Data Center Fabric Manager Enterprise User Manual v10.3.X (53-1001357-01, November 2009)

DCFM Enterprise User Manual 437

53-1001357-01

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.

NOTE

When STP is disabled on the switch, a yellow banner displays on the dialog box, indicating that STP

is not only disabled on the switch, it is also disabled for all ports and LAGs on the switch. The yellow

banner also displays when a LAG or port is not in L2 mode.

Figure 169 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, Spanning Tree Protocol is disabled and

the STP parameters are disabled as well.

FIGURE 169 Spanning Tree Protocol dialog box, STP and RSTP

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.

• Port Fast - Enables an interface to move directly to forward on link up. Valid values are Enable

or Disable, applicable only to STP.

• 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.