Due to a ransomware attack, the wiki was reverted to a July 2022 version. . We apologize for the lack of a more recent valid backup.
A gateway in SONA is a special compute node, which plays role as a connection point to external networks. It performs NAT and PAT for outbound traffics and also exchanges routes with external routers with BGP or OSPF. Scalable gateway provides load balancing and high availability by allowing multiple redundant gateways to the system.
Features
- Provides hash based load balancing of outbound traffics among multiple gateways
- Provides failover fail-over for a gateway failure
- Provides dynamic add or remove of gateway nodes
High Level Architecture
SONA is composed of multiple ONOS applications, and Scalable Gateway and vRouter are takes in charge of the North-South connectivity.
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- Scalable Gateway provides a gateway group to OpenstackRouting
- OpenstackRouting takes care of forwarding outbound traffic to the gateway group
- OpenstackRouting takes care of NAT/PAT at the gateways
- vRouter takes care of connectivity between GNODEs and external routers
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