void __4_4_6__SPANNING_TREE_SUPPORT() {
    /**
     * @group:       	4.4.6 SPANNING TREE SUPPORT
     *
     * @description: 	To support spanning tree, one port is the designated port for the host processor, which is defined as the port for which
     * 					tail tagging is enabled. Each of the other ports can be configured in one of the five spanning tree states via “transmit
     * 					enable”, “receive enable” and “learning disable” register bits. Table 4-13 shows the setting and software actions taken
     * 					for each of the five spanning tree states.
     *
     *
     *					TABLE 4-13: SPANNING TREE STATES
     *
     *					| STATE            | PORT SETTING                         | SOFTWARE ACTION                                           |
     *					+------------------+--------------------------------------+-----------------------------------------------------------+
     *					| Disable State    | The port should not forward or       | The processor should not send any packets to the port.    |
     *					|                  | receive any packets.                 | The switch may still send specific packets to the pro-    |
     *					|                  | Learning is disabled.                | cessor (packets that match some entries in the “Static    |
     *					|                  |                                      | MAC Table” with “overriding bit” set) and the processor   |
     *					|                  | transmit enable = 0                  | should discard those packets. Address learning is dis-    |
     *					|                  | receive enable = 0                   | abled on the port in this state.                          |
     *					|                  | learning disable = 1                 |                                                           |
     *					+------------------+--------------------------------------+-----------------------------------------------------------+
     *					| Blocking State   | Only packets to the processor        | The processor should not send any packets to the          |
     *					|                  | are forwarded.                       | port(s) in this state. The processor should program the   |
     *					|                  | Learning is disabled.                | “Static MAC Table” with the entries that it needs to      |
     *					|                  |                                      | receive (for example, BPDU packets). The “overriding”     |
     *					|                  | transmit enable = 0                  | bit should also be set so that the switch will forward    |
     *					|                  | receive enable = 0                   | those specific packets to the processor. Address learn-   |
     *					|                  | learning disable = 1                 | ing is disabled on the port in this state.                |
     *					+------------------+--------------------------------------+-----------------------------------------------------------+
     *					| Listening State  | Only packets to and from the         | The processor should program the “Static MAC Table”       |
     *					|                  | processor are forwarded.             | with the entries that it needs to receive (for example,   |
     *					|                  | Learning is disabled.                | BPDU packets). The “overriding” bit should be set so      |
     *					|                  |                                      | that the switch will forward those specific packets to    |
     *					|                  | transmit enable = 0                  | the processor. The processor may send packets to the      |
     *					|                  | receive enable = 0                   | port(s) in this state. Address learning is disabled on the|
     *					|                  | learning disable = 1                 | port in this state.                                       |
     *					+------------------+--------------------------------------+-----------------------------------------------------------+
     *					| Learning State   | Only packets to and from the         | The processor should program the “Static MAC Table”       |
     *					|                  | processor are forwarded.             | with the entries that it needs to receive (for example,   |
     *					|                  | Learning is enabled.                 | BPDU packets). The “overriding” bit should be set so      |
     *					|                  |                                      | that the switch will forward those specific packets to    |
     *					|                  | transmit enable = 0                  | the processor. The processor may send packets to the      |
     *					|                  | receive enable = 0                   | port(s) in this state. Address learning is enabled on the |
     *					|                  | learning disable = 0                 | port in this state.                                       |
     *					+------------------+--------------------------------------+-----------------------------------------------------------+
     *					| Forwarding State | Packets are forwarded and            | The processor programs the “Static MAC Table” with        |
     *					|                  | received normally.                   | the entries that it needs to receive (for example, BPDU   |
     *					|                  | Learning is enabled.                 | packets). The “overriding” bit is set so that the switch  |
     *					|                  |                                      | forwards those specific packets to the processor. The     |
     *					|                  | transmit enable = 1                  | processor can send packets to the port(s) in this state.  |
     *					|                  | receive enable = 1                   | Address learning is enabled on the port in this state.    |
     *					|                  | learning disable = 0                 |                                                           |
     *					+------------------+--------------------------------------+-----------------------------------------------------------+
     *
     */
}