Hi Paul,

Auto negotiation is fully supported and is switched on by default.

You can disable it using the "undo negotiation auto" command on the interface.

You can then manually specify a speed and duplex setting using the "speed xxx" and the "duplex xxx" commands.

The ports support auto negotiation of speed, duplex and mdi/mdix by default and I have never seen any negotiation issues on these switches!

You also have the "virtual-cable-test" command to test for cable problems on the link, although this is service affecting.

Have you tried connecting the switches to each other or from port to port on a switch to prove the cables and the ports come up?

Regards Nigel

Sorry, it did not work.

[sw4-c16-dc1-XGigabitEthernet0/0/3]undo negotiation
                                                    ^
Error:Incomplete command found at '^' position.
[sw4-c16-dc1-XGigabitEthernet0/0/3]undo negotiation ?
  auto  Auto negotiation

[sw4-c16-dc1-XGigabitEthernet0/0/3]undo negotiation auto
Error: This port or this mode doesn't support this command.