Questions tagged [macvlan]
The macvlan tag has no usage guidance.
22
questions
1
vote
1
answer
94
views
Macvtap connectivity lost after a few hours?
I setup a macvtap interface like this:
ip link add link eth0 vlan type macvlan mode bridge
ip address add 10.0.0.17 dev vlan
ip link set dev vlan up
ip route flush dev eth0
ip route flush dev vlan
ip ...
- 189
0
votes
0
answers
318
views
virt-manager network options or virtual network interfaces
I want to ask about network options on virt-manager. I used to have the options shown in the given picture https://i.stack.imgur.com/P4SYR.jpg
host device eth0 : macvtap
host device wlan0 : macvtap
...
1
vote
1
answer
144
views
systemd networkd and/or resolved blocking receiving (raw) packets on virtual network interface?
While working on some unit test code that basically sends raw Ethernet packets from one MACVLAN to another MACVLAN (virtual) network interface I noticed that most of the time the test code fails to ...
- 1,237
0
votes
0
answers
127
views
macvlan device do not honor smaller mtu than physical device
I have a use case to create multiple MACVLAN devices from the same physical ethernet device. The requirement is also that some MACVLANs could offer jumbo packets (MTU=9215) and some disallow jumbo ...
- 101
0
votes
1
answer
1k
views
macvlan + vlan configured interface does ignore vlan tags
I need to config two different MAC and IP addresses on the same physical device (eth1).
But when I configure a macvlan interface in the default/global namespace and configure a vlan on top of it. I ...
1
vote
1
answer
742
views
How to correctly setup DNS for a macvlan in a namespace (ping IP works, ping URL does not)?
I have set up macvlan in a namespace on a server. I can ping accross default namespace and macvlan namespace, i can even ping the macvlan namespace from any other client in the LAN.
But DNS is not ...
- 439
3
votes
1
answer
880
views
Neighbour advertisement messages not coming from sub interface linux
I created a macvlan interface with eth0 as the parent interface. I can see NS for eth0 and NA msgs from eth0 but not for macvlan interface.
However when I ping the gateway from macvlan, then NS msgs ...
- 31
4
votes
1
answer
1k
views
Create additional IP address in a separate network namespace
I'm running Ubuntu 18.04, Linux kernel 5.4.0. My laptop has local IP address 192.168.0.130:
$ sudo ip addr show dev wlp2s0
3: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue ...
- 1,051
1
vote
0
answers
259
views
how to create FTP server in namespace
Lets say i created two namespace in Ubuntu.
ip netns add A
ip netns add B
now create Macvlan corresponding to each namespaces
ip link add macvlanA link wlo1 type macvlan mode bridge
ip link set ...
- 11
0
votes
1
answer
691
views
Why I can't ping between two siblings macvlans in bridge mode?
In a Ubuntu 20.04 machine connected to my home LAN, I created macvlans under my ethernet device:
$ sudo ip link add macvlan1 link enp37s0 type macvlan mode bridge
$ sudo dhclient macvlan1
$ sudo ip ...
- 531
1
vote
0
answers
328
views
Use macvlan to emulate multiple hardware devices on network
I am trying to use linux's network name spaces to emulate multiple devices on my local network. I want this to appear as actual network devices, not my laptops IP masquerading on the subnet. Is this ...
- 11
0
votes
1
answer
2k
views
Linux Interface Mode MACVLAN with Private mode doesn't seem to work as advertised (Ubuntu)
I am trying to create virtual interfaces (type MACVLAN) such that all communication between the interfaces is sent out of the host towards the eternal default gateway. There is plenty of writeups ...
- 1
3
votes
1
answer
351
views
Traffic shaping using tc-netem on macvlan
I am setting up a virtual network using macvlans and I have connected traffic-control tc to each of them. I set the delay for each as 90ms. But on ping I get the time of 0.02 seconds. Why is tc not ...
- 141
2
votes
0
answers
667
views
OpenWRT hairpin L2 traffic
I have an OpenWRT Router with embedded switch.
I have a KVM machine with macvtap network access.
I need guest to host communication.
By connecting the host to my Cisco switch hairpin traffic is ...
- 21
3
votes
1
answer
2k
views
systemd-nspawn/machinectl and macvlan
I would like to create a nspawn container connected to the network via macvlan and dhcp. All documentation I have found were very instructive but did not offer a step by step procedure for this setup.
...
- 31
1
vote
2
answers
2k
views
Slowing down a server with traffic shaping
I would like to study the behaviour of an application streaming from a slow server. I'm trying to take advantage of tc-netem to introduce a network delay.
Before setting up a more complicated ...
- 558
4
votes
2
answers
6k
views
How to make reachable macvlan aliases in a different namespaces?
I have
an interface, name eth0, in my main network namespace
another interface, name jail0, in an alternate network namespace (name name0). This namespace is used by a jailed environment.
jail0 is a ...
- 9,671
3
votes
1
answer
2k
views
Communication problem between macvlan interfaces when sockets are bound to devices
I have a Linux setup where two macvlan interfaces in mode bridge are added on the same physical interface, in the same IP subnet:
ip link add link eth2 dev mvl0 type macvlan mode bridge
ip link add ...
- 606
2
votes
2
answers
3k
views
Script to create macvlan bridge on the host doesn't work unless it's run twice
I have a script that should create a macvlan bridge in the host when it starts up. The host is an up-to-date Arch Linux. This is intended to allow host and guest to share the same network *and talk to ...
- 1,092
2
votes
0
answers
549
views
Priority routing with macvtap bridges
I have a machine with 2 ethernet cards. One with single interface, one with 4.
I intend to use the single interface card (which is should be connected to my LAN) as the means of accessing (ssh etc) ...
- 317
2
votes
0
answers
849
views
Dedicate one physcial port to one virtual port in proxmox without libvirt
I simply need to dedicate 1 host physical port to 1 virtual port of guest without help of libvirt.
Host has:
2 physical interfaces: eth0 and eth1
1 virtual bridge(vmbr0), that include virtual ...
2
votes
0
answers
2k
views
macvlan-network device doesn't communicate outside host from within a container
I am attempting to erect a set of Docker or LXC containers, each with their own routable IP address. The containing host is actually a VM running within RedHat Enterprise Virtualization, which is a re-...
- 6,078