Open Stack

Maybe this blueprint can meet some of your requirements? It allows 
specification of MTU for a network instead of a subnet, though.

https://review.openstack.org/#/c/105989/

Xu Han

On 09/12/2014 01:01 AM, Jonathan Proulx wrote:
> Hi All,
>
> I'm hoping to get this blueprint
> https://blueprints.launchpad.net/neutron/+spec/dhcp-options-per-subnet
> some love...seems it's been hanging around since January so my
> assumption is it's not going anywhere.
>
> As a private cloud operator I make heavy use of vlan based provider
> networks to plug VMs into exiting datacenter networks.
>
> Some of these are Jumbo frame networks and some use standard 1500 MTUs
> so I really want to specify the MTU per subnet, there is currently no
> way to do this.  I can get it globally in dnsmasq.conf or I can set it
> per port using extra-dhcp-opt neither of which really do what I need.
>
> Given that extra-dhcp-opt is implemented per port is seems to me that
> making a similar implementation per subnet would not be a difficult
> task for someone familiar with the code.
>
> I'm not that person but if you are, then you can be my Neutron hero
> for the next release cycle :)
>
> -Jon
>
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