Hi,
If two VMs running on the same host communicate (i.e. sending large files) via network, does it actually consume the network bandwidth?
thanks for your helpful information
Hi Skyo,
I Feel its completely depend on you configuration.
@kumar lakshman kumar, thanks for your answer. In the case of 1 (both the VMs are booted on same network), are they affected by the quota (i.e. quot:vif_inbound_average)?
It depends on your configuration.In Vlan tagging deployment : If you have 2 vms, which belong the same tenant and are on the same physical host then all the packets are tagged with a local vlan tag (fe 2) and hence when the packets reach the br-int they are just forwarded to the right host . without getting outside the physical host. I am pretty sure something similar happens if you have GRE or VxLAn. I dont know about FlatDchp configurations
@kumar lakshman kumar wrote :-
if you booted both the VMs on different network,it should go to neutron controller to resolve the VM location/address
In case of VXLAN tunneling deployment I would follow https://assafmuller.com/2014/05/21/ov...
Assuming ML2 + OVS >= 2.1:
Turn on GRE or VXLAN tenant networks as you normally would
Enable l2pop
On the Neutron API node, in the conf file you pass to the Neutron service (plugin.ini / ml2_conf.ini):
[ml2]
mechanism_drivers = openvswitch,l2population
On each compute node, in the conf file you pass to the OVS agent (plugin.ini / ml2_conf.ini):
[agent]
l2_population = True
Enable the ARP responder: On each compute node, in the conf file you pass to the OVS agent (plugin.ini / ml2_conf.ini):
[agent]
arp_responder = True
As far as I understand suggested above configuration for Neutron (API) Server (on Controller) and Neutron-openvswitch-agent running on Compute will result catching arp broadcast request issued by VM1 and respond to it via pre-populated arp-tables located on the same Compute Node due to L2POP&&ARP Responder architecture design
Asked: 2016-04-10 21:23:21 -0500
Seen: 536 times
Last updated: Apr 11 '16