Evolution of ethernet networks

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header

Reexamination Certificate

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Details

C370S256000, C370S390000, C370S422000, C370S395500

Reexamination Certificate

active

08005081

ABSTRACT:
An Ethernet network comprises nodes which support a plurality of different forwarding modes. A range of VLAN Identifiers (VIDs) are allocated to each of the forwarding modes. Connections are configured between a source node and a destination node of the network using different forwarding modes. Packets carrying data traffic are sent to the destination node by selectively setting a VID in a packet to a first value, to transfer a packet via a first connection and a first forwarding mode, and a second value to transfer a packet via the second connection and the second forwarding mode. Packets received from both of the connections and sent on to an end-user. VLAN Identifiers can be allocated to different releases of functionality at nodes (e.g. software releases) such that packets are forwarded via a set of nodes supporting a first release, or via a set of nodes supporting a second release. It is possible to provide a controlled and disruption-free network evolution.

REFERENCES:
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patent: 2007/0076719 (2007-04-01), Allan et al.
patent: 2008/0170583 (2008-07-01), Sultan et al.
patent: 2010/0118740 (2010-05-01), Takacs et al.
patent: 2005099183 (2005-10-01), None
International Search Report and Written Opinion dated Apr. 7, 2009 for International Application No. PCT/CA2008/002234, International Filing Date Dec. 19, 2008 (13 pages).
Allan et al, “Ethernet as carrier transport infrastructure” Communications Magazine, IEEE, Feb. 2006, pp. 95-101, vol. 44, Issue 2.
TPack, “PBB-TE, PBT: Carrier Grade Ethernet Transport”, Jun. 2007, version 2, p. 6, right-hand column, line 11, p. 10, left-hand column, line 19, figs. 2, 4. <http://www.tpack.com/fileadmin/user—upload/Public—Attachment/PBT—WP—v2—web.pdf>.

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