[Openstack] DHCP + vlan

Tomas Vondra vondra at czech-itc.cz
Tue Mar 22 17:52:20 UTC 2016


Sergey Arlashin <sergeyarl.maillist at ...> writes:

> 
> Hi All,
> 
> I have a simple VLAN-based setup: single controller node and multiple 
> compute nodes. Currently neutron DHCP agent resides on controller node 
> and uses dnsmasq as a DHCP server.
> 
> mean controller node) VLAN tags are stripped from incoming packets (due 
> to external network configuration which I'm not authorized to change). 
> 
> Thank you!
> 
> Regards,
> Sergey
> 
> 


Hi!
If you do not have a VLAN-clean network, then it is pointless to try to make
VLAN-based networking work. The traffic will mix, IP addresses will collide,
and generally bad things will happen. Either use flat networking or, if you
need tenant isolation, use GRE or VXLAN tunnels.
Tomas





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