发明名称 |
Acquiring addresses in an input/output system |
摘要 |
In a computer I/O system including a plurality of link-level facilities and a dynamic switch having a plurality of ports, each link-level facility being attached to an individual one of the ports, a mechanism and method for assigning a unique link level address to each of the link-level facilities. As each of the link-level facilities comes on line, it sends an acquire link address (ALA) frame and waits for a response (ACK) frame. The ALA frame may be addressed to a general to-whom-it-may-concern address and have a source address of who-am-I. Only a dynamic switch normally assigns link addresses. When receiving an ALA frame, the dynamic switch returns an ACK frame having a unique link address assigned to the sender of the ALA frame. Provision is made for determining if there is a dynamic switch present, or, if the link-level facilities are connected together by a static connection through the dynamic switch, for the link-level facility of a channel to assign the unique link addresses.
|
申请公布号 |
US5276813(A) |
申请公布日期 |
1994.01.04 |
申请号 |
US19900576557 |
申请日期 |
1990.08.31 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORP. |
发明人 |
ELLIOTT, JOSEPH C.;HEFFERON, EUGENE P.;MERITT, ALLAN S.;SACHS, MARTIN W.;SNEDAKER, MARK C. |
分类号 |
G06F13/00;G06F12/06;G06F13/14;G06F13/40;G06F13/42;G06F15/173;H04L29/12;(IPC1-7):G06F13/00 |
主分类号 |
G06F13/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|