CONTROL MESSAGE ROUTING WITHIN ANYCAST RELIANT PLATFORMS

摘要

Some embodiments provide a transport session discovery protocol that enables load balancing devices of an Anycast reliant distributed platform to route legacy control messages to destinations within the distributed platform that manage the sessions or connections implicated by the legacy control messages, even when the implicated sessions or connections cannot be directly identified from the control message headers. The modified load balancing operation as a result of the transport session discovery protocol involves identifying a message header mapping to an unrecognized session or connection, extracting session or connection identifying information and an error or condition from the message body, generating a new messaging construct to encapsulate the extracted information, and multicasting the messaging construct to other load balancing devices operating within a common point-of-presence. The load balancing device having knowledge of the server managing the implicated session then routes the error or condition to that server.

主权项

1. A method for directing control messages in a Point-of-Presence (PoP) comprising a plurality of load balancing devices and a plurality of servers with the plurality of servers providing at least one of content and services to different clients, the method comprising:
passing during an established session between a particular server of the plurality of servers and a client, a packet addressed from a first address of the PoP to a second address of the client; receiving at a first load balancing device of the plurality of load balancing devices, a control message comprising an error or status condition, a first header of the control message, and a second header of the packet, wherein the first header specifies a third address of an intermediary node outside the PoP and the first address, and wherein the second header specifies the first address and the second address; and sending a new control message from the first load balancing device to all other load balancing devices of the plurality of load balancing devices when the addressing from the first header or the second header does not implicate a session that is tracked by the first load balancing device, wherein the new control message comprises the first address and the second address extracted from the second header and said error or condition status.