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Bug#699269: IPv6 slow and hangs over failed bonding link




Package: linux
Version: 3.2.0-2-amd64
Debian: wheezy

Two ethernet interfaces configured in bond0: (/etc/network/interfaces)

auto bond0
iface bond0 inet manual
slaves eth0 eth1
bond-mode 2
bond-miimon 100
bond-downdelay 200
bond-updelay 200
post-up ifup br576 br575 br200

# bond for VLAN 576
iface bond0.576 inet manual
vlan-raw-device bond0

...
# bridge for VLAN 576
iface br576 inet static
address 10.aa.bb.ccc
netmask 255.255.255.0
gateway 10.aa.bb.1
bridge_ports bond0.576

# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 5c:f3:fc:e8:f7:2c
          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:649488417 errors:0 dropped:596 overruns:0 frame:0
          TX packets:202543329 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
RX bytes:183874888286 (171.2 GiB) TX bytes:218589908962 (203.5 GiB)
          Interrupt:28 Memory:92000000-92012800

# ifconfig eth1
eth1      Link encap:Ethernet  HWaddr 5c:f3:fc:e8:f7:2c
          UP BROADCAST SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:267380523 errors:0 dropped:0 overruns:0 frame:0
          TX packets:485869424 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
RX bytes:195512508769 (182.0 GiB) TX bytes:671896844116 (625.7 GiB)
          Interrupt:40 Memory:94000000-94012800


One ethernet cable was disconnected, before planned reconfiguration works: (dmesg)

[21698247.247121] bonding: bond0: link status down for interface eth1, disabling it in 200 ms. [21698247.446804] bonding: bond0: link status definitely down for interface eth1, disabling it

ifconfig eth1still shows it up.
HP Procurve Gigabit switch configured as multilink trunk.
Everything worked when both cables were connected.

VirtualBox machine is running using bridged interface br576

I tried to copy large file over NFS4 / IPv6 and it freeze to very low speed. cp command hung, and we had to reboot virtual machine, as it was hanging. at destination NFS server file was growing but slowly.
tcpdump showed short bursts of data and then again 5-15 seconds nothing.

After reboot i reproduced this behaviour using "scp":
scp to ipv6 address:

daily-backup-2012_10_31.zip 0% 2704KB 374.7KB/s - stalled -

scp to ipv4 address:
daily-backup-2012_10_31.zip 100% 3243MB 10.3MB/s 05:15


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