no carrier

[kunchanl]

Hi all,

I'm trying to collect some trace on a campus network. However,
I've been experiencing something strange and couldn't
figure out what is the problem. I'm wondering if
any of you can shed me some light.

Here is the story: The network admin has mirrored the traffic
on one of the unused ports on the switch for me.
But after I connected
the port on the switch to my network interface card with
a fiber cable, I only saw the LED light (RX/TX) on the
switch port flashing, but not theh LED light (LINK/DATA)
on my interface card. I also didn't see the light come
out from the other end of cable, which I was told
I supposedly to see.

Here is the output of my ifconfig

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 10.0.0.1 netmask 0xfffff000 broadcast 10.0.15.255
	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

I'm sure my network card is working fine because
I've used it before to collect other traffic.
The network admin also told me there is nothing wrong
with mirroring because he keeps seeing packet
counts for that particular port increasing.

the OS I'm running is FreeBSD 5.0
the network card is Netgear GA620
the switch is CABLETRON smartswitch 6000
I'm using  a MTRJ-SC fiber optic cable like this one

http://store.yahoo.com/fiberopticcables/mmdup625-mtsc.html

to connect the switch port and my network card.
The switch side is connected with MTRJ connector and
the PC side is connected with a pair of SC connectors.

Thanks
Kun-chan