Abstract: The link auto-configuration protocol detects the topology of a dynamic synchronous transfer mode (DTM) architecture, detects and translates MAC addresses and negotiates configuration parameters in the DTM topology. The link auto-configuration protocol has at least three phases including a detect phase to detect information about the nodes in the network, an announcement phase to provide and negotiate configuration parameters with the nodes in the network and a commit phase to commit the nodes to the configuration parameters. The protocol may automatically switch between ring and bus topology configurations.

Abstract: The packet processor system has a port for receiving packets from a first network. A line interface unit is connected to the port for determining the types of packets that are received by the port. A generic pipeline stage assembly is connected to the line interface unit and includes a plurality of generic pipeline stages each having a request engine for sending lookup requests to a lookup engine and a modifier engine for receiving lookup results from the lookup engine. A packet memory is connected to a last generic pipeline stage of the generic pipeline stage assembly and an output line interface unit is connected to the packet memory and a second network.

Abstract: A backplane for a dynamic synchronous transfer mode network that comprises two dual ring topologies having opposite fiber direction. The ring topologies has a plurality of disjointed segments that permits the simultaneous transmission of signals in the same time slots over the disjointed segments.

Abstract: A device and method for mapping 65-bit DTM slots onto an optical network system that is based on bytes of 8 bits is described. The 64 data bits of each DTM slot are separated from the single control bit. The data bits are then grouped into a set of 8-bit bytes while all the single control bits are grouped into separate control byte groups. The separation of the data bytes from the control bytes eliminates the need for 8B10B encoding and the number of DTM slots may be adapted to the particular optical network used so that the number of bits of the DTM slots is an integral multiple of the size of the optical network interface.

Abstract: A dynamic synchronous transfer mode network that comprises two ring topologies having opposite fiber direction. The first dynamic synchronous transfer mode ring topology has a plurality of nodes for receiving and transmitting frames. The time slots are dynamically allocated to the nodes and the first ring topology is adapted to transmit frames only in a first fiber direction. The second dynamic synchronous transfer mode ring topology also has a plurality of nodes in common with the first ring topology. The second ring topology only transmits frames in a second direction that is opposite the first fiber direction.

Abstract: The dynamic synchronous transfer mode dual ring topology has two rings with opposite fiber directions. The dual rings may have a plurality of common nodes. A first channel may be established in a first segment extending between a first and second nodes. Tokens associated with the first channel may be provided. In this way, time slots may be transmitted in the first channel from the first node to the second node. If a fiber failure occurs in the first segment, the second node is likely to first detect the fiber failure and transmit a fiber failure message. It is then determined if the first channel extends across the fiber failure. If the first channel is affected by the fiber failure then a channel failure message is transmitted and the first channel is terminated and all the tokens associated with the first segment are removed. If the first channel is not affected then time slots are continued to be transmitted on the first channel.

Abstract: Idle messages are transmitted by an expansion node into the ring topology until the first idle message arrives to the expansion node after having passed through the entire ring. Frames may then be transmitted by the expansion node at every cycle time. The expansion node has an expansion buffer that may receive incoming frames and stores the frames until the next cycle time. The frame stored in the buffer may then be transferred to transmission side of the expansion node and transmitted into the ring topology. If there is no frame stored in the buffer at the beginning of a new cycle time, the expansion node may generate a new frame and transmit the new frame into the ring topology.