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 :|
As a data point, my BCM5702 (Dell D600) works fine: # ifconfig -a bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 9000 options=1b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING> inet6 fe80::20b:dbff:fea3:f9a1%bge0 prefixlen 64 scopeid 0x1 inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255 ether 00:0b:db:a3:f9:a1 media: Ethernet autoselect (none) status: no carrier
Eric
-- ------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Today is the tomorrow you worried about yesterday. ------------------------------------------------------------------
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