kernel-packages team mailing list archive

[Chris J Arges <1041070@xxxxxxxxxxxxxxxxxx>]

This is related to the bonding mode and _not_ a bug. The bonding module
will drop duplicate frames received on inactive ports, which is normal
behavior. [0] Overall the packets should be getting into the machine
without problems since they are received on the active slave. To confirm
this do the following

1) Check dropped packets from all interfaces. So if eth0/eth1 are connected to bond0, we may see dropped packets for bond0 and eth0, but not for eth1. This depends on which interface is the active interface. This can be checked using the following:
cat /sys/class/net/bond0/bonding/active_slave

So if the active_slave isn't dropping packets, and the inactive slave is
dropping packets this is normal in 'active-backup' mode (or any mode
where there is an inactive slave).

2) If we want both interfaces to not drop packets we can use 'all_slaves_active' bonding module parameter [0].
Check:
cat /sys/class/net/bond0/bonding/all_slaves_active, it should default to 0 which means drop frames on the inactive slave.

If we set this to 1, we will no longer drop frames:
echo 1 | sudo tee /sys/class/net/bond0/bonding/all_slaves_active

** Changed in: linux (Ubuntu)
       Status: Expired => Invalid

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https://bugs.launchpad.net/bugs/1041070

Title:
  802.3ad bond interface have show high RX dropped packets

Status in “bridge-utils” package in Ubuntu:
  Invalid
Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  On Ubuntu 12.04.1 LTS

  With the following networks settings:

  /etc/network/interfaces
  auto lo
  iface lo inet loopback

  auto eth0
  iface eth0 inet dhcp

  # Network: instances
  # Bonding
  auto eth2
  iface eth2 inet manual
      bond-master bond0
  auto eth4
  iface eth4 inet manual
      bond-master bond0

  auto bond0
  iface bond0 inet manual
      bond-mode 802.3ad
      bond-miimon 100
      bond-lacp-rate 1
      bond-slaves none

  The RX packets drop counter increase very fast:

  bond0     Link encap:Ethernet  HWaddr 00:10:18:e0:5e:a4
            inet6 addr: fe80::210:18ff:fee0:5ea4/64 Scope:Link
            UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
            RX packets:5912 errors:0 dropped:3223 overruns:0 frame:0
            TX packets:110 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:585020 (585.0 KB)  TX bytes:13804 (13.8 KB)

  All packages are up to date:

  uname -a
  Linux std006 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

  
  apt-cache policy ifenslave-2.6
  ifenslave-2.6:
    Installed: 1.1.0-19ubuntu5
    Candidate: 1.1.0-19ubuntu5
    Version table:
   *** 1.1.0-19ubuntu5 0
          500 http://10.5.0.1/ubuntu/ precise/main amd64 Packages
          100 /var/lib/dpkg/status
  ---
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  DistroRelease: Ubuntu 12.04
  Package: bridge-utils 1.5-2ubuntu6
  PackageArchitecture: amd64
  ProcEnviron:
   LANGUAGE=en_US:en
   TERM=xterm-256color
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
  Tags:  precise
  Uname: Linux 3.2.0-29-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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