You can check by logging in to the VR and the contents of /var/lib/misc/dnsmasq.leases Dnsmasq is programmed to only answer requests that it knows the mac address of. In CS, all mac addresses start with 06: (which is a 'private' OUI)
On 3/12/13 7:08 PM, "Wei Leong" <wle...@blackducksoftware.com> wrote: >Thanks for your response. I'd have to investigate further about the >dropped packets. Back to the first case, today was the third time in a >week that my sys admin has told me that he thinks the virtual router >(with DHCP enabled) is leasing IPs to machines outside the cloud on the >network. Has this been a problem for anyone else? > > >On Mar 12, 2013, at 8:13 PM, Chiradeep Vittal ><chiradeep.vit...@citrix.com> wrote: > >> In the first go-around, not sure what do you mean DNS didn't work. I >> assume you could ping www.google.com ? The cloudstack DHCP systemvm will >> forward DNS requests that it cannot resolve with its own /etc/hosts to >>the >> 'zone' DNS server. >> >> In the second go-around it is probably expected behavior, but I cannot >>say >> for sure. CloudStack implements anti-spoofing at the hypervisor level, >>so >> if the packet coming out of the VM does not have a source ip/mac it >> doesn't know about, it instructs the hypervisor to drop it. In this case >> since the ip was assigned by a DHCP server not controlled by CloudStack >> this will most likely result in a dropped packet. >> You could try logging into the hypervisor and execute >> ebtables -F >> >> >> On 3/12/13 4:48 AM, "Wei Leong" <wle...@blackducksoftware.com> wrote: >> >>> Nope, basic networking the second time too. >>> >>> On Mar 12, 2013, at 1:25 AM, "Chiradeep Vittal" >>> <chiradeep.vit...@citrix.com> wrote: >>> >>>> Is the second go-around using advanced networking? >>>> >>>> On 3/10/13 1:54 PM, "Wei Leong" <wle...@blackducksoftware.com> wrote: >>>> >>>>> It seems I am having a lot of trouble setting up even the simplest of >>>>> cloudstack networking configurations. >>>>> >>>>> A quick background on my setup: >>>>> >>>>> The kvm host is part of a network of machines that gets their IPs >>>>>from >>>>> the router. I intend to set up cloudstack to extend our development >>>>> infrastructure, VMs in the cloud will function just like physical >>>>> machines on the network and depend on the router for dhcp and dns. My >>>>> intention is to have cloudstack manage the provisioning of VMs and >>>>> provide analysis of the cloud resources (memory, storage etc). Pretty >>>>> straightforward stuff here. >>>>> >>>>> My initial setup actually worked out ok - I created a zone with basic >>>>> networking (DefaultSharedNetworkOfferingWithSGService) and guest VMs >>>>> were >>>>> assigned IPs according to the range I specified. The VMs had access >>>>>to >>>>> the internet and were able to connect to other machines on the >>>>>network, >>>>> but DNS did not work. My sys admin was also curious about whether the >>>>> virtual router was leasing out IPs to physical machines on the >>>>>network, >>>>> could this happen? Is is better for hosts to have static IP >>>>>addresses? >>>>> >>>>> I then scratched the initial setup and created a new network offering >>>>> without DHCP, and used that instead. For this configuration, no >>>>>virtual >>>>> router came up, VMs seem to be getting IPs from the external router, >>>>> but >>>>> none of them can connect to physical machines on the network/the >>>>> internet. >>>>> >>>>> I feel like i'm close to getting the right configuration, and might >>>>> just >>>>> be missing a small detail. I'm not ready to give up yet, even though >>>>> I'm >>>>> out of ideas at this point. Any suggestions/help is much appreciated. >>>>> Thanks for reading! >>>>> >>>>> Wei >>>>> >>>>> >>>>> On Mar 7, 2013, at 6:22 PM, Bryan Whitehead >>>>> <dri...@megahappy.net<mailto:dri...@megahappy.net>> wrote: >>>>> >>>>> Create a new network offering without DHCP. After you do that create >>>>>a >>>>> new >>>>> guest network using that network offering / vlan. >>>>> >>>>> >>>>> On Thu, Mar 7, 2013 at 8:58 AM, Wei Leong >>>>> >>>>> >>>>><wle...@blackducksoftware.com<mailto:wle...@blackducksoftware.com>>wro >>>>>te >>>>> : >>>>> >>>>> Is there an easy way from the UI to create a network without using >>>>>the >>>>> virtual router? I'm running configured cloudstack with basic >>>>>networking >>>>> and >>>>> the cloudstack server sits in our network that already has a >>>>> dhcp/server >>>>> setup. I would like my guest VMs to just that instead of the virtual >>>>> router. >>>>> >>>>> According to this blog it is possible but only through the API, is >>>>> there >>>>> an alternative? >>>>> >>>>> >>>>> >>>>>http://blog.remibergsma.com/2012/03/10/howto-create-a-network-in-cloud >>>>>st >>>>> ac >>>>> k-without-a-virtual-router/ >>>> >> >
