Date: Mon, 4 Sep 2006 23:04:31 -0400 From: Bill Vermillion <bv@wjv.com> To: Sam Wun <smw2010@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: half-duplex Message-ID: <20060905030431.GC69355@wjv.com> In-Reply-To: <ff64092b0609041918m2e8a6a74i562537f3dd35aed7@mail.gmail.com> References: <ff64092b0609041918m2e8a6a74i562537f3dd35aed7@mail.gmail.com>
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On Tue, Sep 05, 2006 at 12:18 , after knocking over a stack of dishes on the heat sink Sam Wun wondered out loud about: > Hi, > I am running a FreeBSD 5.4 stable as a network router. > I don't know any reason why one of the ethernet ports becomes half-duplex. > Here is its detail: > em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > options=b<RXCSUM,TXCSUM,VLAN_MTU> > inet 60.1.2.3 netmask 0xfffffffc broadcast 220.233.99.39 > ether 00:04:23:bc:3a:d1 > media: Ethernet autoselect (10baseT/UTP <half-duplex>) > status: active > em2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > options=b<RXCSUM,TXCSUM,VLAN_MTU> > inet 10.1.10.1 netmask 0xffffff00 broadcast 10.1.10.255 > ether 00:04:23:bc:3a:d2 > media: Ethernet autoselect (1000baseTX <full-duplex>) > status: active > This network card is a Quat Port Intel card. Is there any way > I can "reset" it to full-duplex and 1000baseT without close > down the network connection on em1? I know I can use following > command to change it: ifconfig em1 media 100baseTX mediaopt > full-duplex Well 'em1' shows it is alos 10Mg second. Autoselect >usually< works well but there can be problems with some switches. I am assuming you are using a switch and not a hub - as that won't work FDX. You should be able to set the startup in the settings in your rc.conf with the meidaopt argument. man 4 em shows that only FDX is supported at high speeds - 1000mb/sec. And you are getting only 10mb. Is that what you want. If you are connected to a switch capable of 1000mbit, check the switch settings. Cicso had release notes and indicated 6 ways things will NOT work and one way it will. > but if this not work, it will close down the entire internet > connection, which I try to avoid. I don't know if using the 'mediopt' argument will shut down the entire connection - but you probably are going to have to try. If it works from the commnand line be sure to add it to the startup script so it gets fixed on a reboot. It SHOULD work with auto-select unless you have switch and/or cabling problems. Bill -- Bill Vermillion - bv @ wjv . com
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