Re: 2.2.2-ac7 TCP ignores ICMP host unreachable ??

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 4 Mar 1999 01:38:47 +0000 (GMT)

> But my memory tells me this:
>
> - Host Unreachable should be ignored for an *existing* TCP connection
> (it is considered an transient error)
> - Host Unreachable should make a TCP connection *setup* fail

Its a heuristic some systems use. It breaks horribly on certain kinds of
ISDN dial on demand networks, and the RFC says its a temporary error

Alan

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