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Network Working Group                                    D. WaldenRFC # 548                                                BBN-NETNIC # 17794                                              August 16, 1973Hosts Using the IMP Going Down Message    As given in BBN Report 1822 (Specifications for the Interconnectionof a Host and an IMP), IMP to Host message type 2 specifies that the IMPlocal to the Host is going down; the message further says when the IMPis going down, for how long, and why.    When the IMP goes down after sending the IMP Going Down message tothe Host, the Host's network users and local users of the network willnot, in general, be forewarned unless the Host sends a message to theseusers.  We therefore urge all Hosts to warn their network users andusers of the network of impending IMP downs; just logging the receivedIMP Going Down message on a logging teletype, as many Hosts currentlydo, seems insufficient.    Incidentally, please remember that Tuesday mornings from 7 a.m. to 9a.m.  (Eastern Time) are reserved for Network Software Maintenance, asannounced in RFC #440.       [ This RFC was put into machine readable form for entry ]       [ into the online RFC archives by Alex McKenzie with    ]       [ support from GTE, formerly BBN Corp.            10/99 ]Walden                                                          [Page 1]