公开(公告)号：EP0854608B1

公开(公告)日：2004-12-29

申请号：EP97310676.8

申请日：1997-12-30

Applicant: Compaq Computer Corporation

Inventor： Mayer, Dale J. ,  Richter, Roger ,  Witkowski, Michael L. ,  Kotzur, Gary B. ,  Hareski, Patricia E. ,  Walker, William J.

IPC: H04L12/28

CPC classification number: H04L49/103 ,  H04L49/201 ,  H04L49/205 ,  H04L49/254 ,  H04L49/351

公开(公告)号：EP0854608A3

公开(公告)日：1999-06-16

申请号：EP97310676.8

申请日：1997-12-30

Applicant: Compaq Computer Corporation

Inventor： Mayer, Dale J. ,  Richter, Roger ,  Witkowski, Michael L. ,  Kotzur, Gary B. ,  Hareski, Patricia E. ,  Walker, William J.

IPC: H04L12/28

CPC classification number: H04L49/103 ,  H04L49/201 ,  H04L49/205 ,  H04L49/254 ,  H04L49/351

Abstract: A network switch including a central memory that stores device identification information, port numbers, control information, and packet data received at the ports of the switch. The memory includes a packet section that stores packet data and a device identification section that stores identification entries, where each entry corresponds to a network device coupled to a port of the switch. The switch includes a switch manager to control data flow between the ports and the central memory. Each of the identification entries includes a unique network address to identify one of the network devices and a port number to identify one of the network ports. Each of the identification entries is located within the central memory at a hash address derived by hashing the unique network address. Hash logic receives and hashes each network address to determine a hash address, which is used to access the identification entries. The memory is organized into a chain structure to enable quick access of entries. The switch manager further includes a control memory for storing control registers, including a freepool control register for identifying a freepool chain of memory sectors, a receive control register for identifying a corresponding receive sector chain and a transmit control register for identifying a corresponding transmit packet chain for each of the ports.

公开(公告)号：EP0854608A2

公开(公告)日：1998-07-22

申请号：EP97310676.8

申请日：1997-12-30

Applicant: Compaq Computer Corporation

Inventor： Mayer, Dale J. ,  Richter, Roger ,  Witkowski, Michael L. ,  Kotzur, Gary B. ,  Hareski, Patricia E. ,  Walker, William J.

IPC: H04L12/28

CPC classification number: H04L49/103 ,  H04L49/201 ,  H04L49/205 ,  H04L49/254 ,  H04L49/351

Abstract: A network switch including a central memory that stores device identification information, port numbers, control information, and packet data received at the ports of the switch. The memory includes a packet section that stores packet data and a device identification section that stores identification entries, where each entry corresponds to a network device coupled to a port of the switch. The switch includes a switch manager to control data flow between the ports and the central memory. Each of the identification entries includes a unique network address to identify one of the network devices and a port number to identify one of the network ports. Each of the identification entries is located within the central memory at a hash address derived by hashing the unique network address. Hash logic receives and hashes each network address to determine a hash address, which is used to access the identification entries. The memory is organized into a chain structure to enable quick access of entries. The switch manager further includes a control memory for storing control registers, including a freepool control register for identifying a freepool chain of memory sectors, a receive control register for identifying a corresponding receive sector chain and a transmit control register for identifying a corresponding transmit packet chain for each of the ports.

Abstract translation: 一种网络交换机，包括存储在交换机的端口处接收的设备标识信息，端口号，控制信息和分组数据的中央存储器。 存储器包括存储分组数据的分组部分和存储标识条目的设备标识部分，其中每个条目对应于耦合到交换机的端口的网络设备。 交换机包括一个交换机管理器来控制端口和中央存储器之间的数据流。 每个标识条目包括唯一的网络地址以识别网络设备之一和用于识别其中一个网络端口的端口号。 每个识别条目位于中央存储器内的哈希地址处，通过散列唯一的网络地址而导出。 散列逻辑接收和散列每个网络地址以确定用于访问标识条目的散列地址。 存储器被组织成链结构以便能够快速访问条目。 开关管理器还包括用于存储控制寄存器的控制存储器，包括用于识别存储器扇区的freepool链的freepool控制寄存器，用于识别对应的接收扇区链的接收控制寄存器和用于识别对应的发送分组链的发送控制寄存器 为每个端口。