set gigabit card to lower speed on FreeBSD

[kunchanl]

Hi all,

Do any of you know how I can force my Netgear GA620
gigabit ethernet card
to run at lower speed (eg. 100BT) on freebsd

from ifconfig, it seems I can only set the
card in 1000baseSX mode

vin# ifconfig -m ti0
ti0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=13<RXCSUM,TXCSUM,VLAN_HWTAGGING>
        capability list:
                =13<RXCSUM,TXCSUM,VLAN_HWTAGGING>
        inet6 fe80::2a0:ccff:fe73:3523%ti0 prefixlen 64 scopeid 0x4
        inet 192.168.0.1 netmask 0xfffff000 broadcast 192.168.15.255
        ether 00:a0:cc:73:35:23
        media: Ethernet 1000baseSX <full-duplex> (autoselect)
        status: no carrier
        supported media:
                media autoselect
                media 1000baseSX mediaopt full-duplex
                media 1000baseSX


Thanks
Kun-chan