A method, apparatus and computer program product for providing Virtual Routing and Forwarding (VRF) and gateway Media Access Controller (MAC) distribution is presented. At least one subnet associated with a Layer 2 Virtual Switching Network (L2VSN) is provided on a network device. A message is propagated to a distributed Datapath. Network devices install the message as a routable MAC address on the L2VSN for the Layer 3 Virtual Switching Network/Virtual Routing and Forwarding (L3VSN/VRF) associated with the message. Edge devices route packets on the L2VSN addressed to the gateway MAC address.

According to an example, in a method for redirecting virtual machine traffic a virtual switch may be implemented in a physical server. In addition, a packet sent from a first virtual machine to a second virtual machine may be detected, in which the first virtual machine and the second virtual machine are in the same virtual local area network (VLAN), and in which the packet has a first VLAN label that identifies the VLAN. Moreover, the first VLAN label may be replaced with a second VLAN label in the packet, in which the second VLAN label differs from the first VLAN label, and the packet may be sent to an uplink switch, in which the uplink switch may send the packet to a network security module.

Multiple TCP/IP stack processors on a host. The multiple TCP/IP stack processors are provided independently of TCP/IP stack processors implemented by virtual machines on the host. The TCP/IP stack processors provide multiple different default gateway addresses for use with multiple processes. The default gateway addresses allow a service to communicate across an L3 network. Processes outside of virtual machines that utilize the TCP/IP stack processor on a first host can benefit from using their own gateway, and communicate with their peer process on a second host, regardless of whether the second host is located within the same subnet or a different subnet. The multiple TCP/IP stack processors can use separately allocated resources. Separate TCP/IP stack processors can be provided for each of multiple tenants on the host. Separate loopback interfaces of multiple TCP/IP stack processors can be used to create separate containment for separate sets of processes on a host.

A port number extension method and a switch are provided. A first switch determines bits for identifying the first switch in a Media Access Control (MAC) address in an identifier (ID) of a specified bridge; calculates a bit for port number extension according to the bits for identifying the first switch; and combines the bit for port number extension and original bits for specifying a port, to obtain new bits for specifying a port. In this way, a problem that Spanning Tree Protocol (STP) port numbers are insufficient in a super virtual fabric with a massive quantity of ports is resolved.

A system and method can support packet switching in a network environment. The system can include an ingress buffer on a networking device, wherein the ingress buffer, which includes one or more virtual output queues, operate to store one or more incoming packets that are received at an input port on the networking device. Furthermore, the system can include a packet flush engine, which is associated with the ingress buffer, wherein said packet flush engine operates to flush a packet that is stored in a said virtual output queue in the ingress buffer, and notify one or more output schedulers that the packet is flushed, wherein each output scheduler is associated with an output port.

A method for obtaining a port path and an apparatus to improve a network capacity, where the method includes receiving, by a controller, a request message from a first server, where the request message requests port path information, and the port path information includes a port that a logical link from the first server to a second server passes through, obtaining, by the controller, a first absolute port path (APP) and a second APP according to network topology information, where the first APP includes a port that a logical link from a root node to the first server passes through, and the second APP includes a port that a logical link from the root node to the second server passes through, obtaining, by the controller, the port path information according to the first APP and the second APP, and sending the port path information to the first server.

A data center rack includes a housing, at least one wireless access point (AP) mounted within the housing and wirelessly connectable to a network switch external to the housing, and at least one tray including a plurality of mobile device power connections to provide power to a plurality of mobile devices.

Techniques for managing operation in cloud computing systems are disclosed herein. In one embodiment, a method can include receiving data representing a guaranteed value of a performance metric of a cloud service and an error budget and deriving a switching threshold based on a combination of the value of the performance metric and the error budget. The method also includes determining a current value of the performance metric of the cloud service and causing the cloud computing system to selectively switch between operational modes for providing the cloud service based on a comparison between the determined current value of the performance metric and the switching threshold.

Aspects of oversubscription monitoring are described. In one embodiment, oversubscription monitoring includes accumulating an amount of data that arrives at a network component over at least one epoch of time. Further, a core processing rate at which data can be processed by the network component is calculated. Based on the amount of data and the core processing rate, it is determined whether the network component is operating in an oversubscribed region of operation. In one embodiment, when the network component is operating in the oversubscribed region of operation, certain quality of service metrics are monitored. Using the monitored metrics, a network operation display object may be generated for identifying or troubleshooting network errors during an oversubscribed region of operation of the network component.

A system provisions global logical entities that facilitate the operation of logical networks that span two or more datacenters. These global logical entities include global logical switches that provide L2 switching as well as global routers that provide L3 routing among network nodes in multiple datacenters. The global logical entities operate along side local logical entities that are for operating logical networks that are local within a datacenter.