Protection switching over a virtual link aggregation
Granted: May 24, 2016
Patent Number:
9350680
One embodiment of the present invention provides a switch. The switch comprises one or more ports and a link management module. The link management module operates a first aggregate link group as an active aggregate link group of a protected virtual link aggregation. This protected virtual link aggregation operates as a single logical channel. An aggregate link group comprises a plurality of logically aggregated links. The first aggregate link group, which represents the logical channel,…
Hierarchical rate color marker
Granted: May 24, 2016
Patent Number:
9350674
One embodiment provides a system that facilitates bandwidth-profile enforcement. During operation, the system indicates a packet's compliance with a bandwidth profile based at least on available high-compliance tokens and medium-compliance tokens. The system further converts, within different classes of service (CoSs), an overflow high-compliance token to a medium-compliance token, in a top-down or bottom-up fashion with respect to different CoS priorities.
Spanning-tree based loop detection for an ethernet fabric switch
Granted: May 24, 2016
Patent Number:
9350564
One embodiment of the present invention provides a switch. The switch includes a local database, a packet processor, a data management module, and a tree construction module. The packet processor extracts spanning tree information associated with a remote switch. The data management module stores the extracted spanning tree information in the local database. The tree construction module assigns an interface state associated with a spanning tree to a local interface based on the extracted…
Transparent high availability for stateful services
Granted: May 17, 2016
Patent Number:
9342348
One embodiment of the present invention provides a system. The system includes a high availability module and a data transformation module. During operation, the high availability module identifies a modified object belonging to an application in a second system. A modification to the modified object is associated with a transaction identifier. The high availability module also identifies a local object corresponding to the modified object associated with a standby application…
Method and system for congestion management in a fibre channel network
Granted: May 17, 2016
Patent Number:
9342339
One embodiment of the present invention provides a system that facilitates congestion management in a Fibre Channel (FC) network. During operation, the system determines a threshold data rate on an outgoing link coupled to an FC switch. The system further determines the number of sources that send data to the outgoing link and an aggregate arrival rate of data for the outgoing link. Next, the system determines an injection data rate for a respective source based on the threshold data…
Domain name system security extensions (DNSSEC) for global server load balancing
Granted: May 10, 2016
Patent Number:
9338182
Techniques are provided to enable a network device, such as a switch, to perform global server load balancing (GSLB) while operating as a proxy to a domain name system security extensions (DNSSEC)-capable authoritative DNS server. The network device preserves an original signature generated by the DNSSEC-capable authoritative DNS server for a resource record set contained in a DNSSEC reply.
Multiple ring identification and configuration protocol
Granted: May 10, 2016
Patent Number:
9338060
A protocol identifies and configures rings in a network topology automatically in order to simplify and quicken the actions that need to be performed in response to addition, deletion and shuffle of network nodes in that topology. Such rings do not need to be identified and configured manually. The protocol involves two separate sequentially performed phases. In the first phase, the protocol can automatically identify all rings that are present within a Virtual Local Area Network (VLAN)…
Storage of keyID in customer data area
Granted: April 26, 2016
Patent Number:
9324123
A key identifier for an encryption key repository is stored with customer data on a logical device. When the customer data is compressible, the key identifier is stored in space freed by compressing the customer data. When the customer data is not compressible, a portion of the customer data is copied to a key record in the key repository identified by the key identifier, and the key identifier overwrites the copied customer data.
System and method for end-to-end beaconing
Granted: April 19, 2016
Patent Number:
9319462
An embodiment of a method includes generating a command configured to cause activation of local beaconing at a selected device, and transmitting the command to the selected device. An embodiment of a system includes a processor, a memory including instructions executable by the processor, wherein the instructions cause the processor to generate a command configured to cause a selected device to activate local beaconing, a port connected to the selected device, and a transmitter operable…
Configuration validation in a mixed node topology
Granted: April 12, 2016
Patent Number:
9313102
Techniques for validating configuration changes in a mixed node topology are provided. In one embodiment, a device can identify a link to be removed from a topology comprising a plurality of nodes, where the plurality of nodes includes one or more nodes of a first type and one or more nodes of a second type. The device can then determine whether the removal of the link from the topology would require data traffic between two nodes of the first type to pass through a node of the second…
Algorithm for long-lived large flow identification
Granted: April 5, 2016
Patent Number:
9306794
A mechanism for identifying long-lived large flows in a communication network is disclosed in which packets transmitted through ports of a switching device or router are continuously examined. As new flows are recognized, their flow definition information is processed through a hashing table that uses a predetermined number of hash stages each having a pre-selected number of hash buckets. Each hash bucket has a counter that is incremented each time flow definition information ends up in…
Plug-in module bottom rail system and method
Granted: March 29, 2016
Patent Number:
9297496
Bottom mounting rails are used to secure a double wide plug-in module or two full wide plug in-modules into a double wide bay of an electronic device. This allows the size of the electronic device to be minimized. Further, the space adjacent to the sides of plug-in modules is left open facilitating airflow through the electronic device and efficient cooling thereof. The bottom mounting rails allow either a double wide plug-in module or two full wide plug-in modules to be readily…
Secure stacking setup
Granted: March 22, 2016
Patent Number:
9294350
A method of configuring a stack includes: connecting stacking ports of a plurality of stackable devices using one or more stacking links; connecting a user console to a first one of the stackable devices; transmitting a stack setup command from the user console to the first stackable device; and establishing a stack in response to the stack setup command. The stack is established by initiating a discovery process with the first stackable device in response to the stack setup command,…
Tilted printed circuit board installation
Granted: March 8, 2016
Patent Number:
9282671
A blade for a chassis-based system includes a printed circuit board (PCB) mounted at a tilt angle within the blade. The tilt angle provides space above or below the PCB at the front end of the blade, such that media interface modules can be flexibly positioned within the blade. A tilt angle that positions the PCB higher near the front end of the blade may enable media interface modules mounted in a belly-to-belly configuration on the PCB to be fitted within the front end of the blade. A…
Flexible stacking port
Granted: March 8, 2016
Patent Number:
9282058
A stackable device having a plurality of data ports, wherein each of the data ports is capable of operating as a regular data port or a stacking port. A first set of one or more of the data ports is specified as a first flexible stacking port, and a second set of one or more of the data ports is specified as a second flexible stacking port. Each flexible stacking port can be individually configured to operate as an actual stacking port, if required by the configuration of an associated…
Flexible stacking port
Granted: March 8, 2016
Patent Number:
9282057
A stackable device having a plurality of data ports, wherein each of the data ports is capable of operating as a regular data port or a stacking port. A first set of one or more of the data ports is specified as a first flexible stacking port, and a second set of one or more of the data ports is specified as a second flexible stacking port. Each flexible stacking port can be individually configured to operate as an actual stacking port, if required by the configuration of an associated…
Exact match lookup scheme
Granted: March 8, 2016
Patent Number:
9280609
An exact match lookup system includes a hash function that generates a hash value in response to an input hash key. The hash value is used to retrieve a hash bucket index value from a hash bucket index table. The hash bucket index value is used to retrieve a plurality of hash keys from a plurality of hash bucket tables, in parallel. The retrieved hash keys are compared with the input hash key to identify a match. Hit logic generates an output index by concatenating the hash bucket index…
Selection of environmental profile based on system configuration
Granted: March 8, 2016
Patent Number:
9279597
Method and apparatus provide for cooling a system. For example, a network communication system may include a central processing unit (CPU) and a fan controller. A chassis includes a plurality of receiving portions, each portion configured to receive a field replaceable unit (FRU). The chassis may also include a fan and a temperature sensor. The system CPU is configured to load a plurality of environmental profiles into fan controller memory, each profile indicating a fan speed for the…
Core-trunking across cores on physically separated processors allocated to a virtual machine based on configuration information including context information for virtual machines
Granted: March 1, 2016
Patent Number:
9274851
Techniques for providing core-based virtualization based upon cores provided by one or more processors of a system. A device such as a network device comprising multiple processor cores provides for core-based virtualization. According to one embodiment, a network device is provided comprising a first subsystem for processing packets received by the network device. The first subsystem may comprise a set of one or more processors, the one or more processors providing a plurality of cores.…
Synchronization of multicast information using incremental updates
Granted: March 1, 2016
Patent Number:
9276756
Techniques that enable a network device such as a router to provide multicast routing services without interruption, even in the event of a switchover. An incremental updates technique is used to synchronize multicast information maintained by a first processor and multicast information maintained by a second processor. The first processor may be a management processor operating in active mode in a network device and the second processor may be a management processor operating in standby…
