Global server load balancing
Granted: September 20, 2011
Patent Number:
8024441
A global server load-balancing (GSLB) switch serves as a proxy to an authoritative DNS and communicates with numerous site switches that are coupled to host servers serving specific applications. The GSLB switch receives from site switches operational information regarding host servers within the site switches neighborhood. When a client program requests a resolution of a host name, the GSLB switch, acting as a proxy of an authoritative DNS, returns one or more ordered IP addresses for…
Inter-fabric routing
Granted: September 13, 2011
Patent Number:
8018936
A method and apparatus is shown for communicating Fibre Channel frames between distinct fabrics. A proxy zone is established in each fabric with a physically present local device and a remote fabric device. A router creates a proxy device in each fabric for every device not physically connected to the fabric. The proxy devices appear to be directly attached to the router. The router handles all address translations between proxy and physical addresses. When multiple routers are…
Method and apparatus for displaying network fabric data
Granted: September 13, 2011
Patent Number:
8019806
The invention relates to graphical user interfaces for managing electronic networks, such computer networks, storage area networks (SANs), and the like. Specifically, the invention provides a simplified means of managing large numbers of parameters associated with devices in such networks. In a preferred embodiment, the invention provides a method of displaying devices forming a network. In a first step, a computer system associated with a graphical user interface queries the network to…
System and method for providing network route redundancy across layer 2 devices
Granted: September 6, 2011
Patent Number:
8014301
Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy…
Method and apparatus for transparent communication between a fibre channel network and an Infiniband network
Granted: August 30, 2011
Patent Number:
8009693
A system and method for providing transparent communications between an Infiniband (IB) network and a Fibre Channel (FC) network are disclosed. One method comprises: (a) detecting FC node ports in the FC network; (b) creating virtual IB targets for each FC node port in the FC network; and (c) converting IB packets directed to the virtual IB targets into FC frames directed to the corresponding FC node port. It may further comprise intercepting management packets directed to the virtual IB…
Use of server instances and processing elements to define a server
Granted: August 30, 2011
Patent Number:
8010513
A server instance, which is a collection of LUNs, containing an operating system, any applications and data storage. A processing element is the physical hardware. The combination is a server as normally understood. Templates are used to define server instances and server types to simplify deploying a server instance to a processing element. A graphical user interface provides the templates where the particular storage groups are identified and then server instances are created from…
Source-based congestion detection and control
Granted: July 12, 2011
Patent Number:
7978607
Congestion control techniques based upon resource utilization information stored by a network device. According to an embodiment of the present invention, a network device is configured to identify a data source causing congestion based upon information stored by the network device identifying a set of data sources, and for each data source, information identifying the amount of a resource of the network device being used for processing data received by the network device from the data…
Method and device for managing cluster membership by use of storage area network fabric
Granted: July 5, 2011
Patent Number:
7975006
Managing cluster membership and providing and managing locks in the switches forming the interconnecting network. To manage the cluster membership, a zone is created, with indicated members existing in the zone and the zone being managed by the switches. The nodes communicate their membership events, such as alive messages, using an API to work with the switch to which they are attached. The desired membership algorithm is executed by the switches, preferably in a distributed manner.…
Frame traffic balancing across trunk groups
Granted: May 24, 2011
Patent Number:
7948895
Embodiments of methods, apparatuses and systems for balancing flow across trunk groups are disclosed. For example, a method of routing a flow of frames may include applying a correspondence between logical ports and physical ports of a switch. Other examples may include receiving at least one frame; selecting an exit port of a switch for the one frame to exit, based at least in part, on balancing flow across trunk groups; and transmitting the at least one frame.
Host-level policies for global server load balancing
Granted: May 24, 2011
Patent Number:
7949757
In a network, a user can configure host-level policies usable for load balancing traffic to servers of a domain. A global server load balancing (GSLB) switch provides load balancing to the servers, and is configured with the GSLB host-level policies. Users can define a host-level policy (alternatively or additionally to a globally applied GSLB policy) and apply the host-level policy to hosts in domains configured on the GSLB switch. Thus, the user can enable different policies for…
Multifabric zone device import and export
Granted: May 3, 2011
Patent Number:
7936769
A Fibre Channel router used to join fabrics. EX_ports are used to connect to the fabrics. The EX_port joins the fabric but the router will not merge into the fabric. Ports in the Fibre Channel router can be in a fabric, but other ports can be connected to other fabrics. Fibre Channel routers can be interconnected using a backbone fabric. Global, interfabric and encapsulation headers are developed to allow routing by conventional Fibre Channel switch devices in the backbone fabric and…
Cookie invalidation or expiration by a switch
Granted: April 12, 2011
Patent Number:
7925789
A switch may be used to force the expiration of a cookie on a user's system by inserting an expiration field into the cookie contained in a network response packet. Additionally, a mechanism is provided to delete or damage a cookie contained in a network request packet, so that server software is not disrupted by the receipt of a cookie. Deleting a cookie results in a cleaner request, but damaging a cookie may be more efficient in certain circumstances. By providing these features, an…
Automatic adjustment of logical channels in a fibre channel network
Granted: March 29, 2011
Patent Number:
7916647
One embodiment of the present invention provides a system that facilitates automatic adjustment of logical channels in a Fiber Channel (FC) network. During operation, the system receives FC data frames. A respective data frame is associated with a logical channel. The bandwidth on an FC link can be allocated into a plurality of logical channels, and a respective logical channel is associated with a dedicated buffer and can transport a plurality of data flows with data frames of variable…
Management of multiple network devices using unsigned java applets
Granted: March 8, 2011
Patent Number:
7904911
Remote management of a plurality of network devices is described wherein each device is managed with its own unsigned Java™ applet. Unsigned applets launched from different devices operate within the same shared environment of a webpage. Furthermore, a transmitting applet communicates with a recipient applet. In one embodiment, the recipient applet is a central management applet that combines data from 10 a plurality of devices into one data pool, which can then be used to provide…
Smoothing algorithm for round trip time (RTT) measurements
Granted: February 8, 2011
Patent Number:
7885188
A smoothing algorithm for round trip time (RTT) measurements is provided to a network device to effectively deal with variations or other potential anomalies that may occur in RTT measurements. The algorithm involves: first determining what should be considered a very high or a very small value for a RTT sample. If a new RTT sample is in an acceptable range, then the network device performs a relatively basic smoothing. If the new RTT sample is much higher than a current RTT value, then…
Cookie invalidation or expiration by a switch
Granted: January 25, 2011
Patent Number:
7877491
A switch may be used to force the expiration of a cookie on a user's system by inserting an expiration field into the cookie contained in a network response packet. Additionally, a mechanism is provided to delete or damage a cookie contained in a network request packet, so that server software is not disrupted by the receipt of a cookie. Deleting a cookie results in a cleaner request, but damaging a cookie may be more efficient in certain circumstances. By providing these features, an…
Isolation switch for fibre channel fabrics in storage area networks
Granted: January 25, 2011
Patent Number:
7877512
An isolation switch blade Fiber Channel switch presents F_ports to form a first Fiber Channel fabric and N_ports to a second Fiber Channel fabric to appear as node devices. The isolation switch blade may be used to connect a plurality of blade servers to a Fiber Channel fabric. Fabric events engendered by the insertion or removal of hot-pluggable devices are handled by the isolation switch blade and “event storms” on the Fiber Channel fabric are avoided. The isolation switch blade…
Network security through configuration servers in the fabric environment
Granted: January 18, 2011
Patent Number:
7873984
A network configuration device or entity has control of defined management and security functions in the network, or in many embodiments, in a Fiber Channel fabric. The network configuration device may control many functions. Foremost, it may control the recognition, operation and succession procedure for network configuration entities. It may also control user configurable options for the network, rules for interaction between other entities in the network, rules governing…
Fibre channel fabric snapshot server
Granted: January 4, 2011
Patent Number:
7865627
The snapshot capability moving into the SAN fabric and being provided as a snapshot service. A well-known address is utilized to receive snapshot commands. Each switch in the fabric connected to a host contains a front end or service interface to receive the snapshot command. Each switch of the fabric connected to a storage device used in the snapshot process contains a write interceptor module which cooperates with hardware in the switch to capture any write operations which would occur…
Host-level policies for global server load balancing
Granted: November 23, 2010
Patent Number:
7840678
In a network, a user can configure host-level policies usable for load balancing traffic to servers of a domain. A global server load balancing (GSLB) switch provides load balancing to the servers, and is configured with the GSLB host-level policies. Users can define a host-level policy (alternatively or additionally to a globally applied GSLB policy) and apply the host-level policy to hosts in domains configured on the GSLB switch. Thus, the user can enable different policies for…
