发明名称 |
Packet relaying apparatus and method and circuit thereof |
摘要 |
<p>In a high speed multicast route searching method of searching information of a transmission port to which a received multicast packet is next transferred: a route address is formed by coupling a receiver address and a sender address in this order; one p-th power-of-2-branch tree node is configured by a collection of one two-branch tree node and two-branch tree nodes of p-1 stages totalling ((p-th power of 2) - 1) nodes just under the one two-branch tree node to form a p-th power-of-2-branch tree which is stored in a memory (300); not one bit but consecutive p bits of the route address coupling the receiver address and sender address in a received multicast packet in this order are checked at the same time; and in accordance with the values of the consecutive bits, a search tree stored in the memory (300) is searched. In this manner, a search process can be completed by tracing nodes (the number of bits of a search key divided by p) times at a maximum, independently from the number of entries. <IMAGE></p> |
申请公布号 |
EP0993144(A2) |
申请公布日期 |
2000.04.12 |
申请号 |
EP19990117151 |
申请日期 |
1999.08.31 |
申请人 |
HITACHI, LTD. |
发明人 |
AKAHANE, SHINICHI;SUGAI, KAZUO;AIMOTO, TAKESHI;MATSUYAMA, NOBUHITO;SAKO, YOSHIHITO;SEKINO, HIROSHI |
分类号 |
G06F13/00;H04L12/18;H04L12/46;H04L12/70;H04L12/771;H04L12/931;H04L13/08;(IPC1-7):H04L12/18;H04L29/12;H04L12/56 |
主分类号 |
G06F13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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