[Qemu-devel] [qemu-devel] ssh connection failed to qemu vm

[李春奇]

Hi all,

I install qemu from git repository with KVM, and connect network with bridge. The connection to the vm sometimes cannot establish.

The network configure of host OS is here:

address@hidden:~/qemu.git# ifconfig

br0       Link encap:Ethernet  HWaddr 00:26:b9:fa:de:48  

          inet addr:10.0.0.2  Bcast:10.0.0.255  Mask:255.255.255.0

          inet6 addr: 2001:da8:201:1146:226:b9ff:fefa:de48/64 Scope:Global

          inet6 addr: fe80::226:b9ff:fefa:de48/64 Scope:Link

          inet6 addr: 2001:da8:201:1146:c52c:1d:240a:97ed/64 Scope:Global

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:58924 errors:0 dropped:0 overruns:0 frame:0

          TX packets:18735 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0 

          RX bytes:4754344 (4.7 MB)  TX bytes:9676157 (9.6 MB)

eth0      Link encap:Ethernet  HWaddr 00:26:b9:fa:de:48  

          inet6 addr: fe80::226:b9ff:fefa:de48/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:228497 errors:0 dropped:110 overruns:0 frame:0

          TX packets:62679 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 

          RX bytes:164064870 (164.0 MB)  TX bytes:13773337 (13.7 MB)

lo        Link encap:Local Loopback  

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

          UP LOOPBACK RUNNING  MTU:16436  Metric:1

          RX packets:20779 errors:0 dropped:0 overruns:0 frame:0

          TX packets:20779 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0 

          RX bytes:8895827 (8.8 MB)  TX bytes:8895827 (8.8 MB)

tap0      Link encap:Ethernet  HWaddr 16:ac:8f:69:84:7a  

          inet6 addr: fe80::14ac:8fff:fe69:847a/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:147 errors:0 dropped:0 overruns:0 frame:0

          TX packets:5283 errors:0 dropped:455 overruns:0 carrier:0

          collisions:0 txqueuelen:500 

          RX bytes:17251 (17.2 KB)  TX bytes:418040 (418.0 KB)

I write a script to start VM, the script is here(kvm.bridge):

#! /bin/bash

USERID=`whoami`

MACADDR="00:26:b9:fa:ff:31"

model=e1000e

iface=`sudo tunctl -b -u $USERID`

qemu-system-x86_64 -net nic,vlan=0,macaddr=$MACADDR -net tap,vlan=0,ifname=$iface $@

sudo tunctl -d $iface

So I start VM with:

address@hidden:~# ./kvm.bridge -vnc :1 -hda vm1.img -m 1024

TUNSETIFF: Device or resource busy

qemu-system-x86_64: pci_add_option_rom: failed to find romfile "efi-e1000.rom"

When I connect to the VM with command:

address@hidden ~]# ssh 10.0.0.131

ssh_exchange_identification: Connection closed by remote host

It can success when I try about 4 times to connect. Is there anything wrong when I configure the network?

Thanks,

Arthur

--
Arthur Chunqi Li
Department of Computer Science
School of EECS
Peking University
Beijing, China