Ubuntu 14.04 bonding slaves stay down after boot

[Alex Gorbachev]

Hello, this is an Ubuntu 14.04.1 LTS server with kernel 3.16.6, setting up a bond of two 40 GbE NICs (Mellanox with the lastest OFED). Looks ike no matter what the order of the slaves is in /etc/network/interfaces, the bond does not bring these up:

Best regards, Alex Gorbachev

root@e2:~# cat /etc/network/interfaces
# 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
iface lo inet loopback

# 1GB interface for management
auto eth1
iface eth1 inet static
  address 192.168.168.224
  netmask 255.255.255.0
  gateway 192.168.168.203
  dns-nameservers 192.168.168.203

#First slave
auto eth2
iface eth2 inet manual
bond-master bond0

#Second slave
auto eth3
iface eth3 inet manual
bond-master bond0

# Bond
auto bond0
iface bond0 inet static
  address 10.10.20.224
  netmask 255.255.255.0
  bond-slaves none
  bond-mode balance-rr
  bond-miimon 100
  bond-downdelay 200
  bond-updelay 200

root@e2:~# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: load balancing (round-robin)
MII Status: down
MII Polling Interval (ms): 100
Up Delay (ms): 200
Down Delay (ms): 200

Slave Interface: eth3
MII Status: down
Speed: Unknown
Duplex: Unknown
Link Failure Count: 0
Permanent HW addr: f4:52:14:40:10:f1
Slave queue ID: 0

Slave Interface: eth2
MII Status: down
Speed: Unknown
Duplex: Unknown
Link Failure Count: 0
Permanent HW addr: f4:52:14:40:10:f0
Slave queue ID: 0

root@e2:~# dmesg|grep bond
[ 10.476483] bonding: Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
[ 11.546780] bonding: bond0: Setting MII monitoring interval to 100
[ 11.546799] bonding: bond0: Setting down delay to 200
[ 11.546812] bonding: bond0: Setting up delay to 200
[ 11.582857] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready
[ 11.582860] 8021q: adding VLAN 0 to HW filter on device bond0
[ 11.673348] bonding: bond0: interface eth2 does not exist!
[ 11.681719] bonding: bond0: interface eth3 does not exist!
[ 18.746452] bonding: bond0: Adding slave eth3
[ 18.794436] bonding: bond0: Enslaving eth3 as an active interface with a down link
[ 18.795687] bonding: bond0: Adding slave eth2
[ 18.828054] bonding: bond0: Enslaving eth2 as an active interface with a down link
[ 19.879933] bonding: bond0: Adding slave eth2
[ 19.879935] bonding: bond0: option slaves: unable to set because the bond device is up
[ 19.911741] bonding: bond0: Adding slave eth3
[ 19.911743] bonding: bond0: option slaves: unable to set because the bond device is up

[Alex Gorbachev (rwood-b)]

Update: following the info in http://unix.stackexchange.com/questions/128439/good-detailed-explanation-of-etc-network-interfaces-syntax this issue is resolved using the following modification. I believe this gives the NIC driver time to start and initialize properly, so then the bond slaves are in the up state:

#First slave
allow-hotplug eth2
iface eth2 inet manual
bond-master bond0

#Second slave
allow-hotplug eth3
iface eth3 inet manual
bond-master bond0

# Bond
auto bond0
iface bond0 inet static
  address 10.10.20.224
  netmask 255.255.255.0
  bond-slaves none
  bond-mode balance-rr
  bond-miimon 100
  bond-downdelay 200
  bond-updelay 200

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Michael Bolanos (mbolanos)]

Hello,

Has this issue been resolved?