Ports 1/2 and 2/2 are inactive with dual supervisor engines in Cisco Catalyst 4507R switches

[TCC_2]

Core issue

When dual supervisor engines are in use in a Cisco Catalyst 4507R chassis, the ports 1/2 and 2/2 do not function. This behavior is by design, and there is no hardware problem.

Resolution

In a Cisco Catalyst 4507R switch that uses Supervisor Engine IV modules, the design of the dual uplinks is to work when only one supervisor engine is present. The design works like this:

• When only one supervisor engine is present:
     
  • Ports 1/1 and 1/2 are functional if the supervisor engine is in slot 1.
           
  • Ports 2/1 and 2/2 are functional if the supervisor engine is in slot 2.
           
• When dual supervisor engines are present, only ports 1/1 and 2/1 are functional. Ports 1/2 and 2/2 do not function. This lack of function is not a failure.
     

For more information, refer to the Supervisor Uplink Redundancy section of High Availability and Redundancy in Catalyst 4500 Series Switches.

[abdulsalamkhan82]

Very nice TCC_2, I was confused before clarifying this.