Tellabs Operations, Inc.

Tellabs, Inc.

Tellahs Operations, Inc.

Gowri Kuthanur

Sasha Cirkovic

Pawan K Singal

Tejeswar Pichuka

James L Brede

A network layout between network elements and routers using network redundancy to improve reliability of network communication is disclosed. Upon detecting a link failure associated with a primary link between an access switch and a primary router by the access switch via a connectivity verification protocol, the access switch sends a message to the primary router indicating connection defect via the connectivity verification protocol such as IEEE 802.1ag standard. After enabling protection switching mechanism to activate a secondary link between the access switch and a backup router for network communication, routing data streams are routed between the access switch and the router via the secondary link. In one aspect, the protection switching mechanism is operated in accordance with G.8031 under International Telecommunication Union ('ITU') standard.

Methods and apparatus for improving network communication using ethernet switching protection

Embodiments of the present invention illustrate a network configuration having a subscriber node, a multiservice router ('MSR'), and an edge router, wherein the MSR is able to provide end-to-end fault notifications across a multiservice environment. The MSR, for example, provides a process capable of translating a fault notification between two or more protocols. Upon receipt of a first fault notification formatted in a first protocol over a first circuit from a subscriber node, MSR translates the first fault notification to a second fault notification which is formatted in the second protocol. The first protocol and second protocol are different protocols. The second fault notification is subsequently sent from the MSR to an edge router via a second circuit.

Methods and apparatus for enhancing fault management using inter-working between PPP and ethernet

A network configuration having multiple network elements and routers using point-to-point network redundancy to improve network reliability and performance is disclosed. A process using point-to-point network redundancy is able to detect a first checking message ('CM') formatted in a connectivity verification protocol ('CVP') such as IEEE 802.1ag indicating a primary link failure. The primary link is a connection between a first network element (&#x201c;NE&#x201d;) situated in a first network such as Ethernet based LAN network and a second NE situated in a second network such as an IP based MPLS network. Upon sending a second CM indicating the primary link failure to the second NE, a coordinated failover from the primary link to the backup link at both first and second NEs is performed.

Methods and apparatus for improving reliability of point-of-point network connection

A network layout between network elements and routers using network redundancy to improve reliability of network communication is disclosed. Upon detecting a link failure associated with a primary link between an access switch and a primary router by the access switch via a connectivity verification protocol, the access switch sends a message to the primary router indicating connection defect via the connectivity verification protocol such as IEEE 802.1 ag standard. After enabling protection switching mechanism to activate a secondary link between the access switch and a backup router for network communication, routing data streams are routed between the access switch and the router via the secondary link. In one aspect, the protection switching mechanism is operated in accordance with G.8031 under International Telecommunication Union ('ITU') standard.

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San Jose, CA, United States of America

Gowri Kuthanur