[Xen-users] Re: linux hvm network problem

["Marco Strullato" <marco.strullato@xxxxxxxxx>]

I've noticed this into log files:

Dec  6 17:23:05 HYP02 kernel: device tap0 entered promiscuous mode
Dec  6 17:23:05 HYP02 kernel: audit(1196958185.809:38): dev=tap0 prom=256 old_prom=0 auid=4294967295
Dec  6 17:23:05 HYP02 kernel: xenbr0: port 3(tap0) entering learning state
Dec  6 17:23:05 HYP02 kernel: xenbr0: topology change detected, propagating
Dec  6 17:23:05 HYP02 kernel: xenbr0: port 3(tap0) entering forwarding state
Dec  6 17:23:06 HYP02 kernel: device vif18.0 entered promiscuous mode
Dec  6 17:23:06 HYP02 kernel: audit(1196958186.493:39): dev=vif18.0 prom=256 old_prom=0 auid=4294967295
Dec  6 17:23:06 HYP02 kernel: ADDRCONF(NETDEV_UP): vif18.0: link is not read

About DomU, network packets does'n pass through 
vif18.0 but only though tap0 and xenbr0...

into the qemu log, I have 

domid: 18
qemu: the number of cpus is 2
shared page at pfn:5ffff, mfn: 24fca
buffered io page at pfn:5fffd, mfn: 24fcc
char device redirected to /dev/pts/1
False I/O request ... in-service already: 0, pvalid: 0, port: 0, data: 0, count: 0, size: 0
False I/O request ... in-service already: 0, pvalid: 0, port: 0, data: 0, count: 0, size: 0

Thanks,

Marco

2007/12/6, Marco Strullato <marco.strullato@xxxxxxxxx>:

Hi all,
I'm having network problems with hvm.
My conf is centos5 with xen 3.0.3. I'm booting a RedHat 9 with this conf file

kernel = "/usr/lib/xen/boot/hvmloader"
builder='hvm'
memory = 1536
shadow_memory = 8
name = "SERVER"
vcpus=2
pae=0
acpi=0
apic=0
disk = [ 'phy:/dev/HYP02VM/LUMINA,ioemu:hda,w',  ]
device_model = '/usr/lib/xen/bin/qemu-dm'
sdl=1
vnc=1
vnclisten="0.0.0.0"
vncdisplay=1
vncunused=1
vncconsole=1
vncpasswd='abc123'
nographic=0
stdvga=0
serial='pty'
vif = [ 'type=ioemu, bridge=xenbr0, model=ne2k_pci']

After the 1st boot, the guest recognize the new configuration and reconfigure the network correctly with kudzu: the guest can reach the dhcp server and get a valid ip address. After the first connection to the dhcp server the guest became "isolated". I mean I can not connet to the default gateway. I tried to assign manually the ip address but nothing changes.

I took a tcpdump on the dom0 listenting to the bridge and to the hvm domU. I have the same result:  only arp requests


10.0.1.29 is the ip address of the hvm guest... the other is the mine ip.


15:53:30.472523 arp who-has 10.0.0.34 tell 10.0.1.29
15:53:31.492565 arp who-has 10.0.0.34 tell 10.0.1.29
15:53:32.492586 arp who-has 10.0.0.34 tell 10.0.1.29
15:53:33.492619 arp who-has 10.0.0.34 tell 10.0.1.29
15:53:34.492697 arp who-has 10.0.0.34 tell 10.0.1.29
15:53:35.492687 arp who-has 10.0.0.34 tell 10.0.1.29
15:53:36.492717 arp who-has 10.0.0.34 tell 10.0.1.29
15:53:37.492786 arp who-has 10.0.0.34 tell 10.0.1.29
15:53:38.492787 arp who-has 10.0.0.34 tell 10.0.1.29


Do you have some suggestions? Dom0's network is running  well, I have other linux paravirtualized vm running...


Regards,

Marco

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