发明名称 |
Network unit for use in a cascade system |
摘要 |
<p>A multi-port network unit for use in a cascade system of network units sends from a cascade port a packet including a special header having a source port ID, a destination port ID and a 'destination port known' field. The port IDs identify both a unit and a port within a unit. A routing database (25) is set up, optionally by a discovery protocol, in terms of ports and either destination units (within the cascade) or source units (within the cascade). The database includes a mesh table (25a), indicating from which cascade port a packet with a known destination port ID should be forwarded, without needing a fresh look-up. The database also includes a multicast exclusion table (25b) which allows ingress of packets with source unit IDs matched to an ingress port. The scheme allows a general mesh type of cascade while dynamically preventing closed loops. <IMAGE></p> |
申请公布号 |
EP1760968(B1) |
申请公布日期 |
2010.10.27 |
申请号 |
EP20060023983 |
申请日期 |
2003.01.04 |
申请人 |
3COM CORPORATION |
发明人 |
O'NEILL, EUGENE;CHOI, KAM;O'MALLEY, EDELE;GOODFELLOW, MAURICE ARTHUR |
分类号 |
H04L12/44;H04L12/46;H04L12/721;H04L12/747;H04L12/751;H04L12/931;H04L12/935 |
主分类号 |
H04L12/44 |
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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