On Fri, Mar 11, 2005 at 05:31:00PM +0000, prlw1@cam.ac.uk wrote:
> bge0 at pci2 dev 0 function 0: Broadcom BCM5751 Gigabit Ethernet
> bge0: interrupting at irq 11
> bge0: ASIC BCM5750 A1 (0x4001), Ethernet address 00:11:43:7c:6c:3a
> brgphy0 at bge0 phy 1: BCM5750 1000BASE-T media interface, rev. 0
> brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
> 
> Plug it into a vlan capable switch (eg 3com 3300xm), with the port set to
> just passing the default vlan (1), untagged.
> 
> ifconfig bge0 up inet a.b.c.d netmask 0xffffff00
> 
> (I also happened to also enable h/w checksumming, but that doesn't
> seem to change anything)
> and autoneg seems to work:
> media: Ethernet autoselect (100baseTX full-duplex,flowcontrol,rxpause,txpause)
> 
> 
> scp GENERIC from somewhere at 9MB/s.
> 
> Now change the port to send through no untagged vlan, and just tagged default.
> 
> ifconfig bge0 delete inet a.b.c.d
> ifconfig vlan0 create vlan 1 vlanif bge0
> ifconfig vlan0 inet a.b.c.d netmask 0xffffff00
> 
> scp GENERIC from somewhere - password prompt all rather responsive, but then
> the transfer is so slow it stalls and finally gives up.

Could be a MTU problem. What does 'ifconfig vlan0' show ?

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--