Method and apparatus for determining a communications path between two
nodes in an Internet Protocol (IP) network
    1.
    发明授权
    Method and apparatus for determining a communications path between two nodes in an Internet Protocol (IP) network 失效
    用于确定因特网协议(IP)网络中的两个节点之间的通信路径的方法和装置

    公开(公告)号:US5675741A

    公开(公告)日:1997-10-07

    申请号:US328513

    申请日:1994-10-25

    IPC分类号: H04L12/56 G06F13/00

    CPC分类号: H04L45/04 H04L45/20 H04L45/26

    摘要: Method and apparatus for determining a communications path between a source and a destination in an Internet Protocol (IP) network. The method determines a path list of next-hop routers between the source and destination by selecting between a Simple Network Management Protocol (SNMP) query of a current router on the path, and by sending a User Datagram Protocol (UDP) probe packet having a destination field with a destination IP address and a Time-to-Live (TTL) field with a value of one greater than the number of hops to the current router. The steps are iterated until the next router is determined to be the destination. Preferably, the UDP probe packets are loose-source routed through the source. In addition, a topology information database may be accessed to resolve an unknown router, and/or resolve intrarouter devices on the path.

    摘要翻译: 用于确定因特网协议(IP)网络中的源和目的地之间的通信路径的方法和装置。 该方法通过在路径上的当前路由器的简单网络管理协议(SNMP)查询之间选择并通过发送具有以下的用户数据报协议(UDP)探测分组来确定源和目的地之间的下一跳路由器的路径列表: 目的地字段,其目的地IP地址和生存时间(TTL)字段的值大于当前路由器的跳数。 重复这些步骤,直到下一个路由器被确定为目的地。 优选地,UDP探测分组是通过源的松散源路由。 此外,可以访问拓扑信息数据库以解决未知路由器,和/或解决路径上的路由器内设备。