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Posted to issues@cloudstack.apache.org by "Radhika Nair (JIRA)" <ji...@apache.org> on 2013/06/04 13:13:19 UTC
[jira] [Assigned] (CLOUDSTACK-2607) [DOC][Multiple IPs PerNic] Best
practices when VMs are connected to multiple networks
[ https://issues.apache.org/jira/browse/CLOUDSTACK-2607?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Radhika Nair reassigned CLOUDSTACK-2607:
----------------------------------------
Assignee: Radhika Nair
> [DOC][Multiple IPs PerNic] Best practices when VMs are connected to multiple networks
> -------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-2607
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-2607
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the default.)
> Components: Doc, Network Controller
> Affects Versions: 4.2.0
> Environment: commit # 85d54cd1c088997dd08f0328984bee1a55703636
> Reporter: venkata swamybabu budumuru
> Assignee: Radhika Nair
> Fix For: 4.2.0
>
>
> Steps to reproduce :
> 1. Have a latest CloudStack setup with at least 1 advanced zone (in my case, I have a setup with KVM cluster running with 1 host)
> 2. Have at least one non-ROOT domain user
> 3. Login as the above user and create 2 networks
> ISOLATED NETWORKS :
> Network1 => 10.1.1.0/24 => VLAN : 900
> Network2 => 10.1.1.0/24 => VLAN : 904
> 4. Create a VM (VM1) with two NICs connected to the above 2 networks
> NIC1 => Network1
> NIC2 => Network2
> 5. Have at least one secondary IP associated with NIC2
> NIC2 => Secondary IP => 10.1.1.121
> NOTE : Make sure that the above ip is aliased properly on the right interface
> for ex : ip addr add 10.1.1.121/32 dev eth1
> 6. Create a PF rule on Network2 and map it to the above secondary IP 10.1.1.121
> 7. Make sure that you are able to access the above PF rule without any issues.
> 8. Deploy another VM (VM2) with two NICs connected to the above networks
> NIC1 => Network1
> NIC2 => Network2
> 9. Have at least one secondary IP associated with NIC1 with the same IP as mentioned in Step 5
> NIC1 => Secondary IP => 10.1.1.121
> NOTE : Make sure that the above ip is aliased properly on the right interface
> for ex : ip addr add 10.1.1.121/32 dev eth0
> Observations:
> (i) The above situation landed in IP conflict.
> (ii) Though the PF rule is created on Network2, it sometimes takes it to the VM2 NIC0 rather VM1:NIC1
> To avoid situation like above, we may have to add documentation on how we can avoid.
> ===============================================================
> One way of avoiding it is : Configuring different subnets when there are multiple networks connected to the same VM.
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