[Xen-users] arp who-has not answered

[Carles Pina i Estany <carles@xxxxxxxx>]

Hello,

Fast question: from DomU I cannot ping Dom0, I only get 
19:17:33.573370 arp who-has 192.168.10.1 tell 192.168.10.150
19:17:34.573421 arp who-has 192.168.10.1 tell 192.168.10.150

using tcpdump in Dom0. Why?

---------------
Detailed question:

I'm setting up a Xen virtual server. The environment is:
-HVM
-AMD64
-Debian Etch and using Xen from Debian repository (so Xen 3.0.3, quite
old but enough for my basic things)
-Network has route way

I have been here asking some things and it's "mainly" working :-)
(thanks Max) Let me only to re-write the current situation. I did some
tests but I will not describe all of them (I could write a book about
"how to NOT setup a Xen" :-D)

/etc/xen/xend-config.sxp
------------
(logfile /var/log/xen/xend.log)
(loglevel DEBUG)
(network-script network-route)
(vif-script     vif-route2)
-------------
vif-route2 is the sam than vif-route changin $main_ip by $ip in ifconfig
and "cmdprefix ip route" lines

The machine.cfg file is:
------------
kernel='/usr/lib64/xen-3.0.3-1/boot/hvmloader'
builder='hvm'
device_model='/usr/lib64/xen-3.0.3-1/bin/qemu-dm'
memory=256
name='chronojump'
vif = [ 'ip=192.168.10.0, type=ioemu, mac=22:16:3e:00:00:11' ]
disk=['file:/home/xen/domains/chronojump/root,hda,w','file:/home/xen/domains/debian-etch.iso,hdc:cdrom,r']
boot='c'
vnc=1
vncviewer=1
sdl=0
vncpasswd=''
stdvga=0
pae=1
------------

My Dom0 eth0 IP is 192.168.0.1
My DomU eth0 IP is 192.168.10.150

After create the virtual machine, the network status in Dom0 is:
vif49.0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          inet addr:192.168.10.0  Bcast:192.168.10.255  Mask:255.255.255.255
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

(is it correct or I should set up a real IP address? I'm very confused here)

tap0: I setup the 192.168.10.1 address (ifconfig tap0 192.168.10.1):

>From DomU, if I ping 192.168.10.1 ping says "Destination Host Unreacahble",
and I can sniff in Dom0:

servidor:~# tcpdump -i tap0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tap0, link-type EN10MB (Ethernet), capture size 96 bytes
19:17:33.573370 arp who-has 192.168.10.1 tell 192.168.10.150
19:17:34.573421 arp who-has 192.168.10.1 tell 192.168.10.150
19:17:35.573471 arp who-has 192.168.10.1 tell 192.168.10.150

Nothing in vif49.0 interface.

I have a xenbr0 (else xm create fails), right now I have:
---------
servidor:~# brctl show
bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.fae2d7fe3bd5       no              tap0
servidor:~# 
---------

Yesterday I added eth0 in xenbr0 bridge (or vif49.0) but nothing happened.

Parts of ip route:
192.168.10.0 dev vif49.0  scope link  src 192.168.10.0 
192.168.10.0/24 dev tap0  proto kernel  scope link  src 192.168.10.1 
192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.1 

Ok, I don't like that two interfaces (vif49.0 and tap0) has the same network! 
But which is the correct way? I'm not sure (and my tests has not gone very well)

Another things: iptables is not a problem for sure, and I also did:
echo 1 >/proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp
echo 1 > /proc/sys/net/ipv4/conf/tan0/proxy_arp

Thank you very much!

-- 
Carles Pina i Estany            GPG id: 0x8CBDAE64
        http://pinux.info       Manresa - Barcelona

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users