摘要:
Methods and systems are provided for steering network packets. According to one embodiment, a dynamically configurable steering table is stored within a memory of each network interface of a networking routing/switching device. The steering table represents a mapping that logically assigns each of the network interfaces to one of multiple packet processing resources of the network routing/switching device. The steering table has contained therein information indicative of a unique identifier/address of the assigned packet processing resource. Responsive to receiving a packet on a network interface, the network interface performs Layer 1 or Layer 2 steering of the received packet to the assigned packet processing resource by retrieving the information indicative of the unique identifier/address of the assigned packet processing resource from the steering table based on a channel identifier associated with the received packet and the received packet is processed by the assigned packet processing resource.
摘要:
Methods and systems are provided for steering network packets. According to one embodiment, a mapping associates a processing resource with a network interface module (netmod) and/or a number of line interface ports included within the netmod. In one embodiment, the mapping is configurable within the processing resource and pushed to the netmod. The netmod uses the mapping to steer network packets to the processing resource when the packets conform to the mapping. The mapping may be additionally used to identify a specific process that is to be performed against the packets once the processing resource receives the steered packets from the netmod.
摘要:
Methods and systems are provided for bridging heterogeneous media packets using a single processor resource having a virtual bridge. Network interfaces associated with heterogeneous media channels relay network packets to the virtual bridge. The virtual bridge accesses metadata associated with the relayed network packets and translates the network packets between media formats. The translated network packets are then relayed to an appropriate network interface. In one embodiment, the virtual bridge is dynamically configurable within the processing resource.
摘要:
Methods and systems are provided for steering network packets. According to one embodiment a method is provided for steering incoming network packets. Each network packet processing resource of a network routing/switching device is dynamically assigned to one or more network interfaces of the network routing/switching device. Each of the network packet processing resources includes one or more processing elements and a memory. Incoming network packets received by the network interfaces are steered to an appropriate network packet processing resource based on the dynamic assignment.
摘要:
A system and method for dynamically selecting a level of compression to be applied to data to be served to a client. The level of compression may be selected on the basis of one or more factors, such as: the bandwidth of a communication link between the client and a server, the amount of data requested by the client, the workload of the server, whether the data are cacheable, etc. The server can readily obtain information such as the amount of requested data and the available CPU time on the server. To determine the bandwidth, the server may conduct a test transfer of a known amount of data to or from the client, or consult a database identifying known or expected bandwidths for specific client connections (or addresses). Based on the selected factor(s), the server dynamically selects a level of compression for the data.
摘要:
Techniques for automatically modifying behavior of a compiled application include receiving a first set of compiled instructions for the application. The first set of compiled instructions is modified to generate a modified set of compiled instructions. Modifying the first set of compiled instructions includes inserting a new set of one or more instructions for invoking a first routine that provides new behavior. The first routine is not part of the first set of compiled instructions. These techniques allow an administrator to automatically instrument compiled code of an application to provide new behavior for the application without taking the application offline for substantial periods of time. In particular, the techniques allow a service provider to automatically instrument existing applications, components, and sub-components to measure and respond to server-side performance without taking the applications offline.
摘要:
A method and apparatus for detecting peer traffic based on a heuristic model and deep packet inspection is described. A suspect set of peer packets is detected using a heuristic model. From the suspect set of peer packet, a set of verified peer packets is detected using deep packet inspection. The set of verified peer packets is processed according to the peer processing policy, while the non-verified peer packets is processed according a non-peer policy. Furthermore, the statistics are generated from the set of suspect peer packet. These statistics are used to update the heuristic model.
摘要:
Methods and systems for bridging network packets transmitted over heterogeneous media channels are provided. According to one embodiment, a network-computing device comprises multiple network interfaces (netmods) and a shared processing resource. The shared processing resource executes a virtual bridging application representing a single bridging domain for all network packets received by the network-computing device. A translation data structure defines translations between a first framing media format and an intermediate format and between the intermediate format and a second framing media format. If the virtual bridging application determines a network packet is to be relayed between a netmod operable to receive network packets encapsulated within the first framing media format and a netmod operable to transmit network packets encapsulated within the second framing media format, then it uses the translation data structures to translate the network packet before relaying the network packet.
摘要:
A method and apparatus for detecting, peer traffic based on a heuristic model and deep packet inspection is described. A suspect set of peer packets is detected using a heuristic model. From the suspect set of peer packet, a set of verified peer packets is detected using deep packet inspection. The set of verified peer packets is processed according to the peer processing policy, while the non-verified peer packets is processed according a non-peer policy. Furthermore, the statistics are generated from the set of suspect peer packet. These statistics are used to update the heuristic model.
摘要:
A virtual routing platform includes a line interface a plurality of virtual routing engines (VREs) to identify packets of different packet flows and perform a hierarchy of metering including at least first and second levels of metering on the packet flows. A first level of metering may be performed on packets of a first packet flow using a first metering control block (MCB). The first level of metering may be one level of metering in a hierarchy of metering levels. A second level of metering on the packets of the first packet flow and packets of a second flow using a second MCB. The second level of metering may be another level of metering in the hierarchy. A cache-lock may be placed on the appropriate MCB prior to performing the level of metering. The first and second MCBs may be data structures stored in a shared memory of the virtual routing platform. The cache-lock may be released after performing the level of metering using the MCB. The cache-lock may comprise setting a lock-bit of a cache line index in a cache tag store, which may identify a MCB in the cache memory. The virtual routing platform may be a multiprocessor system utilizing a shared memory having a first and second processors to perform levels of metering in parallel. In one embodiment, a virtual routing engine may be shared by a plurality of virtual router contexts running in a memory system of a CPU of the virtual routing engine. In this embodiment, the first packet flow may be associated with one virtual router context and the second packet flow is associated with a second virtual router context. The first and second routing contexts may be of a plurality of virtual router contexts resident in the virtual routing engine.