but: I can't reach it by web interface Doesn't seem to be able to reset it, even if I hold reset button for 10, 20, 30, 60 seconds. Doesn't get an…
Mateusz Kapusta
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Is there a way to get Apache to listen on an interface instead of an address?

This may be a bit of an X-Y question: I want to be able to clone and destroy cloud servers and not reconfigure the Listen directive for Apache that only the load balancer can get to. But I don't actually care what the ip address is – it's whatever…
kojiro
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4 answers

Bring up a virtual interface without checking if it's up elsewhere

Is there a way to bring up a virtual interface without it first sending an arping to check if that IP address is already in use elsewhere? I'm working with a proprietary product that recommends copying the ifup script and commenting out the arping…
Josh Smeaton
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Cisco Nexus: list all interfaces with their ips

This is the same as this question, but for Nexus: Junos: find out each interface's ip I need to show all interfaces with their respective IPs. I know that on IOS I can get that with show ip interface brief | exclude unassigned and on Junos with show…
Megaslav
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Is it possible plugging in a crossover cable to a 1Gb network adapter fried my adapter?

The host I am working with has two network adapters and is running Ubuntu Server 12.10. In an attempt to network two computers I used a cross-over cable as in the old 100Mbps days. After doing this I soon realized that you don't use crossover cables…
Ryan R.
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Problems bringing up a second virtual network interface

I'm having issues adding a second IP address to one interface. Below is my /etc/networking/interfaces # The loopback network interface auto lo iface lo inet loopback #eth0 is our main IP address auto eth0 iface eth0 inet static address…
nwalke
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