Date: Wed, 8 Mar 2000 20:49:35 +0100 From: Ignatios Souvatzis <is@jocelyn.rhein.de> To: David Wetzel <dave@turbocat.de> Cc: freebsd-isdn@FreeBSD.ORG Subject: Re: sPPP and PPP keepalives Message-ID: <20000308204935.C441@jocelyn.rhein.de> In-Reply-To: <200003081721.SAA01586@cat.turbocat.de>; from David Wetzel on Wed, Mar 08, 2000 at 06:21:21PM %2B0100 References: <200003081414.PAA00487@peedub.muc.de> <200003081721.SAA01586@cat.turbocat.de>
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On Wed, Mar 08, 2000 at 06:21:21PM +0100, David Wetzel wrote: > Would someone please explain what keepalives are? Artificial traffic that is > created by one end of the isdn link? the PPP link control protocol has two message types called "LCP echo" and "LCP echo reply", which do what you guess. Linux people started to use them to workaround buggy serial drivers that dont provide SIGHUP on hangup some years ago. They usually send a LCP echo every couple of seconds, and tear the connection down if they dont receive two or three of the replies in a row. Regards, -is To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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