Transient loop prevention in a hybrid layer-2 network

Details Transient loop prevention in a hybrid layer-2 network Transient loop prevention in a hybrid layer-2 network

2009-05-29

2011-12-13

Kizou, Hassan (Department: 2472)

Multiplex communications

Network configuration determination

Using a particular learning algorithm or technique

C370S216000, C370S229000, C370S230000, C370S254000, C370S256000, C709S252000

Reexamination Certificate

active

08077633

ABSTRACT:
In one embodiment, a first switch at a border between a first network of a first protocol (P1 network) and a first network of a second protocol (P2 network) is interconnected via the first P1 network with a second switch between a second P1 network (interconnected with the first P1 network) and a second P2 network. In response to detecting a merge of the first and second P2 networks, the first switch may: i) block data packets from traversing P1 network boundary ports of the first switch; ii) allow protocol messages to flow between the first and second P1 networks through the P1 network boundary ports of the first switch; iii) allow the first and second P1 networks to discover each other through the protocol messages and to prevent loops; and in response, iv) unblock the P1 network boundary ports of the first switch to allow traversal of data packets.

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PCT Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, International Application No. PCT/US2010/001488, International Filing Date: May 20, 2010, Document mailed on Aug. 30, 2010, 16 pages, European Patent Office, Rijswijk, Netherlands.

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