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1. 发明授权

US6157644A Method and apparatus for accelerating OSI layer 3 routers 失效
标题翻译：用于加速OSI第3层路由器的方法和装置
公开(公告)号：US6157644A
公开(公告)日：2000-12-05
申请号：US946431
申请日：1997-10-07
申请人： Gregory M. Bernstein , Alan Chapman , Philip Edholm , Jeffrey T. Gullicksen , Kenneth Gullicksen
发明人： Gregory M. Bernstein , Alan Chapman , Philip Edholm , Jeffrey T. Gullicksen , Kenneth Gullicksen
IPC分类号： H04L12/56 , H04L12/28
CPC分类号： H04L45/00
摘要： Methods and apparatus for accelerating a router in a communications network are described. In one embodiment, a router accelerator includes a forwarding table for associatively storing a destination address and a next hop address. If a destination address of a packet matches a destination address in the forwarding table, then logic forwards the packet to a next hop. A router may be coupled to at least one network port through the router accelerator. In another approach, the network includes at least one host and at least one router. The host has at least one routing table for associatively storing a second-level destination address, a second-level next hop address and a first-level next hop address. A router accelerator includes redirect logic for storing the second-level destination address in a second-level next hop address entry in the at least one host routing table. This causes the host to request a first-level next hop address corresponding to the second-level destination address. An accelerator table responds to the host's request with the bound first-level next hop address. In another approach employing host routing tables, a router accelerator includes request logic for requesting from the router a second-level next hop address in response to the first-level next hop address. Redirect logic stores the second-level next hop address in a second-level next hop address entry in the at least one host routing table. This causes the host to request a first-level next hop address corresponding to the second-level next hop address.
摘要翻译：描述了用于加速通信网络中的路由器的方法和装置。在一个实施例中，路由器加速器包括用于关联地存储目的地地址和下一跳地址的转发表。如果报文的目的地址与转发表中的目的地址匹配，则逻辑转发报文到下一跳。路由器可以通过路由器加速器耦合到至少一个网络端口。在另一种方法中，网络包括至少一个主机和至少一个路由器。主机具有至少一个用于关联地存储二级目的地址，二级下一跳地址和第一级下一跳地址的路由表。路由器加速器包括用于将所述第二级目的地地址存储在所述至少一个主机路由表中的第二级下一跳地址条目中的重定向逻辑。这使得主机请求与二级目的地地址对应的第一级下一跳地址。加速器表使用绑定的第一级下一跳地址来响应主机的请求。在采用主机路由表的另一种方法中，路由器加速器包括响应于第一级下一跳地址从路由器请求二级下一跳地址的请求逻辑。重定向逻辑将二级下一跳地址存储在至少一个主机路由表中的第二级下一跳地址条目中。这使得主机请求与二级下一跳地址对应的第一级下一跳地址。

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