Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 322

Boundary: Yes, Bpdu-filter: Disable, Bpdu-Guard: Disable, Shutdown-on-Bpdu-Guard-violation: No Root-Guard: Disable, Loop-Guard: Disable Bpdus (MRecords) Sent: 69, Received: 0 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/7 0.284 0 1 FWD 0 32768 90b1.1cf4.9b8a 0.284 EdgePort Forward traffic EdgePort allows the interface to forward traffic approximately 30 seconds sooner as it skips the Blocking and Learning states. The spanning-tree bpduguard enable command causes the interface hardware to shut down when it receives a BPDU. CAUTION: Configure EdgePort only on links connecting to an end station. EdgePort can cause loops if you enable it on an interface connected to a network. When you implement BPDU guard, although the interface is placed in the Error Disabled state when receiving the BPDU, the physical interface remains in the Up state. The hardware discards regular network traffic after a BPDU violation. BPDUs forward to the CPU, where they are discarded as well. • Enable EdgePort on an interface in INTERFACE mode. spanning-tree port type edge Configure EdgePort OS10(conf-if-eth1/1/4)# spanning-tree port type edge View interface status OS10# show spanning-tree interface ethernet 1/1/4 ethernet1/1/4 of MSTI 0 is designated Forwarding Edge port:yes port guard :none (default) Link type is point-to-point (auto) Boundary: YES bpdu filter :disable bpdu guard :disable bpduguard shutdown-on- violation :disable RootGuard: disable LoopGuard disable Bpdus (MRecords) sent 610, received 5 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/4 128.272 128 500 FWD 0 32768 90b1.1cf4.a911 128.272 Spanning-tree extensions STP extensions provide a means to ensure efficient network convergence by securely enforcing the active network topology. OS10 supports BPDU filtering, BPDU guard, root guard, and loop guard STP extensions. BPDU filtering BPDU guard Protects the network from unexpected flooding of BPDUs from an erroneous device. Enabling BPDU Filtering instructs the hardware to drop BPDUs and prevents flooding from reaching the CPU. BPDU filtering is enabled by default on Edge ports. All BPDUs received on the Edge port drops. If you explicitly configure BPDU filtering on a port, that port drops all BPDUs it receives. Blocks the L2 bridged ports and LAG ports connected to end hosts and servers from receiving any BPDUs. When you enable BPDU guard, it places a bridge or LAG port in the Error_Disable or Blocking state if the port receives any BPDU frames. In a LAG, all member ports, including new members are placed in the Blocking state. The network traffic drops but the port continues to forward BPDUs to the CPU that are later dropped. To prevent further reception of BPDUs, configure a port to shut down using the shutdown command. The port can only resume operation from the Shutdown state after manual intervention. 322 Layer 2