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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: iSCSI: Connection replacementWhat I have on my todo list is a "restart connection" (use the X bit) to mean do first a logout and then do the login keeping all the way the same CID. Julo Pierre Labat <pierre_labat@hp.com> on 11/01/2001 04:23:20 Please respond to Pierre Labat <pierre_labat@hp.com> To: ips@ece.cmu.edu cc: Subject: iSCSI: Connection replacement Julian, Where ===== 2.10 Login command Problem ====== In the case where - the maximum number of connections/session is reached - the initiator is faster than the target to detect a failed TCP connection, the establishement of a new connection to replace the bad one will fail. The Login on the new connection will be rejected by the target because the maximum number of connections is reached and the target has not yet detected that there were a failed connection. In the event of a server adapter failure this problem will almost always happen. As soon as the harware fails, the server open a new connection using a new adapter. The target will not be fast enough to realize the connection is bad. Solution ====== a) in the Login message add a field (RecoverID) to inform the target that this connection is to replace a failed one. The value 0xffff means it is not a connection used to replace an old one. b) After the login phase, the first message sent to the target on this new connection must be a Logout for the failed connection. If not the target close the connection. Regards, Pierre
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