Currently, most plugin implementations releated L3 override the
L3NatAgent class itself for their own logic since there is no proper
interface to extend RouterInfo class. This adds unnecessary complexity
for developers who just want to extend agent mechanism instead of
whole RPC related to L3 functinalities.
This spec introduces RouterFactory class which acts on the factory for
creating RouterInfo class, and add new l3 extension API which enable to
dynamically add RouterInfo to the factory. Now plugin developers can
use new extension API for their own specific router.
Change-Id: Ic3486830e449f6ee8dbe19db614179b2077bcf7b
Related-Bug: #1804634
Implements: blueprint router-factory-with-l3-extension
bd23545778