Re: [ovirt-users] Networking issues with oVirt Guest VM.

Clint, Sorry, I missed that you already tried that. Here are my thoughts (some more shooting in the dark) after reading your description again: - You have quite complicate setup. IIUC, ovirt-engine and its host are vSphere VMs. Then, a kind of no-macspoof should be applied from the vSphere side. BTW, are both of them on the same vShepre host? Is DHCP server another VM on that host? - Where/how did you "turn on Port Mirroring"? - I'd start the troubleshooting by using tcpdump utility in order to pinpoint the component that blocks the traffic. - Did you try assigning a static IP instead of DHCP and then check connectivity? If that works, then the problem is on the DHCP sever side probably. - If you do not see any requests in the DHCP server log, then I guess, "dhclient -B" wouldn't help. - Please turn iptables/firewalld off. Regards, Yevgeny On Sun, Jul 3, 2016 at 9:06 PM, Yevgeny Zaspitsky <yzaspits(a)redhat.com&gt; wrote: > Hello, > > IIUC using vdsm macspoof hook would help - reading [1] should help you > configuring that. > > [1] https://github.com/oVirt/vdsm/blob/master/vdsm_hooks/macspoof/README > > Hope that helps, > Yevgeny > > On Thu, Jun 30, 2016 at 6:11 AM, Clint Smith <clint.smith.maui(a)gmail.com&gt; > wrote: > >> Hello, >> >> I have been experimenting with oVirt for the last couple of weeks and I >> must say it has a lot of nice features. I really like it, however, I am >> having a heck of a time getting the guest networking all set up correctly. >> I am hoping that someone can give me a little guidance in figuring this >> out. I apologize in advance if some of my terminology is off, I am new. >> >> Here is a brief intro to my setup: >> I created a Centos 7 VM within a vSphere/ESXI environment and then >> installed ovirt-engine on it. I also created another Centos 7 VM and set >> it up as a host. I have configured the Cluster and Host via the oVirt >> Administration Portal. For simplicity, I am using the default ovirtmgmt >> network as my only logical network, however I have tried several different >> schemes with no luck. I have a DHCP server and a DNS server that are >> siblings to the oVirt host and the engine. Both the engine and the host >> have been upgraded to version 4.0. >> >> The problem: >> My thought was that I would have the guest VMs on the oVirt host use my >> existing DHCP server to get their IP addresses, at least at first. The >> problem I am having is that the DHCPACK is not making it back across the >> ovirtmgmt bridge and on to the guest. If I tell dhclient(from the guest) >> to force a Broadcast (by using the –B option) on the DHCP server, it will >> work. This is not a solution, just a clue. Another clue is that ARP >> replies from the gateway don’t make it back to the machine, preventing >> pings even when I force the IP. Lastly, If I turn on Port Mirroring, >> everything works fine, but it’s my understanding that this is only for >> debugging purposes. >> >> What I have tried (in no particular order): >> >> - Reading the docs >> - Turning on VLAN tagging. >> - Installing the mac-spoofing hook, making the configuration changes >> to the engine, and then turning it on in the VM config. I also verified >> that the ‘filterref’ tag was removed using virsh. >> - Setting up a second logical network on a different subnet, and >> connecting it to an additional network interface that I added to the host. >> On the host, I setup dnsmasq as a DNS and DHCP server. I got this working >> up to the point of having the same issues that I was having using the >> existing DHCP and DNS servers on the ovirtmgmt network. >> - I have tried various changes to iptables as well as the original >> settings as well as verified that ebtables is not blocking any traffic. I >> did configure iptables for logging and noticed it was dropping some traffic >> related to DHCP, however it seemed like it was DISCOVER or REQUEST traffic >> due to the IN, OUT, SRC, and DST variables in the log. I have viewed the >> DHCP server logs multiple times and I can see that it is receiving the >> DISCOVER and the REQUEST from my guests MAC and sending the OFFER and ACK >> consistently. >> - Setting SELinux to Permissive >> - Setting ip_forward to 1 >> - Turning STP ON on the bridge >> - Changing the bridge delay >> - Setting up a dhcrelay using dnsmasq (not sure I implemented this >> right though) >> >> I am really shooting in the dark when it comes to networking because I >> am learning a lot of this on the fly. I feel like I must have a >> misconception about how networking should work with oVirt. Is my entire >> approach naïve? Any help/guidance that someone could offer would be much >> appreciated. >> >> Thanks, >> Clint >> >> >> >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >> >> >