The Juju bridge script, when creating the bridge device, generally
leaves all iface options as it found them.
For example:
auto eth1.16
iface eth1.16 inet static
address 10.245.184.100/24
vlan-raw-device eth1
mtu 1500
vlan_id 16
becomes the following:
iface eth1.16 inet manual
address 10.245.184.100/24
vlan-raw-device eth1
mtu 1500
vlan_id 16
auto br-eth1.16
iface br-eth1.16 inet static
address 10.245.184.100/24
mtu 1500
bridge_ports eth1.16
bridge_stp off
bridge_maxwait 0
Note: It doesn't propagate any bond options.
For example:
auto eth0
iface eth0 inet manual
bond-lacp_rate slow
bond-xmit_hash_policy layer2
bond-miimon 100
bond-master bond0
mtu 1500
bond-mode active-backup
[ skipping eth1 for clarity ]
auto bond0
iface bond0 inet dhcp
bond-lacp_rate slow
bond-xmit_hash_policy layer2
bond-miimon 100
mtu 1500
bond-mode active-backup
hwaddress 52:54:00:1c:f1:5b
bond-slaves none
becomes the following when bridged:
auto eth0
iface eth0 inet manual
bond-lacp_rate slow
bond-xmit_hash_policy layer2
bond-miimon 100
bond-master bond0
mtu 1500
bond-mode active-backup
auto bond0
iface bond0 inet manual
bond-lacp_rate slow
bond-xmit_hash_policy layer2
bond-miimon 100
mtu 1500
bond-mode active-backup
hwaddress 52:54:00:1c:f1:5b
bond-slaves none
dns-nameservers 10.17.20.200
dns-search maas19
auto br-bond0
iface br-bond0 inet dhcp
mtu 1500
hwaddress 52:54:00:1c:f1:5b
bridge_ports bond0
bridge_stp off
bridge_maxwait 0
dns-nameservers 10.17.20.200
dns-search maas19
I generally propagated the existing options when creating the bridge
device. Should MTU be an exception now?
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https://bugs.launchpad.net/bugs/1565804
Title:
ifup of vlan interfaces failing during networking start - RTNETLINK
answers: File exists
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