Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
cancel

The Cisco Catalyst switch does not communicate with the 3Com switch

Core issue

When this issue occurs, the port LED does not light up. The status of the interface is down/down.

Resolution

To fix this issue, try these steps:

  • Set the speed and duplex to AUTO.
  • Enable the Auto-Medium-dependent Interface Crossover (MDIX) feature.

When this feature is enabled, the switch detects the required cable type for copper Ethernet connections and configures the interfaces accordingly. Therefore, either a crossover or a straight-through cable can be used for connections to a copper 10/100/1000 or 1000BASE-T SFP module port on the switch, regardless of the type of device on the other end of the connection. The Auto-MDIX feature is enabled by default on switches running Cisco IOS  Release 12.2(18)SE or later. For releases between Cisco IOS Release 12.1(14)EA1 and 12.2(18)SE, the Auto-MDIX feature is disabled by default.

1092
Views
0
Helpful
0
Comments