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+Network Working Group                                    D. Walden
+RFC # 548                                                BBN-NET
+NIC # 17794                                              August 16, 1973
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+                 Hosts Using the IMP Going Down Message
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+    As given in BBN Report 1822 (Specifications for the Interconnection
+of a Host and an IMP), IMP to Host message type 2 specifies that the IMP
+local to the Host is going down; the message further says when the IMP
+is going down, for how long, and why.
+
+    When the IMP goes down after sending the IMP Going Down message to
+the Host, the Host's network users and local users of the network will
+not, in general, be forewarned unless the Host sends a message to these
+users.  We therefore urge all Hosts to warn their network users and
+users of the network of impending IMP downs; just logging the received
+IMP Going Down message on a logging teletype, as many Hosts currently
+do, seems insufficient.
+
+    Incidentally, please remember that Tuesday mornings from 7 a.m. to 9
+a.m.  (Eastern Time) are reserved for Network Software Maintenance, as
+announced in RFC #440.
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+       [ 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 ]
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+Walden                                                          [Page 1]
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