1. A traffic management device (TMD) interposed between a client device and a plurality of server devices, comprising: a transceiver to send and receive data over a network; and a processor that is operative to perform actions comprising: receiving an Authentication, Authorization, and Accounting (AAA) handshake message from the client device; forwarding the AAA handshake message to the plurality of server devices; receiving an AAA handshake response message from each of the plurality of server devices; extracting attributes from each of the AAA handshake response messages; modifying the extracted attributes based on one or more attributes of the plurality of server devices; and routing an AAA request message received from the client device to one of the plurality of server devices based on the extracted and modified attributes, and wherein each type of AAA message is communicated over an asynchronous protocol.