Hi everybody,
I'm going to be trying to get gigabit throughput between my laptop (Dell
Latitude D800 running 5.2-release) and a shuttle box running FreeBSD 5.1
(not in front of me at the moment.) As part of the process, I attempted
to increase the frame size on my laptop, only to be greeted with
disappointment:
celeste# ifconfig bge0
bge0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
options=1b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING>
ether 00:0b:db:99:d6:06
media: Ethernet 1000baseTX <full-duplex> (none)
status: no carrier
celeste# ifconfig bge0 mtu 9000
ifconfig: ioctl (set mtu): Invalid argument
celeste# ifconfig bge0 mtu 1501
ifconfig: ioctl (set mtu): Invalid argument
celeste# ifconfig bge0 mtu 1500
celeste#
The C file talks about being able to do jumbo frames when the mtu is big
enough...anybody know what I'm missing? My card is a "Broadcom BCM5705M"
and I'm running FreeBSD 5.2-release. When I asked google, it mostly
pointed me at comments in if_bge.c talking about jumbo frames :|
Thanks,
Mike
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