Date: Wed, 15 Dec 2010 18:51:22 +0100 From: Sascha Holzleiter <mlists+freebsd-net@daemonground.de> To: freebsd-net@freebsd.org Subject: Forcing Full-Duplex on Realtek card Message-ID: <201012151851.22611.mlists%2Bfreebsd-net@daemonground.de>
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Hello,
i just discovered it seems to be impossible to force a duplex setting if the
switchport is not doing autonegotiation.
The server in question has a Realtek 1GBit device but the hosting company
reduces the speed on their switches to 100MBit. So after booting without
any options this gives me:
re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=389b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_UCAST,WOL_MCAST,WOL_MAGIC>
ether XX:XX:XX:XX:XX:XX
inet 46.X.X.X netmask 0xffffffc0 broadcast 46.X.X.X
media: Ethernet 100baseTX <half-duplex>
status: active
I though this wasn't a big deal and tried to force it to full-duplex:
# ifconfig re0 media 100baseTX mediaopt full-duplex
but it seems the actual setting is still half-duplex:
re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=389b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_UCAST,WOL_MCAST,WOL_MAGIC>
ether XX:XX:XX:XX:XX:XX
inet 46.X.X.X netmask 0xffffffc0 broadcast 46.X.X.X
media: Ethernet 100baseTX <full-duplex> (100baseTX <half-duplex>)
status: active
This is on a FreeBSD 8.1-RELEASE amd64 system and the hardware in questions
is:
re0@pci0:6:0:0: class=0x020000 card=0x75221462 chip=0x816810ec rev=0x02
hdr=0x00
vendor = 'Realtek Semiconductor'
device = 'Gigabit Ethernet NIC(NDIS 6.0) (RTL8168/8111/8111c)'
class = network
subclass = ethernet
Is there anything i can do to force the full-duplex setting for good?
Regards,
Sascha
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