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From Edison Su <Edison...@citrix.com>
Subject RE: DevCloud host-only interface
Date Tue, 17 Jul 2012 21:11:58 GMT


> -----Original Message-----
> From: sebastien goasguen [mailto:runseb@gmail.com]
> Sent: Tuesday, July 17, 2012 1:26 PM
> To: cloudstack-users@incubator.apache.org
> Subject: Re: DevCloud host-only interface
> 
> On Tue, Jul 17, 2012 at 4:23 PM, Edison Su <Edison.su@citrix.com> wrote:
> >
> >
> >> -----Original Message-----
> >> From: sebastien goasguen [mailto:runseb@gmail.com]
> >> Sent: Tuesday, July 17, 2012 12:34 PM
> >> To: cloudstack-users@incubator.apache.org
> >> Subject: Re: DevCloud host-only interface
> >>
> >> On Tue, Jul 17, 2012 at 1:57 PM, Edison Su <Edison.su@citrix.com>
> wrote:
> >> >
> >> >
> >> >> -----Original Message-----
> >> >> From: sebastien goasguen [mailto:runseb@gmail.com]
> >> >> Sent: Tuesday, July 17, 2012 5:41 AM
> >> >> To: cloudstack-users@incubator.apache.org
> >> >> Subject: DevCloud host-only interface
> >> >>
> >> >> Hi,
> >> >>
> >> >> I am trying to add a host-only interface to the DevCloud VM, so
> that
> >> I
> >> >> can have other VMs (not nested ones) on the same internal network.
> >> >> I have a centOS 6.2 VM setup with host-only and it works as
> expected.
> >> >>
> >> >> Somehow the eth1 that I added to DevCloud in
> /etc/network/interfaces
> >> >> receives all the arp packets but does not reply to any.
> >> >> To define the interface I added:
> >> >> auth eth1
> >> >> iface eth1 inet dhcp
> >> >>
> >> >> eth1 comes up and gets an IP from the dhcp server of vbox. The IP
> >> >> actually responds briefly to ping during boot time but then it
> stops
> >> >> answering.
> >> >>
> >> >> If I ping the IP from the host, I can see the arp request on the
> >> guest
> >> >> interface, there are just no replies going out.
> >> >
> >> > What's the routing table in Ubuntu guest?
> >> >
> >>
> >> root@devcloud:~# route
> >> Kernel IP routing table
> >> Destination     Gateway         Genmask         Flags Metric Ref
> Use
> >> Iface
> >> default         10.0.2.2        0.0.0.0         UG    100    0
> 0
> >> xenbr0
> >> 10.0.2.0        *               255.255.255.0   U     0      0
> 0
> >> xenbr0
> >> 10.0.2.0        *               255.255.255.0   U     0      0
> 0
> >> eth0
> >> link-local      *               255.255.0.0     U     0      0
> 0
> >> xapi0
> >> 192.168.56.0    *               255.255.255.0   U     0      0
> 0
> >> eth1

The default gateway is on 10.0.2.2, which is the NAT gateway.
Could you change the default gateway, to your host-only network gateway?

> >>
> >> root@devcloud:~# ifconfig eth1
> >> eth1      Link encap:Ethernet  HWaddr 08:00:27:df:00:00
> >>           inet addr:192.168.56.110  Bcast:192.168.56.255
> >> Mask:255.255.255.0
> >>           inet6 addr: fe80::a00:27ff:fedf:0/64 Scope:Link
> >>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >>           RX packets:32 errors:0 dropped:0 overruns:0 frame:0
> >>           TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
> >>           collisions:0 txqueuelen:1000
> >>           RX bytes:5408 (5.4 KB)  TX bytes:2172 (2.1 KB)
> >>
> >> I changed the vbox dhcp server to lease addresses at 192.68.56.110
> >
> > So you have two nics in devCloud, one in NAT mode, one in Host mode?
> > How about just using one nic, change the NAT mode to host mode?
> >>
> 
> Yes I have two nics.
> I did not want to change your NATed nic to avoid messing up your setup.
> 
> 
> --
> ---
> Sebastien Goasguen
> Open Source Cloud Evangelist, Cloudstack
> http://sites.google.com/site/runseb/

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