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Overview
This page describes the proposal of SDX use case that concerns the BGP functionality of SDN-IP application.
Association of peers with interfaces
Description
There is the case that multiple peers belong to the same AS and are connected through different connection points to the SDX controlled by ONOS. In this case, the user should be able to explicitly define the connection points to each peer. This is necessary since the identification of the appropriate interface by the application itself is not enough. Overlapping or identical subnets may exist in the "ports" section of the network configuration and thus the identification of which connection point should be used for a given peer is not straightforward.
This does not imply that all, i.e. the SDX and the peers, are in the same subnet, but the there is at least one subnet towards which there are at least 2 different connection points. This case also includes the scenario that the switch/port is the same but the VLAN_ID is different.
In other words, there is the case that the peer's IP address is not enough to specify the appropriate interface to be used for the peering session.
Do you have any objections/comments on the above? In the meantime I am thinking of ways for optional explicit configuration of pairs of peers and interfaces in a backwards compatible manner.
Best regards,
Andreas