network interface bridge create

ear9mrn · 19. Mai 2020

I am trying to create an interface bridge.

I created the following 3 files with the associated content;

Code

/etc/systemd/network/br0.netdev

[NetDev]
Name=br0
Kind=bridge

/etc/systemd/network/bind.network

[Match]
Name=enx00e09700528f

[Network]
Bridge=br0

/etc/systemd/network/br0.network

[Match]
Name=br0

[Network]
DHCP=ipv4

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After reboot the bridge is created.

Code

7: br0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether fe:8b:43:6e:61:1c brd ff:ff:ff:ff:ff:ff

but.....

Code

# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.fe8b436e611c       no

no interface is present.

I can add it manually.

Code

# brctl addif br0 enx00e09700528f

# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.fe8b436e611c       no              enx00e09700528f

# ip addr
 br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether fe:8b:43:6e:61:1c brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.158/24 brd 192.168.1.255 scope global dynamic br0
       valid_lft 86358sec preferred_lft 86358sec
    inet6 fe80::fc8b:43ff:fe6e:611c/64 scope link
       valid_lft forever preferred_lft forever

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from what I can tell from syslog, the br0 interface is created before the real interface (enx00e09700528f) exists, race condition?.

Code

NetworkManager[746]: <info>  [1589894839.2892] manager: (br0): new Bridge device (/org/freedesktop/NetworkManager/Devices/8)
May 19 14:27:19 mediavault systemd-udevd[3833]: Using default interface naming scheme 'v240'.
May 19 14:27:19 mediavault systemd-udevd[3833]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.
May 19 14:27:19 mediavault systemd-networkd[3832]: br0: netdev ready
May 19 14:27:19 mediavault systemd-networkd[3832]: Enumeration completed
May 19 14:27:19 mediavault systemd[1]: Started Network Service.
May 19 14:27:19 mediavault kernel: [ 1501.327338] IPv6: ADDRCONF(NETDEV_UP): br0: link is not ready
May 19 14:27:19 mediavault avahi-daemon[747]: Withdrawing address record for 192.168.1.225 on enx00e09700528f.
May 19 14:27:19 mediavault avahi-daemon[747]: Leaving mDNS multicast group on interface enx00e09700528f.IPv4 with address 192.168.1.225.
May 19 14:27:19 mediavault avahi-daemon[747]: Interface enx00e09700528f.IPv4 no longer relevant for mDNS.
May 19 14:27:19 mediavault sh[1242]: sendto: Network is unreachable
May 19 14:27:19 mediavault sh[1242]: sendto: Network is unreachable
May 19 14:27:19 mediavault systemd-networkd[3832]: enx00e09700528f: DHCPv4 address 192.168.1.225/24 via 192.168.1.1
May 19 14:27:19 mediavault dbus-daemon[742]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.32' (uid=101 pid=3832 comm="/lib/systemd/systemd-networkd ")
May 19 14:27:19 mediavault avahi-daemon[747]: Joining mDNS multicast group on interface enx00e09700528f.IPv4 with address 192.168.1.225.
May 19 14:27:19 mediavault avahi-daemon[747]: New relevant interface enx00e09700528f.IPv4 for mDNS.
May 19 14:27:19 mediavault avahi-daemon[747]: Registering new address record for 192.168.1.225 on enx00e09700528f.IPv4.
May 19 14:27:19 mediavault systemd-networkd[3832]: enx00e09700528f: Configured
May 19 14:27:19 mediavault systemd[1]: Starting Hostname Service...
May 19 14:27:19 mediavault dbus-daemon[742]: [system] Successfull

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Question is, how do I get the nic interface to stick to the bridge at boot time.? or, is there a better way to create a bridged interface?

Thanks,

Pete.

votdev · 19. Mai 2020

I have not read the whole post, but you should use netplan.io which OMV is using to configure the network. Simply drop a file to /etc/netplan that should look like:

YAML

network:
  bridges:
    xxx

SaSsL77 · 19. Mai 2020

Hi,

I also had to set up a bridge for me and did it according to the following instructions ... that worked for me!

https://major.io/2015/03/26/cr…s-using-systemd-networkd/

greetings

ear9mrn · 19. Mai 2020

did as you suggest. Thanks for the pointer.

Code

# more /etc/netplan/30-bridge.yaml
network:
  bridges:
    br0:
      interfaces: [enx00e09700528f]
      macaddress: 00:e0:97:00:52:8f
      dhcp4: true
      dhcp6: no


# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.00e09700528f       no              enx00e09700528f
                                                        vnet0

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but I had to include the mac address (which is the same as the host adaptor mac address) to get this to work.

Developers.... Would it be possible to get a "create bridge" button on the network->interfaces tab and/or an option in omv-firstaid tool?

Thanks,

Pete.

Aux · 20. Mai 2020

I had everything configured with NetworkManager (nmtui).

ear9mrn · 21. Mai 2020

Zitat von SaSsL77

Hi,

I also had to set up a bridge for me and did it according to the following instructions ... that worked for me!

https://major.io/2015/03/26/cr…s-using-systemd-networkd/

greetings

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yea, I tried that but it did not work (see my first post). Reading the docs for networkd it say that files in /etc/networkd/network have precedent which means that I think the "real" adaptor is not up before we try and create the bridge.

Seeing as OMV uses netplan. I would suggest this should be the recommended method to achieve a working solution.

votdev · 21. Mai 2020

openmediavault 5.5.0 can manage bridges, see https://github.com/openmediavault/openmediavault/pull/715.

network interface bridge create

votdev 19. Mai 2020

Jetzt mitmachen!

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