Abstract: A method for testing connectivity of a multi-segment pseudo-wire (“MS-PW”) in a network, the method comprising: sending an echo request message from a first provider edge (“PE”) device to a second provider edge (“PE”) device for a section of the multi-segment pseudo-wire (“MS-PW”) between the first provider edge (“PE”) device and the second provider edge (“PE”) device; the echo request message being identified as such by a control word contained therein; an inner label of the echo request message having a time-to-live (“TTL”) value set to a number of segments in the section; the time-to-live (“TTL”) value for determining whether the control word is to be inspected as it traverses the section; upon the echo request message arriving at the second provider edge (“PE”) device, the second provider edge (“PE”) device recognizing the echo request message as such by inspecting the control word contained therein; and, receiving an echo reply message from the second provider edge (“PE”) device in response to the echo r

Abstract: Embodiments described herein are effective to detect, repair and recover automatically IPSec tunnels due to failures of transport gear (L2/L3 switches) as well as the IPsec gateway components. Load balance is also an integral part of the approach. When a failure is repaired, the architecture in various embodiments will re-establish load balance and high availability automatically at L2 and L3 and preserve security during the switch-over and recovery process.

Abstract: A method for testing connectivity of a multi-segment pseudo-wire in a packet switched network, the method comprising: (a) sending an echo request message from a first provider edge device to a second provider edge device for a first segment of the multi-segment pseudo-wire between the first provider edge device and the second provider edge device; and, (b) receiving an echo reply message from the second provider edge device in response to the echo request message, the echo reply message: confirming connectivity of the first segment; indicating whether there is a second segment in the multi-segment pseudo-wire between the second provider edge device and a third provider edge device; and, if there is a second segment, including information pertaining to the second segment.

Abstract: Providing a network service is disclosed. A data associated with the service is received. It is determined whether a local context associated with the service is in an active state with respect to the service. The data is redirected to another chassis, via an inter-chassis backup connection, if it is determined that the local context is not in an active state with respect to the service.

Abstract: A system and method for providing APS (automatic protection switching) redundant pair control protocol signaling for multi-nodal APS (MN-APS) is provided. Periodic liveliness messages are exchanged between each node of a redundant pair. Each liveliness message contains an IHY (I heard you) message which indicates whether or not the sender of the liveliness message received within a duration of a hold time a previously transmitted liveliness message from the recipient. When more than one MN-APS group is configured between two redundant nodes, liveliness messages are bundled together to reduce processing loads.

Abstract: A method for testing connectivity of a multi-segment pseudo-wire (“MS-PW”) in a network, the method comprising: sending an echo request message from a first provider edge (“PE”) device to a second provider edge (“PE”) device for a section of the multi-segment pseudo-wire (“MS-PW”) between the first provider edge (“PE”) device and the second provider edge (“PE”) device; the echo request message being identified as such by a control word contained therein; an inner label of the echo request message having a time-to-live (“TTL”) value set to a number of segments in the section; the time-to-live (“TTL”) value for determining whether the control word is to be inspected as it traverses the section; upon the echo request message arriving at the second provider edge (“PE”) device, the second provider edge (“PE”) device recognizing the echo request message as such by inspecting the control word contained therein; and, receiving an echo reply message from the second provider edge (“PE”) device in response to the echo r

Abstract: Providing a network service is disclosed. A data associated with the service is received. It is determined whether a local context associated with the service is in an active state with respect to the service. The data is redirected to another chassis, via an inter-chassis backup connection, if it is determined that the local context is not in an active state with respect to the service.

Abstract: A method for testing connectivity of a multi-segment pseudo-wire in a packet switched network, the method comprising: (a) sending an echo request message from a first provider edge device to a second provider edge device for a first segment of the multi-segment pseudo-wire between the first provider edge device and the second provider edge device; and, (b) receiving an echo reply message from the second provider edge device in response to the echo request message, the echo reply message: confirming connectivity of the first segment; indicating whether there is a second segment in the multi-segment pseudo-wire between the second provider edge device and a third provider edge device; and, if there is a second segment, including information pertaining to the second segment.

Abstract: A system and method for providing APS (automatic protection switching) redundant pair control protocol signaling for multi-nodal APS (MN-APS) is provided. Periodic liveliness messages are exchanged between each node of a redundant pair. Each liveliness message contains an IHY (I heard you) message which indicates whether or not the sender of the liveliness message received within a duration of a hold time a previously transmitted liveliness message from the recipient. When more than one MN-APS group is configured between two redundant nodes, liveliness messages are bundled together to reduce processing loads.