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Re: [Xen-users] Xen 3.0 on FC4 - guest domains cant ping host domain

from [David F. Barrera] [Permanent Link][Original]
To: Ubaidul Khan <ukhanlists@xxxxxxxxxxx>
Subject: Re: [Xen-users] Xen 3.0 on FC4 - guest domains cant ping host domain
From: "David F. Barrera" <dfbp@xxxxxxxxxx>
Date: Thu, 27 Apr 2006 13:41:17 -0500
Cc: xen-users@xxxxxxxxxxxxxxxxxxx, mito@xxxxxxxxxxxxx
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User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20050921 Red Hat/1.7.12-1.4.1 
See if you have a firewall turned on.

--
Regards,

David F Barrera
Linux Technology Center
Systems and Technology Group, IBM

"The wisest men follow their own direction. "
                                                      Euripides




Ubaidul Khan wrote:
I am using the default (Bridged) network model. Following is network configuraitons from my xend-config.sxp file:
<--------------------------------------/etc/xen/xend-config.sxp --------------------------------------> 
    ## Use the following if VIF traffic is routed.
    # The script used to start/stop networking for xend.
    #(network-script     network-route)
    # The default script used to control virtual interfaces.
    #(vif-script         vif-route)

    ## Use the following if VIF traffic is bridged.
    # The script used to start/stop networking for xend.
    (network-script    network-bridge)

    # The default bridge that virtual interfaces should be connected to.
    (vif-bridge        xen-br0)

    # The default script used to control virtual interfaces.
    (vif-script        vif-bridge)

    # Whether iptables should be set up to prevent IP spoofing for
    # virtual interfaces. Specify 'yes' or 'no'.
    (vif-antispoof     no)
<----------------------------------------------------------------------------------------------------->
I found an artcle online and tried following it and created a bridge, but that didn't remedy either:
[ http://www.linuxdevcenter.com/pub/a/linux/2006/01/26/xen.html?page=2 ]
<--------------------------------------Bridge Creation--------------------------------------> 
    [root@seleya ~]# brctl show
    bridge name     bridge id               STP enabled     interfaces
xen-br0 8000.feffffffffff no peth0 vif0.0 
    [root@seleya ~]# brctl addbr xen-br1
    [root@seleya ~]# brctl addif xen-br1 vif1.0
    [root@seleya ~]# brctl addif xen-br1 eth0
<------------------------------------End of Bridge Creation------------------------------------>
The machine loses all network connectivity after adding eth0 to the bridge xen-br1. 


From: "Mito" <mito@xxxxxxxxxxxxx>
To: "'Ubaidul Khan'" <ukhanlists@xxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx> Subject: RE: [Xen-users] Xen 3.0 on FC4 - guest domains cant ping host domain 
Date: Wed, 26 Apr 2006 16:37:57 -0400

This sounds identical to my problem when I try to use the NAT networking
model. What network model are you trying to use? Bridge (the default, NAT, 
or Route?
I just recently installed Xen3 on a FC5 host and a FC4 guest, and it worked 
perfectly until I changed it to the NAT model.
As far as why yours isn't working, we would have to see your xen config file 
for the domU.


-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ubaidul Khan
Sent: Wednesday, April 26, 2006 3:20 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Xen 3.0 on FC4 - guest domains cant ping host domain
I am installed Xen 3.0 on a Fedora Core 4(2.6.12-1.1454_FC4xen0) machine. 
This machine is currently running one host domain:

[root@]# xm list
Name              Id  Mem(MB)  CPU VCPU(s)  State  Time(s)
Domain-0           0      128    0      1   r----     49.1
fc4-vm1            1       63    0      1   -b---     18.5


Following is the network configuration for Domain-0:

eth0      Link encap:Ethernet  HWaddr 00:E0:29:5F:D1:E9
inet addr:192.168.1.110 Bcast:192.168.1.255 Mask:255.255.255.0 
          inet6 addr: fe80::2e0:29ff:fe5f:d1e9/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:533 errors:0 dropped:0 overruns:0 frame:0
          TX packets:282 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:54841 (53.5 KiB)  TX bytes:37292 (36.4 KiB)

eth0:0    Link encap:Ethernet  HWaddr 00:E0:29:5F:D1:E9
          inet addr:xxx.xxx.xxx.xxx.xxx  Bcast:xxx.xxx.1.xxx
Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

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:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:560 (560.0 b)  TX bytes:560 (560.0 b)

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:584 errors:0 dropped:0 overruns:0 frame:0
          TX packets:338 errors:0 dropped:0 overruns:0 carrier:0
          collisions:2 txqueuelen:1000
          RX bytes:59953 (58.5 KiB)  TX bytes:44108 (43.0 KiB)
          Interrupt:10 Base address:0x1000

sit0      Link encap:IPv6-in-IPv4
          NOARP  MTU:1480  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)

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:316 errors:0 dropped:0 overruns:0 frame:0
          TX packets:552 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:42992 (41.9 KiB)  TX bytes:56123 (54.8 KiB)

xen-br0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:190 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:15048 (14.6 KiB)  TX bytes:378 (378.0 b)

Following is configuration for the guest domain(fc4-vm1):

[root@fc4-vm1 ~]# ifconfig -a
eth0      Link encap:Ethernet  HWaddr AA:00:00:15:94:CA
inet addr:192.168.1.121 Bcast:192.168.1.255 Mask:255.255.255.0 
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:210 (210.0 b)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:560 (560.0 b)  TX bytes:560 (560.0 b)
When I try to ping the Domain-0(192.168.1.110) from fc4-vm1(192.168.1.121), 
I get :

PING 192.168.1.110 (192.168.1.110) 56(84) bytes of data
I tried messing around with the routing table without any success. Any help 

is appreciated.

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