On 02/07/2011 01:27 PM, Volker Cordes wrote:
Avi Kivity<avi<at> redhat.com> writes: > > On 02/07/2011 11:51 AM, Volker Cordes wrote: > > Hello, > > > > I'm running 4 virtual machines on one host, connected by a network > > bridge on the host (IP 192.168.0.1). All TAP devices get added to that > > bridge when starting the vm: > > > > brctl show > > bridge name bridge id STP enabled interfaces > > br0 8000.52fd3fbd954e no tap01 > > tap02 > > tap03 > > tap04 > > > > I use virtio networking (but tried the e1000 driver, too). The vms have > > static IPs 192.168.0.250 - 253 with 192.168.0.1 as the gateway. > > Connecting from the host to the machines and from the machines to the > > internet works just fine. The problem lies in connecting from one > > machine to another. There is a 30 seconds delay until the connection > > gets established, I tried ssh, http and mysql. After the connection is > > there, the speed seems to be normal. > > > > Any hints would be appreciated. > > > > Does > > brctl setfd br0 0.5 > > help? > No does not help. The bridge is created in /etc/network/interfaces (debian): iface tap0 inet manual auto br0 iface br0 inet static bridge_ports tap0 bridge_stp off bridge_maxwait 0 bridge_fd 0 address 192.168.0.1 netmask 255.255.255.0 I'm using kvm version: QEMU emulator version 0.13.0 (qemu-kvm-0.13.0 Debian 0.13.0+dfsg-2), Copyright (c) 2003-2008 Fabrice Bellard with kvm_intel on kernel: Linux example.com 2.6.32-5-amd64 #1 SMP Wed Jan 12 03:40:32 UTC 2011 x86_64 GNU/Linux I also tried -no-kvm, -no-kvm-irqchip and -no-kvm-pit. Didn't help. Even connecting to the local machine has this 30 seconds delay (only if I use 192..., localhost is ok)
Check reverse dns resolution and firewall rules. Don't seem to be a kvm problem.
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