Date: Sat, 2 Feb 2002 14:14:20 +0200 From: Alexey Luckyanchikov <alexl@alkar.net> To: cjclark@alum.mit.edu Cc: freebsd-stable@FreeBSD.ORG, freebsd-net@FreeBSD.ORG Subject: Re: Weird path MTU autodiscovery problem in 4.5-RELEASE Message-ID: <20020202121420.GA30077@alkar.net> In-Reply-To: <20020201094702.P152@gohan.cjclark.org> References: <20020201125326.GA3036@alkar.net> <20020201094702.P152@gohan.cjclark.org>
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On Fri, 01 Feb 2002, Crist J. Clark wrote: CJC> On Fri, Feb 01, 2002 at 02:53:26PM +0200, Alexey Luckyanchikov wrote: CJC> > Hello, CJC> > CJC> > I have such network topology: CJC> > CJC> > +--------+ +--------+ +--------+ CJC> > | Server |<---- MTU 1500 ---->| Router |<---- MTU 1476 ---->| Client | CJC> > +--------+ +--------+ +--------+ CJC> CJC> [snip] CJC> CJC> > 14:06:48.682558 router > server: icmp: client unreachable - need to frag (mtu 1476) for server.7 > client.1371: [|tcp] (DF) (ttl 61, id 25428, len 1500) (ttl 253, id 2491, len 56) CJC> > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ CJC> > Router say to server that he must to decrease packet size CJC> CJC> Is "router" the same IP address that "server" has as the route to CJC> "client?" That is, there aren't any aliases on "router's" interface CJC> with "server" making problems? "router" have not any aliases on it's interfaces. Seems like problem is in FreeBSD 4.5-RELESE. "Server" with installed 4.4-RELEASE worked without any problems. -- Sincerely, e-mail: alexl@alkar.net Alexey Luckyanchikov To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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