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

Leo Y minherz at gmail.com
Sat Mar 7 12:02:36 UTC 2015

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? If the latter is correct, then what happens when a network
topology is changed in neutron DB (due user intervention for by other
actions) and the "local" data is invalid?
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