Date: Sat, 27 Dec 2003 07:54:39 +0300 (MSK) From: "."@babolo.ru To: Stephane Raimbault <segr@hotmail.com> Cc: net@freebsd.org Subject: Re: VLAN MTU problem in 4.9 ? Message-ID: <1072500879.937521.13344.nullmailer@cicuta.babolo.ru> In-Reply-To: <Law10-F82B6Uw54USi00005e59b@hotmail.com>
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> Hi, > > I have the following setup on a freebsd box acting as a router for multiple > LAN's. > > xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 10.0.0.3 netmask 0xffffffc0 broadcast 10.0.0.63 > inet6 fe80::260:97ff:fe07:5f4b%xl0 prefixlen 64 scopeid 0x1 > ether 00:60:97:07:5f:4b > media: Ethernet autoselect (100baseTX <full-duplex>) > status: active > xl1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 207.176.232.142 netmask 0xffffffe0 broadcast 207.176.232.159 > inet6 fe80::2c0:4fff:fe9e:b9c7%xl1 prefixlen 64 scopeid 0x2 > ether 00:c0:4f:9e:b9:c7 > media: Ethernet autoselect (100baseTX <full-duplex>) > status: active > vlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 10.0.1.3 netmask 0xffffffe0 broadcast 10.0.1.31 > inet6 fe80::260:97ff:fe07:5f4b%vlan0 prefixlen 64 scopeid 0x4 > ether 00:c0:4f:9e:b9:c7 > media: Ethernet autoselect (100baseTX <full-duplex>) > status: active > vlan: 3 parent interface: xl1 > vlan1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 10.0.11.3 netmask 0xffffffe0 broadcast 10.0.11.31 > inet6 fe80::260:97ff:fe07:5f4b%vlan1 prefixlen 64 scopeid 0x5 > ether 00:c0:4f:9e:b9:c7 > media: Ethernet autoselect (100baseTX <full-duplex>) > status: active > vlan: 4 parent interface: xl1 > > > The setup is physically connected like this > > Switch 1 <---> (xl0) FreeBSD (xl1) <---> Switch 2 > > My Workstation is connected to Switch 1 on the ip network 10.0.0.0/26 > The Server(s) I'm connecting to are on Switch 2 on the ip network > 10.0.11.0/27 and/or 10.0.1.0/27 > > I seem to have some problems connecting to the above mentioned servers on > vlan0 and vlan1. My SSH session seems to freeze when I type a command that > will output quite a bit of data (top, etc...) I also seem to have some > other large data problems between the servers communicating to each other > over the VLAN's. > > I had a working setup, but since I upgraded from 4.9-RC2 on the FreeBSD > router to 4.9-RELEASE-p1 I've been having the above described problem. I'm > wondering if I left something out in my KERNEL configuration when I upgraded > or if I've stumbled onto a bug in 4.9-R ? ifconfig vlan0 mtu 1496 ifconfig vlan1 mtu 1496 will restore old behavior. But I do not know when default mtu for vlan was changed.
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