Hi.
Server with two gigabit NIC's. I'm trying to setup a bridge with a
bonded device (2 links,balance-rr).
host# cat /etc/network/interfaces
auto lo
iface lo inet loopback
auto bond0
iface bond0 inet manual
slaves eth0 eth1
bond_mode balance-rr
bond_miimon 100
bond_updelay 200
bond_downdelay 200
auto br0
iface br0 inet static
address <ip>
netmask <netmask>
gateway <gateway>
bridge_ports bond0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
host# cat /etc/modprobe.d/bonding.conf
alias bond0 bonding
On this host I've created few kvm virtual machines. It's created with
next options.
host# virt-install \
--name="name" \
--ram=512 \
--arch=x86_64 \
--vcpus=1 \
--cpuset=0 \
--os-type=linux \
--os-variant="debiansqueeze" \
--hvm \
--virt-type kvm \
--accelerate \
--cdrom=/iso/debian-6.0.1a-amd64-netinst.iso \
--disk path=/dev/vg00/name,bus=virtio,cache=none,format=raw,sparse=false
\
--network bridge=br0,model=virtio \
--autostart
When I try to download a file I can see that the rate is very low:
guest# wget http://mirror.yandex.ru/archlinux/iso/2010.05/archlinux-2010.05-core-dual.iso
--2011-05-20 12:47:16--
http://mirror.yandex.ru/archlinux/iso/2010.05/archlinux-2010.05-core-dual.iso
Resolving mirror.yandex.ru... 213.180.204.183, 2a02:6b8:0:201::1
Connecting to mirror.yandex.ru|213.180.204.183|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 691011584 (659M) [application/x-iso9660-image]
Saving to: Б-°archlinux-2010.05-core-dual.isoБ-?
0% [
] 79,686 7.97K/s eta 20h 24m
But, if i try to get this file from host machine, I can see that the
rate is normal:
host# wget http://mirror.yandex.ru/archlinux/iso/2010.05/archlinux-2010.05-core-dual.iso
--2011-05-20 08:56:35--
http://mirror.yandex.ru/archlinux/iso/2010.05/archlinux-2010.05-core-dual.iso
Resolving mirror.yandex.ru... 213.180.204.183, 2a02:6b8:0:201::1
Connecting to mirror.yandex.ru|213.180.204.183|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 691011584 (659M) [application/x-iso9660-image]
Saving to: Б-°archlinux-2010.05-core-dual.isoБ-?
21% [=================================>
] 150,837,182 26.5M/s eta 24s
If I broke bonding in the host machine and try to setup bridging on
device eth0 without bonding, the rate in both host and virtual machine
is normal.
Host machine:
CPU: model name : Intel(R) Xeon(R) CPU E5504 @ 2.00GHz
KVM:
# dpkg -l | grep kvm
ii qemu-kvm 0.12.5+dfsg-5+squeeze1
Full virtualization on x86 hardware
Kernel:
# uname -a
Linux unixmon 2.6.32-5-amd64 #1 SMP Mon Mar 7 21:35:22 UTC 2011 x86_64 GNU/Linux
Guests:
All guest - GNU/Debian 6.0.1a amd64 with 2.6.32-5-amd64 #1 SMP Mon Mar
7 21:35:22 UTC 2011 x86_64 GNU/Linux kernel
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