公开(公告)号：US07688833B2

公开(公告)日：2010-03-30

申请号：US10280177

申请日：2002-10-24

申请人： Shane J O'Neill ,  Paul Linehan ,  Mark Carson

发明人： Shane J O'Neill ,  Paul Linehan ,  Mark Carson

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04J3/16 ,  H04J3/22

CPC分类号： H04J3/1611 ,  H04J2203/0003 ,  H04J2203/0025

摘要： In order to enable nodes with a single protocol switch core to be used in a synchronous transmission network carrying both SDH and SONET traffic then one option is to convert traffic between protocols at the various network nodes. For example, if the network node has a switch core arranged for SONET, then when SDH traffic arrives at that node it can first be converted to SONET before being processed by the switch core and then converted back to SDH again if required. Known methods of converting between SONET and SDH are not suited for use at egress points of network nodes where pointer alignment processes do not occur. A new method of converting between SONET and SDH is described which overcomes these problems by reordering the position of stuff columns.

摘要翻译： 为了使具有单个协议交换机核心的节点能够在携带SDH和SONET业务的同步传输网络中使用，则一种选择是在各种网络节点之间的协议之间转换业务。 例如，如果网络节点具有为SONET安排的交换机核心，则当SDH业务到达该节点时，可以在交换机核心处理之前首先将其转换为SONET，然后如果需要，则再次转换回SDH。 在SONET和SDH之间转换的已知方法不适用于不发生指针对齐过程的网络节点的出口点。 描述了在SONET和SDH之间转换的新方法，其通过重新排列填充列的位置来克服这些问题。

公开(公告)号：US06763023B1

公开(公告)日：2004-07-13

申请号：US09544542

申请日：2000-04-06

申请人： Michael J Gleeson ,  John Hickey ,  Paul Linehan ,  Kevin Loughran

发明人： Michael J Gleeson ,  John Hickey ,  Paul Linehan ,  Kevin Loughran

IPC分类号： H04L1228

CPC分类号： H04L45/742 ,  H04L12/4625 ,  H04L49/351 ,  H04L49/602

摘要： A sub-system for forming part of a packet-data communication system for the transmission of data packets which contain media access control addresses and protocol addresses. The sub-system comprises a multiple-port network switch for forwarding data packets in response to an examination of the packets on the basis of the packets protocol addresses, and for performing said examination when a destination address in the packet corresponds to the media access control address of the switch, the switch being arranged for forwarding a packet on the basis of a media access control address therein when the destination address of the packet does not correspond to the media access control address of the switch, said switch including a forwarding database which comprises entries which relate a protocol address with a media access control address and an identification of a particular port of the switch. This switch may perform routing within a local-area network. The switch is configured so that protocol addresses may not be learned in the database in respect of the particular port. A network router, which may perform routing functions in respect of a wide-area network, is connected to the switch only by way of the particular port. The sub-system enables the switch to off-load from the router routing functions for the local-area network.

摘要翻译： 一种用于形成用于传输包含媒体访问控制地址和协议地址的数据分组的分组数据通信系统的一部分的子系统。 子系统包括多端口网络交换机，用于响应于基于分组协议地址的分组的检查来转发数据分组，并且当分组中的目的地址对应于媒体访问控制时执行所述检查 所述交换机被配置为当所述分组的目的地址不对应于所述交换机的媒体访问控制地址时，基于其中的媒体访问控制地址来转发分组，所述交换机包括转发数据库，​​所述转发数据库 包括将协议地址与媒体访问控制地址相关联的条目和交换机的特定端口的标识。 该交换机可以在局域网内执行路由。 交换机被配置为使得关于特定端口可能不在数据库中学习协议地址。 可以执行关于广域网的路由功能的网络路由器仅通过特定端口连接到交换机。 子系统使交换机能够从局域网的路由器路由功能中卸载。