Rudi Ahlers
2008-Jul-06 10:17 UTC
[Xen-users] can''t ping / connect to aliased IP from internet
Hi all I have a very strange problem. One of our servers run CentOS 5.1 x64, with the default Xen from CentOS repositories, and then I''m running Windows 2003 & CentOS 5.1 XEN domU guests on it. Both the Windows & Linux domU''s have 2 IP''s to connect to from the internet. But on the Linux domU I can only connect to one of it''s IP''s, the other one refuse to accept connections from the internet. From the dom0 I can connect to both IP''s, and when I setup a new domU VPS, I can connect to the IP in question as well. I can add a 3rd IP to the Linux domU, and connect to that as well. So, the XEN server is on x.x.x.47, with the Linux domU on x.x.x.48 & x.x.x.49 - I can connect fine to x.x.x.48, but not x.x.x.49. If I add x.x.x.52 to the domU, I can connect to x.x.x.52 as well. I have also gone as far as setting up a new Linux domU using x.x.x.49, and then it works fine, but I need both .48 & .49 on the same Linux domU (and software). There''s no firewall setup at all. So, how / where do I debug this? -- Kind Regards Rudi Ahlers CEO, SoftDux Web: http://www.SoftDux.com Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Andy Burns
2008-Jul-06 10:24 UTC
Re: [Xen-users] can''t ping / connect to aliased IP from internet
On 06/07/2008 11:17, Rudi Ahlers wrote:> So, the XEN server is on x.x.x.47, with the Linux domU on x.x.x.48 & > x.x.x.49 - I can connect fine to x.x.x.48, but not x.x.x.49. If I add > x.x.x.52 to the domU, I can connect to x.x.x.52 as well. > > So, how / where do I debug this?check you haven''t got duplicate MAC addresses on any domU NICs check the MAC addresses are visible on the xen bridges _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Rudi Ahlers
2008-Jul-06 10:36 UTC
Re: [Xen-users] can''t ping / connect to aliased IP from internet
Andy Burns wrote:> On 06/07/2008 11:17, Rudi Ahlers wrote: > >> So, the XEN server is on x.x.x.47, with the Linux domU on x.x.x.48 & >> x.x.x.49 - I can connect fine to x.x.x.48, but not x.x.x.49. If I add >> x.x.x.52 to the domU, I can connect to x.x.x.52 as well. >> >> So, how / where do I debug this? > > check you haven''t got duplicate MAC addresses on any domU NICs > > check the MAC addresses are visible on the xen bridges > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >aha, I had a duplicate MAC address. If I create domU''s manually, how to make sure the MAC addresses are unique & still valid? And does the UUID in the /etc/xen/linux01 domU have to be unique as well? -- Kind Regards Rudi Ahlers CEO, SoftDux Web: http://www.SoftDux.com Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Andy Burns
2008-Jul-06 10:40 UTC
Re: [Xen-users] can''t ping / connect to aliased IP from internet
On 06/07/2008 11:36, Rudi Ahlers wrote:> aha, I had a duplicate MAC address. > > If I create domU''s manually, how to make sure the MAC addresses are > unique & still valid?how are you creating your domUs? virt-manager "hiding" the details for you libvirt XML files or xmdomain.cfg format text files? _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Rudi Ahlers
2008-Jul-06 11:31 UTC
Re: [Xen-users] can''t ping / connect to aliased IP from internet
Andy Burns wrote:> On 06/07/2008 11:36, Rudi Ahlers wrote: > >> aha, I had a duplicate MAC address. >> >> If I create domU''s manually, how to make sure the MAC addresses are >> unique & still valid? > > how are you creating your domUs? > > virt-manager "hiding" the details for you > libvirt XML files > or xmdomain.cfg format text files? > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >I used to use virt-install, but that doesn''t work well for Windows based VM''s, so now I do it manually - just copy an existing config file to a new one, rename it + change paths + change LVM stuff, etc -- Kind Regards Rudi Ahlers CEO, SoftDux Web: http://www.SoftDux.com Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users