System and method for performing version negotiation of a...

Details System and method for performing version negotiation of a... System and method for performing version negotiation of a...

2005-04-29

2008-12-16

Pezzlo, John (Department: 2619)

Multiplex communications

Diagnostic testing

Determination of communication parameters

C370S278000, C370S466000

Reexamination Certificate

active

07466659

ABSTRACT:
A system and method efficiently performs version negotiation of a network protocol executing on storage systems or nodes of a cluster. A session layer of a network protocol executing on the nodes manages the creation and termination of sessions between a pair of nodes in the cluster. Notably, session version negotiation occurs during session creation and, as such, is accomplished using a single request/response “create session” exchange. Session version negotiation is effected using contents of protocol tag and version fields of headers associated with the request and response messages exchanged between the nodes. The version field contains a proposed version of the protocol for use by the nodes in the session. The protocol tag field contains values or tags that define the context in which the request and response messages are used during the create session exchange. Interface version negotiation is performed after session version negotiation. The session layer version negotiation includes negotiation of the version of a small set of operations. One of these operations can be used to subsequently negotiate the versions of many additional sets of operations, even though these operations co-exist at the same level of encapsulation in the protocol.

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patent: 10003440 (1998-06-01), None
patent: WO 00/07101 (2000-02-01), None

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