Hi there,

I'd like to use DHCP-Address configation on my bridged network interfaces

/etc/network/interfaces which i'd like to use:

auto lo
iface lo inet loopback

iface eth4 inet manual

iface eth5 inet manual

auto bond0
iface bond0 inet manual
        slaves eth4 eth5
        bond_miimon 100
        bond_mode 802.3ad
        mtu 9100


auto vmbr0
iface vmbr0 inet dhcp
               bridge_ports bond0
               bridge_stp off
               bridge_fd 0
               bridge_vlan_aware yes

When i reboot the server all options of the bridge are gone ( commented out ) and no address lease is received. Even if i put this config to /etc/network/interfaces.new . In the Debian-Wiki it is written that it should be possible to configure a bridge using dhcp:

https://wiki.debian.org/BridgeNetworkConnections :

"

 # This file describes the network interfaces available on your system
 # and how to activate them. For more information, see interfaces(5).

 # The loopback network interface
 auto lo br0
 iface lo inet loopback

 # Set up interfaces manually, avoiding conflicts with, e.g., network manager
 iface eth0 inet manual

 iface eth1 inet manual

 # Bridge setup
 iface br0 inet dhcp
    bridge_ports eth0 eth1

"

Our Cisco-Engineer wants to keep the switch configuration flexible in terms of MTU. That's why we'd like to use dhcp on the bridging interfaces.

Any suggestions to this phenomena?

Cheers,

Vadim

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