<div dir="ltr">OK, understood. I never added br0 myself, but who knows if it's added by some process.. I'll have a look tonight and see what's in there. I'll backup the config and play with different scenarios.<br><div><br></div><div>I had a thought in the middle of the night last night, which I haven't had a chance to confirm yet.. I have 2 NICs on this box, call them eth0 and eth1, naturally. I can't connect to eth0 since the upgrades and reboot. But I can talk to the guest virtual machines, which I believe use eth2 (I have to check for sure). Could it be that eth0 is physically pooched, or that something in the upgrades (or reboots) turned eth0 off? The last time I did ifconfig it looked to me like both NICs were still configured correctly.</div><div><br></div><div><br></div></div><br><div class="gmail_quote">On Fri, 13 Mar 2015 at 08:21 Khalid Baheyeldin <<a href="mailto:kb@2bits.com">kb@2bits.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Not sure if I was clear the first time or not.<br><br></div>Adding br0 is what caused my physical server to hang on reboot, though it worked fine until that.<br><br>This is NOT a solution to anything.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Mar 13, 2015 at 8:19 AM, CrankyOldBugger <span dir="ltr"><<a href="mailto:crankyoldbugger@gmail.com" target="_blank">crankyoldbugger@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Ok, that was my mistake. I'll do the auto br0 tonight. Thanks for the idea.<br><br></div><div><div><br><div class="gmail_quote">On Fri, 13 Mar 2015 at 05:47 Khalid Baheyeldin <<a href="mailto:kb@2bits.com" target="_blank">kb@2bits.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Mar 12, 2015 at 11:14 PM, CrankyOldBugger <span dir="ltr"><<a href="mailto:crankyoldbugger@gmail.com" target="_blank">crankyoldbugger@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">That didn't seem to help. I commented out all of the lines below virbr0. Now I can't reach the VMs either.<br><br><div>By bridging, I assumed you mean virbr0, which we all worked so hard to set up a few weeks ago. </div></div></blockquote><div><br></div></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>No. It was not virbr0.<br><br></div><div>It was:<br><br></div><div>auto br0<br></div><div>iface br0 inet dhcp<br></div><div> bridge_ports eth0<br><br></div><div>Again, I am using libvirt with kvm underneath, not any other virtualization stack.<br><br></div></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>I don't understand why I've been merrily rebooting since then but all of a sudden it starts to fail. Just weird.</div></div></blockquote><div><br></div></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>In that case, it is a totally different problem. Mine never booted successfully. In your case, it seems intermittent.<br> <br></div></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><br></div><div>I'll fiddle with it some more tomorrow.</div><div><br></div></div><div><div><br><div class="gmail_quote">On Thu, 12 Mar 2015 at 19:05 Khalid Baheyeldin <<a href="mailto:kb@2bits.com" target="_blank">kb@2bits.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>That happened to me when I had bridging on the physical host that has virtualization. Things work, until you reboot, then server is not reachable.<br><br></div>I didn't figure out why, and ended up abandoning the bridge I added to /etc/network/interfaces, and using the default networking that is setup by libvirt.<br></div><div class="gmail_extra"><br><div class="gmail_quote"></div></div><div class="gmail_extra"><div class="gmail_quote">On Thu, Mar 12, 2015 at 6:51 PM, CrankyOldBugger <span dir="ltr"><<a href="mailto:crankyoldbugger@gmail.com" target="_blank">crankyoldbugger@gmail.com</a>></span> wrote:<br></div></div><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I'm puzzled... I rebooted my Ubuntu server this morning (as updates needed a reboot) and now I can't reach it.<div><br></div><div>Here's what I determined:</div><div><br></div><div>It was running fine before the reboot!</div><div>I can't ping the server from another machine on the same subnet.</div><div>I can't SSH to the server.</div><div>SSH is running on the server.</div><div>I can't telnet to the server</div><div>I can ssh from the server to itself, so ssh is running and listening on 22.</div><div>If I try to ssh from another linux box on the same subnet, using either hostname or IP, I get "No route to host".</div><div>Traceroute should only one hop, that being the client I started traceroute from, but that line ends in !H, which I believe means can't connect.</div><div>IP address is fine.</div><div>I can't ping out from the server.</div><div>Now here's the fun part: I have two virtual machines hosted on this server, and they're both running fine. I can connect to them and they can connect to the internet.</div><div><br></div><div>Not sure what to think at this point. Anyone have any ideas?</div><div><br></div></div>
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