Hello,
I've been playing around with KVM since few years.
But now I'm wondering is it possible to mix bonding+bridging together to
reach more than single Gigabit link between Client and VM?
Looking over net, everyone says to use LACP.. but I did it already and
it worked, but still at 1 NIC speed.
This is my working setup on Debian Squeeze 64bit:
*cat /proc/net/bonding/bond0*
/Ethernet Channel Bonding Driver: v3.5.0 (November 4, 2008)
Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 200
Down Delay (ms): 200
Slave Interface: eth1
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:11:22:33:44:55
Slave Interface: eth2
MII Status: up
Link Failure Count: 0
Permanent HW addr: 55:44:33:22:11:00/
*cat /etc/network/interfaces*
/auto lo
iface lo inet loopback
# The bonded network interface for LAN
auto bond0
iface bond0 inet manual
bond-slaves none
bond-mode balance-rr
bond-miimon 100
#bond_lacp_rate fast
#bond_ad_select 0
arp_interval 80
up /sbin/ifenslave bond0 eth1 eth2
down /sbin/ifenslave bond0 -d eth1 eth2
#Onboard NIC #1 Nvidia Gigabit
auto eth1
iface eth1 inet manual
bond-master bond0
#NIC #2 Intel PRO/1000 F Server Adapter - FIBER
auto eth2
iface eth2 inet manual
bond-master bond0
# Bridge to LAN for virtual network KVM
auto br0
iface br0 inet static
address 10.0.0.250
netmask 255.255.255.0
network 10.0.0.0
broadcast 10.0.0.255
gateway 10.0.0.249
dns-nameservers 10.0.0.249 8.8.8.8
bridge-ports bond0
bridge-fd 9
bridge-hello 2
bridge-maxage 12
bridge-stp off
#NIC #3 - modem
auto eth0
iface eth0 inet manual
#Bridge LAN to virtual network KVM - modem
iface br1 inet manual
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
metric 1
auto br1/
*cat /etc/modprobe.d/bonding.conf*
/alias bond0 bonding
options bonding mode=balance-rr miimon=100 downdelay=200 updelay=200
arp_interval=80/
I've tried following already (single switch, not multiple):
- LACP in Debian + LACP on the switch
- static bond0 (round-robin) + static link aggregation on the switch for
both Client and Hypervisor
- tried several switches (HP V1910, 3Com 3824 and Planet GSD-802S)
- tried several NICs, including Intel PRO/1000 F and MF fiber adapters
- for example I can reach ~1,9Gbit between two non-virtualised servers
using 3Com 3824 and NO link aggregation configured on the switch
- I already reached almost native (940Mbit/s) from Client to VM using
virtio-net and Debian.
- tests using iperf, iSCSI, NFS. To avoid I/O limits - using ramdisks.
Questions:.
- is it even possible?
- maybe I have to create MORE bridge interfaces, one per NIC and set up
aggregated link inside VM then?
- can bridge interface limit bandwidth to 1Gbit?
Regards,
Tom
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