Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #227137

Re: libvirt guest bridge configuration

Show all headers | View raw

On 9/18/20 7:08 PM, Lucio Crusca wrote:
> I'm trying to bridge a network interface between host and guest (both 
> Debian Buster+Bullseye+Sid) so that NAT is not needed.
>
> In the host /etc/network/interfaces I've declared a bridge like this:
>
> auto eno1
> iface eno1 inet static
>   address 2.4.6.8
>   netmask 255.255.255.224
>   gateway 2.4.6.1
>   up route add -net 2.4.6.0 netmask 255.255.255.224 gw 2.4.6.1 dev eno1
>
>
> auto virbr-dummy
> iface virbr-dummy inet manual
>     pre-up /sbin/ip link add virbr-dummy type dummy
>     up /sbin/ip link set virbr-dummy address 52:54:00:f0:37:ba
>
>
> auto virbr10
> iface virbr10 inet static
>     bridge_ports virbr-dummy
>     bridge_stp on
>     bridge_fd 2
>     address 2.4.6.73
>     netmask 255.255.255.224
>     gateway 2.4.6.65
>     broadcast 2.4.6.95
>     up route add -net 2.4.6.64 netmask 255.255.255.224 gw 2.4.6.65 dev 
> eno1
>
> Please note that 2.4.6.x are not my real IP addresses, but I've been 
> really assigned 2 IP addresses and I want to use one for the host and 
> the other for the guest.
>
> Until here it seems to work in that I can ping both addresses. However 
> I don't know how I should configure my guest VM interface. There is no 
> nat, no DHCP and if I specify the same IP address for the virtualized 
> interface as the host bridge it's connecting to, it doesn't even 
> detect any link.
>
> The guest was created with:
>
> # virt-install --network bridge=virbr10,model=virtio ...
>
> Please help.
>
I really can't understand why all that.

You just need a bridge interface and share the network.

brctl addbr br1

ip addr add 172.50.50.10/24 dev br1  #  Host

Add a interface in your guest on br1.

ip addr add 172.50.50.11/24 dev ${IF_GUEST} # Guest


That works fine,

Check your firewall for allow/deny rules.



-- 
Lucas Castro

Back to linux.debian.user | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

libvirt guest bridge configuration Lucio Crusca <lucio@sulweb.org> - 2020-09-19 00:20 +0200
  Re: libvirt guest bridge configuration Dan Ritter <dsr@randomstring.org> - 2020-09-19 01:00 +0200
    Re: libvirt guest bridge configuration Lucio Crusca <lucio@sulweb.org> - 2020-09-19 08:30 +0200
      Re: libvirt guest bridge configuration Fabien Roucaute <fabien.roucaute@free.fr> - 2020-09-19 10:10 +0200
        Re: libvirt guest bridge configuration Reco <recoverym4n@enotuniq.net> - 2020-09-19 10:20 +0200
        Re: libvirt guest bridge configuration Lucio Crusca <lucio@sulweb.org> - 2020-09-19 10:30 +0200
          Re: libvirt guest bridge configuration Fabien Roucaute <fabien.roucaute@free.fr> - 2020-09-19 10:50 +0200
            Re: libvirt guest bridge configuration Lucio Crusca <lucio@sulweb.org> - 2020-09-19 14:40 +0200
              Re: libvirt guest bridge configuration Fabien Roucaute <fabien.roucaute@free.fr> - 2020-09-19 15:30 +0200
                Re: libvirt guest bridge configuration Lucio Crusca <lucio@sulweb.org> - 2020-09-19 16:10 +0200
                Re: libvirt guest bridge configuration Fabien Roucaute <fabien.roucaute@free.fr> - 2020-09-19 16:50 +0200
                [SOLVED] Re: libvirt guest bridge configuration Lucio Crusca <lucio@sulweb.org> - 2020-09-20 12:10 +0200
                Re: [SOLVED] Re: libvirt guest bridge configuration Lucas Castro <lucas@gnuabordo.com.br> - 2020-09-21 20:20 +0200
  Re: libvirt guest bridge configuration john doe <johndoe65534@mail.com> - 2020-09-19 18:40 +0200
  Re: libvirt guest bridge configuration Lucas Castro <lucas@gnuabordo.com.br> - 2020-09-19 23:30 +0200

csiph-web