[openstack-dev] [Openstack][nova][Neutron] Launch VM with multiple Ethernet interfaces with I.P. of single subnet.

Aaron Rosen aaronorosen at gmail.com
Thu Apr 17 04:20:11 UTC 2014


You can do it with ip aliasing and use one interface:

ifconfig eth0 10.0.0.22/24
ifconfig eth0:1 10.0.0.23/24
ifconfig eth0:2 10.0.0.24/24

2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN
qlen 1000
    link/ether 40:6c:8f:1a:a9:31 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.22/24 brd 10.0.0.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 10.0.0.23/24 brd 10.0.0.255 scope global secondary eth0:1
       valid_lft forever preferred_lft forever
    inet 10.0.0.24/24 brd 10.0.0.255 scope global secondary eth0:2
       valid_lft forever preferred_lft forever



On Wed, Apr 16, 2014 at 8:53 PM, Kevin Benton <blak111 at gmail.com> wrote:

> Web server running multiple SSL sites that wants to be compatible with
> clients that don't support the SNI extension. There is no way for a server
> to get multiple IP addresses on the same interface is there?
>
>
> On Wed, Apr 16, 2014 at 5:50 PM, Aaron Rosen <aaronorosen at gmail.com>wrote:
>
>> This is true. Several people have asked this same question over the years
>> though I've yet to hear a use case why one really need to do this. Do you
>> have one?
>>
>>
>> On Wed, Apr 16, 2014 at 3:12 PM, Ronak Shah <ronak at nuagenetworks.net>wrote:
>>
>>> Hi Vikash,
>>> Currently this is not supported. the NIC not only needs to be in
>>> different subnet, they have to be in different network as well (container
>>> for the subnet)
>>>
>>> Thanks
>>> Ronak
>>>
>>> On Wed, Apr 16, 2014 at 3:51 AM, Vikash Kumar <
>>> vikash.kumar at oneconvergence.com> wrote:
>>>
>>>> *With 'interfaces' I mean 'nics' of VM*.
>>>>
>>>>
>>>> On Wed, Apr 16, 2014 at 4:18 PM, Vikash Kumar <
>>>> vikash.kumar at oneconvergence.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>>      I want to launch one VM which will have two Ethernet interfaces
>>>>> with IP of single subnet. Is this supported now in openstack ? Any
>>>>> suggestion ?
>>>>>
>>>>>
>>>>> Thanx
>>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>>
>>>>
>>>
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>
>
> --
> Kevin Benton
>
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