openstack team mailing list archive

[Lorin Hochstein <lorin@xxxxxxxxxxxxxxxxxx>]

On Jun 4, 2012, at 8:22 PM, romi zhang wrote:

> Hi,
>  
> I am using VLAN network mode and will connect eth1 and eth2 of my compute node to the LAN Switch, and LAN switch will create individual VLAN IP interface for each Tenant/VLAN and then route to the NAT equipment,through SNAT/DNAT to touch internet. So, that needs I can set the default gateway of each Tenant VLAN to the different IP address of VLAN interface on the switch.

I have the same question, I would love to know if you can set the gateways in VLAN mode. 

>  
> For example, my first tenant(auto0Tenant) is at VLAN200/br200/eth1/fix_ip range is 192.168.2.0/28 and second(aotu1Tenant) is VLAN300/br300/eth2/fix_ip_range 192.168.3.0/28, the VLAN interface ip address for them on switch is 192.168.2.9 and 192.168.3.9, I want to set the default gateway of VMs in auto0Tenant to 192.168.2.9 and 192.168.3.9 for aotu1Tenant’s VMs.
>  
> I try to use two methods, the first is to use nova-command:
>  
> nova-manage network create --label=auto0Tenat --fixed_range_v4=192.168.2.0/28 --num_networks=1 --gateway=192.168.2.9 --dns1=61.139.2.69 --vlan=200 --bridge=br200 --bridge_interface=eth1 --network_size=16 --multi_host=T --project_id=5f9281bca6854fe3974a457d81afd78c
>  
> nova-manage network create --label=aotu1Tenant --fixed_range_v4=192.168.3.0/28 --num_networks=1 --gateway=192.168.3.9 --dns1=61.139.2.69 --vlan=300 --bridge=br300 --bridge_interface=eth2 --network_size=16 --multi_host=T --project_id=5f9281bca6854fe3974a457d81afd78c
>  
> but the result is the newest created VM default gateway is still the IP address of br200 or br300 by the system, that means the factor of “gateway” and “dns1” in nova-mange network command did not work.
>  
> The second way is to use dnsmasq.conf that Vish told me, that I set just dhcp_option=3,192.168.2.9. Yes it is useful for auto0Tenat VLAN, it can set auto0Tenant gateway to 192.168.2.9, but how to set others at the same time?
>  
> Then I tried to use:
>  
> Interface=vlan200
> dhcp_option=3,192.168.2.9
>  
> Interface=vlan300
> dhcp_option=3,192.168.3.9
>  


Does it actually work to specify multiple interfaces in the dnsmasq conf file like that? I would have thought that the second values would override the first ones.


Take care,

Lorin
--
Lorin Hochstein
Lead Architect - Cloud Services
Nimbis Services, Inc.
www.nimbisservices.com

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