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Re: [Xen-devel] Compiling from source and networking problem


  • To: Matthew Donovan <matthew@xxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Fri, 13 Jun 2008 20:32:07 +0100
  • Delivery-date: Fri, 13 Jun 2008 12:31:41 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcjNjCpeaPeg0jl/Ed2ZSAAWy6hiGQ==
  • Thread-topic: [Xen-devel] Compiling from source and networking problem

Networking for Windows guests should work straightforwardly 'out of the
box'. Have you been able to get networking going with any other type of
guest: e.g., Linux, WinXP?

 -- Keir

On 13/6/08 18:50, "Matthew Donovan" <matthew@xxxxxxxxxxxxxx> wrote:

> Hey,
> 
> I was originally asking questions on xen-users but no one seems to have any
> idea about this so I figured I'd try this list.
> 
> I compiled Xen from source (3.2 testing) on an Intel machine running Fedora
> Core 8 and have discovered that my guest (Windows Vista) does not have a
> network connection.
> 
> Looking at various online documentation and a machine that does work, I
> guessed that I needed dnsmasq and libvirtd installed.  I did that (and I
> think it's configured correctly i.e. it runs when the machine boots and has
> the same flags as the machine that works) and still nothing (i.e. domU does
> not have a network connection).  I installed libvirt from source and got the
> Fedora package for dnsmasq.
> 
> Most of the documentation I've found for networking is old and doesn't seem
> to reflect what Xen is doing.  Most sources refer to xenbr0 while only a
> couple places mention that eth0 becomes the bridge and peth0 is now the
> interface that dom0 uses.
> 
> It's possible that I have remnants of my attempt to get Xen working from
> rpm's on this system.  I don't know if that would screw anything up or not.
> 
> Is there an up-to-date reference for how Xen networking is done?  I've read
> the XenNetworking Wiki page through repeatedly and can't glean the
> appropriate trouble-shooting information from it.
> 
> In the VM I've tried configuring it for DHCP and giving it a static IP.
> Neither do anything.
> 
> Should I just format the computer and start from scratch?
> 
> I'm at my wit's end here.
> Any help is appreciated.
> -matthew
> 
> Some other details:
> My _current_ guest config specifies networking as:
> 
> dhcp="dhcp"
> vif=[ 'type=ioemu, bridge=xenbr0' ]
> 
> 
> /etc/xen/xend-config.sxp says:
> (network-script network-bridge)
> (vif-script vif-bridge)
> 
> My guest is currently running and "brctl show" output:
> [root@moosen ~]# brctl show
> bridge name     bridge id               STP enabled     interfaces
> eth0            8000.0019b932c635       no              peth0
>                                                         tap0
>                                                         vif2.0
> virbr0          8000.000000000000       yes
> 
> 
> Iptables output:
> 
> [root@moosen ~]# iptables -L
> Chain INPUT (policy ACCEPT)
> target     prot opt source               destination
> ACCEPT     udp  --  anywhere             anywhere            udp dpt:domain
> ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:domain
> ACCEPT     udp  --  anywhere             anywhere            udp dpt:bootps
> ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:bootps
> ACCEPT     udp  --  anywhere             anywhere            udp dpt:domain
> ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:domain
> ACCEPT     udp  --  anywhere             anywhere            udp dpt:bootps
> ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:bootps
> ACCEPT     udp  --  anywhere             anywhere            udp dpt:domain
> ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:domain
> ACCEPT     udp  --  anywhere             anywhere            udp dpt:bootps
> ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:bootps
> RH-Firewall-1-INPUT  all  --  anywhere             anywhere
> 
> Chain FORWARD (policy ACCEPT)
> target     prot opt source               destination
> ACCEPT     all  --  anywhere             192.168.122.0/24    state
> RELATED,ESTABLISHED
> ACCEPT     all  --  192.168.122.0/24     anywhere
> ACCEPT     all  --  anywhere             anywhere
> REJECT     all  --  anywhere             anywhere            reject-with
> icmp-port-unreachable
> REJECT     all  --  anywhere             anywhere            reject-with
> icmp-port-unreachable
> ACCEPT     all  --  anywhere             192.168.122.0/24    state
> RELATED,ESTABLISHED
> ACCEPT     all  --  192.168.122.0/24     anywhere
> ACCEPT     all  --  anywhere             anywhere
> REJECT     all  --  anywhere             anywhere            reject-with
> icmp-port-unreachable
> REJECT     all  --  anywhere             anywhere            reject-with
> icmp-port-unreachable
> ACCEPT     all  --  anywhere             192.168.122.0/24    state
> RELATED,ESTABLISHED
> ACCEPT     all  --  192.168.122.0/24     anywhere
> ACCEPT     all  --  anywhere             anywhere
> REJECT     all  --  anywhere             anywhere            reject-with
> icmp-port-unreachable
> REJECT     all  --  anywhere             anywhere            reject-with
> icmp-port-unreachable
> REJECT     all  --  anywhere             anywhere            reject-with
> icmp-host-prohibited
> ACCEPT     all  --  anywhere             anywhere            PHYSDEV match
> --physdev-in vif2.0
> 
> Chain OUTPUT (policy ACCEPT)
> target     prot opt source               destination
> 
> Chain RH-Firewall-1-INPUT (1 references)
> target     prot opt source               destination
> ACCEPT     all  --  anywhere             anywhere
> ACCEPT     icmp --  anywhere             anywhere            icmp any
> ACCEPT     esp  --  anywhere             anywhere
> ACCEPT     ah   --  anywhere             anywhere
> ACCEPT     udp  --  anywhere             224.0.0.251         udp dpt:mdns
> ACCEPT     udp  --  anywhere             anywhere            udp dpt:ipp
> ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ipp
> ACCEPT     all  --  anywhere             anywhere            state
> RELATED,ESTABLISHED
> ACCEPT     tcp  --  anywhere             anywhere            state NEW tcp
> dpt:ssh
> REJECT     all  --  anywhere             anywhere            reject-with
> icmp-host-prohibited
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel



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