公开(公告)号：US09438475B1

公开(公告)日：2016-09-06

申请号：US14231901

申请日：2014-04-01

Applicant: Cisco Technology, Inc.

Inventor： Shyam Kapadia ,  Nilesh Shah ,  Sharanya Subramanian

IPC: H04L12/66 ,  H04L12/24

CPC classification number: H04L61/2015 ,  H04L61/6068 ,  H04L67/2804

Abstract: Techniques described herein provide enhanced address allocation services in a network. A switch device in communication with a host device is configured as an address relay device and receives an address request message from the host device. The switch device modifies the address request message to include a response address that uniquely identifies the switch device. The switch device adds in a field of the address request message subnetwork information that identifies a subnetwork to which the host device belongs. The switch device sends the modified address request message to an address server.

Abstract translation: 本文描述的技术提供网络中的增强地址分配服务。 与主机设备通信的交换设备被配置为地址中继设备，并从主机设备接收地址请求消息。 交换设备修改地址请求消息以包括唯一标识交换设备的响应地址。 交换设备在标识主机设备所属的子网的地址请求消息子网信息的字段中添加。 交换机将修改后的地址请求消息发送给地址服务器。

公开(公告)号：US09792106B1

公开(公告)日：2017-10-17

申请号：US14450935

申请日：2014-08-04

Applicant: Cisco Technology, Inc.

Inventor： Raja Kommula ,  Chickayya Naik ,  Naren Mididaddi ,  Francesco Meo ,  Sharanya Subramanian

IPC: G06F9/445 ,  G06F1/24 ,  G06F9/44 ,  H04L12/24

CPC classification number: G06F8/65 ,  G06F1/24 ,  G06F8/656 ,  G06F9/4406 ,  H04L41/082 ,  H04L43/10

Abstract: A network device includes a control processor and a network processor unit (NPU) to forward network packets between network ports of the device. The processor downloads a new operating system (OS). The processor performs a fast upgrade to the new OS using a fast upgrade/reload technique to isolate the processor from interruptions and, without rebooting the processor, start the new OS in place of an existing OS. The fast upgrade/reload also includes delaying a reset of the NPU so that the NPU continues to route the network packets based on existing forwarding information. The fast upgrade/reload includes resetting the NPU only when the new OS first accesses the NPU, and then programming the reset NPU.