摘要:
A network device for processing data includes at least one ingress module for performing switching functions on incoming data, a memory management unit for storing the incoming data in a memory and at least one egress module for transmitting the incoming data to at least one egress port. The memory management unit is configured to receive data at a clock speed for the network device and write the data to the memory using a multiplied clock speed that is a multiple of the clock speed for the network device, read out the data from the memory at the multiplied clock speed and provide the data to the at least one egress module at the clock speed for the network device, where the multiplied clock speed is used to sample the clock speed for the network device to place domains of the multiplied clock speed and the clock speed for the network device in phase.
摘要:
A network device for processing packets. The network device includes a memory management unit for storing packets and performing resource checks on each packet and an egress module for performing packet modification and transmitting the packet to a destination port. The memory management unit includes a timer for indicating that a free space should be created on a bus slot between the memory management unit and the egress module, wherein the free space is used for transmitting CPU instructions from the memory management unit to the egress module.
摘要:
A first set of instructions associated with an egress of a datagram may be determined, the first set of instructions identifying a first subset of a second set of instructions, the first subset including multiple individual network identifiers identifying which network portion to transmit a replication of the datagram. Which one of the multiple individual network identifiers corresponds to the datagram may be determined from the first subset of the second set of instructions and may be based on the egress of the datagram, wherein each network identifier corresponds to a different egress. The replication of the datagram may be provided to the egress of the determined network identifier for transmission to the network portion as identified by the determined network identifier corresponding to the datagram.
摘要:
A method and a system for allocating memory in a memory buffer that is part of a data distribution device. Generally, the allocation of memory is for the purpose of storing datagrams. The method allocates memory in the buffer based, at least partially, on how ingress ports that are operably connected to the memory buffer have previously used the buffer to store datagrams. The system typically includes one or more detectors that monitor how various ingresses into the data distribution device are using and have used the memory buffer.
摘要:
A method and a system for allocating memory in a memory buffer that is part of a data distribution device. Generally, the allocation of memory is for the purpose of storing datagrams. The method allocates memory in the buffer based, at least partially, on how ingress ports that are operably connected to the memory buffer have previously used the buffer to store datagrams. The system typically includes one or more detectors that monitor how various ingresses into the data distribution device are using and have used the memory buffer.
摘要:
Disclosed are various embodiments that provide serial replication of multicast packets by performing a first data fetch to fetch first data from a memory buffer, the first data comprising a first packet pointer representing a first packet and a replication number indication a number of times the first packet is to be replicated. Furthermore, various embodiments are directed to performing a second data fetch to fetch second data from a memory buffer, the second data comprising a first packet pointer representing a second packet and serially replicating the first packet and the second packet based at least in part upon the replication number and a predetermined threshold value.
摘要:
Methods, systems, and devices are provided for managing flow of datagram traffic, generally across networks. According to some of these methods, a flow control mechanism is used to avoid over-subscription of some ports without pausing extended areas of a network. According to other methods, a congestion control mechanism is used to minimize datagram traffic between a port sending datagrams to an over-subscribed port and the over-subscribed port itself.
摘要:
A network device for scheduling packets in a plurality of queues includes a plurality of leaky bucket modules, each of the plurality of leaky bucket mechanisms being associated with one of a plurality of queues and configured to process information based on a predefined bandwidth, a scheduler configured to schedule services of the plurality of queues and a metering module for tracking whether or not the plurality of queues has exceeded a predefined threshold through the leaky bucket modules. If the plurality of queues has exceeded the predefined threshold, the metering module is configured to compute a new bandwidth allocation for each of the plurality of queues, the new bandwidth allocation replacing the predefined bandwidth and being proportional to the predefined bandwidth for each of the plurality of queues.
摘要:
The present invention is directed to a network device, method and apparatus for processing data. The present invention includes at least one ingress module for performing switching functions on incoming data. The invention further includes a memory management unit (MMU) for storing the incoming data, and at least one egress module for transmitting the incoming data to at least one egress port. Further, in the present invention, the memory management unit further comprises a cell copy count pool (CCP) memory, wherein the CCP determines when a memory cell can be made available.
摘要:
Methods for aging datagrams in the memory portion of a datagram distribution device or other network device are provided. According to some of these methods, an attribute of each datagram entering the device may be used to assign an initial aging counter value to each datagram. Then, the attribute-specific aging counter values may be used to extend the time until expiration of certain datagrams relative to other datagrams. Also, devices for implementing these methods are provided.