Hi.

I am having issue with a Firewall attached to our Telco router.

I have been told by the Telco (and had confirmed) that their customer facing interface is force set to 100MB/FULL DUPLEX.

However no matter what I set on the ASA (Auto/Auto or 100/FULL) I still see 100MB/HALF DUPLEX on the show interface command on the ASA. I am also seeing some minor collisions.

Please can someone advise on exactly what the show interface command in this case means; in particular what the bracketed (Half-duplex) refers to???

For information purposes the connection remains active with either setting.

Interface GigabitEthernet0/0 "outside", is up, line protocol is up

Hardware is i82546GB rev03, BW 1000 Mbps, DLY 10 usec

Full-duplex(Half-duplex), 100 Mbps(100 Mbps)

MAC address xxxx.xxxx.xxxx, MTU 1500

IP address xxx.xxx.xxx.xxx, subnet mask 255.255.255.224

954673 packets input, 1117595545 bytes, 0 no buffer

Received 20504 broadcasts, 0 runts, 0 giants

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

1 L2 decode drops

681592 packets output, 256981629 bytes, 0 underruns

0 output errors, 370 collisions, 13 interface resets

379 late collisions, 7333 deferred

0 input reset drops, 0 output reset drops

input queue (curr/max packets): hardware (0/14) software (0/0)

output queue (curr/max packets): hardware (0/15) software (0/0)