[openstack-dev] [neutron] Re: [Blueprint vlan-aware-vms] VLAN aware VMs

Erik Moe emoe264 at gmail.com
Tue Dec 17 14:36:29 UTC 2013


Hi,

thanks for your comments.

see answers below.

Thanks,
Erik


On Tue, Dec 17, 2013 at 6:17 AM, Isaku Yamahata <isaku.yamahata at gmail.com>wrote:

> Added openstack-dev
>
> The document is view-only. So I commented below.
>
> - 2 Modeling proposal
>   What's the purpose of trunk network?
>   Can you please add a use case that trunk network can't be optimized away?
>

In some use cases the trunk network will trunk all VLANS from a VM, so they
can for example be 'tunneled' to another VM or externally. In the use case
where a VM wants to connect to multiple Neutron networks, the trunk network
is a logical connection between the VM trunk port and the L2-gateways. From
my point of view it looks a little strange for this use case, but I think
this is what we said during our meeting in Hong Kong (Unless I
misunderstood something...).

I added use case where two VMs are connected through a trunk network. This
can not be optimized away. The network would have to be able to trunk all
VLANs between the VMs.


>
> - 4 IP address management
>   nitpick
>   Can you please clarify what "the L2 gateway ports" in section 2
>   modeling proposal, figure 1?
>
>
I have now tried to clarify this more.


> - Table 3
>   Will this be same to l2-gateway one?
>   https://blueprints.launchpad.net/neutron/+spec/l2-gateway
>
>
I will try to align to this and maybe other proposals as much as possible.
Just wanted to have some feedback before I do too many assumptions.


> - Figure 5
>   What's the purpose of br-int local VID?
>   VID can be directly converted from br-eth1 VID to VM VID untagged.
>
>
Unless something has changed, all vNICs handled by OVS-agent are connected
to br-int. br-int has a local VID for separating traffic. br-int is
connected to one or more other bridges representing one or more physical
networks. The br-int VID is mapped to a per bridge VID, so two separate
Neutron networks could have the same VID on two different physical networks.




> --
> Isaku Yamahata <isaku.yamahata at gmail.com>
>
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