[Bug 889423] Re: 802.3ad bonding not configured correctly

Fri Dec 2 01:36:59 UTC 2011

Hmm, ok, I'm a bit surprised that bond0 still doesn't get added to the
bridge.

What's supposed to happen with that new ifenslave at boot time is:
1) One of the network card gets detected and sends a udev event
2) Upstart picks up the event and brings up the interface
3) As the interface is part of a bond, bond0 is brought up first
4) Usually around that time, the second interface is detected and also triggers upstart
5) This card is put on hold waiting for the bond to be ready
6) bond0 is done initialising
7) The first network card is added as a slave
8) bond0 is now up and ready with one slave and can be bridged from this point on
9) The second network card is added as a slave
10) All of eth0, eth1 and bond0 are now up and working
11) At some point later in the boot sequence, "ifup -a" is called by the networking.conf upstart job, creating br0.

So it's not completely impossible that 11) actually happens before 8)
but that'd most likely be cause by something taking a lot longer than it
should when initialising the bond or the interfaces.

Did you happen to see brctl's error message?
It could be two things:
1) Complaining that bond0 doesn't exist
2) Saying Operation not permitted, meaning that bond0 exists but has no slaves and so no mac address at this point

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https://bugs.launchpad.net/bugs/889423

Title:
  802.3ad bonding not configured correctly

Status in “ifupdown” package in Ubuntu:
  Confirmed

Bug description:
  Configuring an 802.3ad bond doesn't appear to work correctly. The following entry in /etc/network/interfaces should configure an 802.3ad bond between interfaces eth2 and eth3:
  #auto bond0
  iface bond0 inet static
    address 10.191.62.2
    netmask 255.255.255.0
    broadcast 10.191.62.255
    bond-slaves eth2 eth3
    bond-primary eth2 eth3
    bond-mode 802.3ad
    bond-lacp_rate fast
    bond-miimon 100

  However, after booting the system, we have:
    # ifconfig -a
    bond0     Link encap:Ethernet  HWaddr 00:1b:21:b7:21:ea
              inet addr:10.191.62.2  Bcast:10.191.62.255 Mask:255.255.255.0
              inet6 addr: fe80::21b:21ff:feb7:21ea/64 Scope:Link
              UP BROADCAST MASTER MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0
              RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

    eth2      Link encap:Ethernet  HWaddr 00:1b:21:b7:21:ea
              UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
              Memory:b2420000-b2440000

    eth3      Link encap:Ethernet  HWaddr 00:1b:21:b7:21:ea
              UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
              Memory:b2400000-b2420000
    # cat /proc/net/bonding/bond0
    Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

    Bonding Mode: IEEE 802.3ad Dynamic link aggregation
    Transmit Hash Policy: layer2 (0)
    MII Status: down
    MII Polling Interval (ms): 100
    Up Delay (ms): 0
    Down Delay (ms): 0

    802.3ad info
    LACP rate: fast
    Aggregator selection policy (ad_select): stable
    bond bond0 has no active aggregator

    Slave Interface: eth2
    MII Status: up
    Speed: 1000 Mbps
    Duplex: full
    Link Failure Count: 1
    Permanent HW addr: 00:1b:21:b7:21:ea
    Aggregator ID: N/A
    Slave queue ID: 0

    Slave Interface: eth3
    MII Status: up
    Speed: 1000 Mbps
    Duplex: full
    Link Failure Count: 1
    Permanent HW addr: 00:1b:21:b7:21:eb
    Aggregator ID: N/A
    Slave queue ID: 0

  If I do the following:
    # ip link set dev bond0 up
    # ifenslave bond0 eth2 eth3
    # ifconfig bond0 10.191.62.2 netmask 255.255.255.0
  I get:
    # ifconfig bond0
    bond0     Link encap:Ethernet  HWaddr 00:1b:21:b7:21:ea
              inet addr:10.191.62.2  Bcast:10.191.62.255 Mask:255.255.255.0
              inet6 addr: fe80::21b:21ff:feb7:21ea/64 Scope:Link
              UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
              RX packets:17 errors:0 dropped:17 overruns:0 frame:0
              TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0
              RX bytes:2108 (2.1 KB)  TX bytes:3126 (3.1 KB)

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

    Bonding Mode: IEEE 802.3ad Dynamic link aggregation
    Transmit Hash Policy: layer2 (0)
    MII Status: up
    MII Polling Interval (ms): 100
    Up Delay (ms): 0
    Down Delay (ms): 0

    802.3ad info
    LACP rate: fast
    Aggregator selection policy (ad_select): stable
    Active Aggregator Info:
            Aggregator ID: 1
            Number of ports: 2
            Actor Key: 17
            Partner Key: 24
            Partner Mac Address: 00:04:96:18:54:d5

    Slave Interface: eth2
    MII Status: up
    Speed: 1000 Mbps
    Duplex: full
    Link Failure Count: 0
    Permanent HW addr: 00:1b:21:b7:21:ea
    Aggregator ID: 1
    Slave queue ID: 0

    Slave Interface: eth3
    MII Status: up
    Speed: 1000 Mbps
    Duplex: full
    Link Failure Count: 0
    Permanent HW addr: 00:1b:21:b7:21:eb
    Aggregator ID: 1
    Slave queue ID: 0

  I can ping 10.191.62.2 after making the above changes. So, either I am
  configuring /etc/network/interfaces incorrectly or ifupdown/ifenslave
  is doing the wrong thing.

  Note also the number of dropped packages on bond0. Why should I see
  any dropped packages on the bond0 interface?

  DistroRelease: Ubuntu 11.10
  Package: ifupdown 0.7~alpha5.1ubuntu5
  PackageArchitecture: amd64
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 3.0.0-12.20-server 3.0.4
  SourcePackage: ifupdown
  Uname: Linux 3.0.0-12-server x86_64

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