DCFM Enterprise User Manual (53-1001775-01, June 2010)

DCFM Enterprise User Manual 459

53-1001775-01

STP configurable parameters at the port or LAG level

You cannot configure Spanning Tree Protocol (STP) when adding a new LAG. STP can be configured

only after the LAG has been added to the switch.

Figure 191 shows the Spanning Tree Protocol (STP) parameters that are configurable at the port or

LAG level.

The ports and the ports in a link aggregation group (LAG) for the selected switch must be in Layer 2

(L2) mode. If the ports or ports in a LAG are not in L2 mode, a yellow banner displays, indicating

Spanning Tree Protocol is disabled and the STP parameters are disabled as well.

NOTE

STP is not supported for internal ports on the 10 Gbps CEE/FC switch module. If an internal port is

selected, the Edit Port dialog box and Spanning Tree Protocol tab do not display, and the L3 interface

mode is unavailable.

FIGURE 191 Spanning Tree Protocol dialog box, STP

You can configure the following Spanning Tree Protocol parameters.

• Mode - The spanning tree protocol mode.

• Path Cost - The port’s path cost. The value range is 1 - 2000000000.

• Link Type - The link type for STP. Valid values are Shared or P2P.

• Edge Port - Enables the edge port to allow the interface to quickly transition to a forwarding

state.

• BPDU Filter - Sets the portfast filter for the Bridge Protocol Data Units (BPDU). Valid values are

Enable or Disable.

• BPDU Guard - Guards the port against the reception of BPDUs. Valid values are Enable or

Disable.

• Port Priority - Port priority for MSTP. The value range is 0-240.