Re: [openstack-dev] [neutron] How neutron calculate routing path

2015-03-09 Thread Assaf Muller
- Original Message - The L3 agent uses ARP and static routes like a normal router would. The L2 agent is where there might be differences depending on the network type used. If it's a tunnel overlay, the L2 agent may perform an ARP offload from information it has learned via the L2

Re: [openstack-dev] [neutron] How neutron calculate routing path

2015-03-08 Thread Kevin Benton
The L3 agent uses ARP and static routes like a normal router would. The L2 agent is where there might be differences depending on the network type used. If it's a tunnel overlay, the L2 agent may perform an ARP offload from information it has learned via the L2 population mechanism. On Sat, Mar

[openstack-dev] [neutron] How neutron calculate routing path

2015-03-07 Thread Leo Y
Hello, I am looking to learn how neutron agent (probably L3) calculates a new routing path when VM on compute node wants to communicate with some destination. Does it use neutron API to learn about network topology or it uses its internal structures to simulate path resolving like in real network?