Date: Fri, 4 Jan 2002 11:08:06 +0100 From: Martin Kaeske <Martin.Kaeske@II.Stud.TU-Ilmenau.DE> To: freebsd-hackers@freebsd.org Subject: path_mtu_discovery Message-ID: <20020104110806.A2138@walnut.hh59.local>
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Hello, I'm using FreeBSD-4.4-STABLE and have an OpenBSD-2.9 router to connect to the internet (via DSL). If i try to do a cvsup (cvsup.de.freebsd.org, cvsup2.de.freebsd.org, cvsup.freebsd.org) i'm getting a lot of "icmp: Destination unreachable, need to frag <mtu 1488>" messages and cvsup fails (timeout). The curious thing is if i disable net.inet.tcp.path_mtu_discovery or if i lower the MTU to 1488, everything is fine (of course). That's why i wanted to ask wether FreeBSD fails to lower the MTU (it should lower it due to the icmp messages, shouldn't it?) or is there any pppoe specific problem between me and the cvsup servers? Martin PS: AFAICS cvsup is the only problem ftp/http/nntp works fine -- The instructions said to use Windows 98 or better, so I installed FreeBSD. -- Jim Levie in comp.unix.bsd.freebsd.misc -- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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