Fabric switchover for systems with control plane and fabric plane on same board

A network device comprising:

• a first control card including:
• a first control plane, and
• a first fabric plane;
• a second control card including:
• a second control plane, and
• a second fabric plane;
• and
• input/output units,
• the first control plane being to:
• verify links between the first fabric plane and the input/output units,
• detect, after verifying the links between the first fabric plan and the input/output units, a first failure of the second control plane while the first control plane is in standby,
• switch, based on detecting the first failure of the second control plane, the first control plane from being in standby to being active;
• detect a second failure of the second fabric plane;
• and
• initiate, based on detecting the second failure of the second fabric plane, a switchover to the first fabric plane without again verifying the links with the input/output units after detecting the second failure of the second fabric plane and before initiating the switchover to the first fabric plane.

A non-transitory computer-readable medium storing instructions, the instructions comprising:

• one or more instructions that, when executed by a first control plane, cause the first control plane to:
• verify links between a first fabric plane and input/output units of a network device that includes a first control card and a second control card;
• detect a first failure of a second control plane while the first control plane is in standby,
• the first control card including the first control plane and a first fabric plane, and
• the second control card including the second control plane and a second fabric plane;
• switch, based on the first control plane detecting the first failure of the second control plane, the first control plane from being in standby to being active;
• detect a second failure of the second fabric plane;
• and
• initiate, based on detecting the second failure of the second fabric plane, a switchover to the first fabric plane without again verifying the links with the input/output units after detecting the second failure of the second fabric plane and before initiating the switchover to the first fabric plane.