Dell W-7030 AOS 6.4.x User Guide - Page 679

Table 134: Port State Comparison STP (802.1d) Port State RSTP (802.1w) Port State Disabled Discarding Blocking Discarding Listening Discarding Learning Learning Forwarding Forwarding In addition to port state, RSTP introduces port roles for all the interfaces (see Table 135). Table 135: Port Role Descriptions RSTP (802.1w) Port Role Description Root The port that receives the best BPDU on a bridge. Designated The port can send the best BPDU on the segment to which it is connected. Alternate The port offers an alternate path, in the direction of root bridge, to that provided by bridge's root port. Backup The port acts as a backup for the path provided by a designated port in the direction of the spanning tree. To view the RSTP output, including state and port roles, enter the following command in the CLI: (host) (config) #show spantree The show spanning-tree interface command also indicates the state and port roles. See the example below for a partial output: (host) #show spanning-tree interface fastethernet 1/1 Interface FE 1/7 (port 8) in Spanning tree is FORWARDING Port path cost 19, Port priority 128 Role DESIGNATED Edge Port and Point-to-Point At the interface level, the portfast command specifies an interface as an edge port, and the point-to-point command specifies an interface as a point-to-point link. Since RSTP is enabled by default, all the interfaces are point-to-point links by default. Configuring RSTP Use either the CLI or the WebUI to configure RSTP. 679 | RSTP Dell Networking W-Series ArubaOS 6.4.x | User Guide