Users Guide

Link type: point-to-point (auto)
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
Forward trac
EdgePort allows the interface to forward trac 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: Congure 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 Error Disabled state when receiving the BPDU, the physical interface
remains in the Up state. The hardware discards regular network trac after a BPDU violation. BPDUs are forwarded to the CPU, where
they are discarded as well.
• Enable EdgePort on an interface in INTERFACE mode.
spanning-tree port type edge
Congure 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 ecient network convergence by securely enforcing the active network topology. OS10
supports BPDU ltering, BPDU guard, root guard, and loop guard STP extensions.
BPDU
ltering Protects the network from unexpected ooding of BPDUs from an erroneous device. Enabling BPDU Filtering
instructs the hardware to drop BPDUs and prevents ooding from reaching the CPU. BPDU ltering is enabled by
default on Edge ports. All BPDUs received on the Edge port are dropped. If you explicitly congure BPDU ltering
on a port, that port drops all BPDUs that it receives.
BPDU guard 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 port (bridge or LAG) 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 trac drops but the port continues to forward BPDUs to the CPU that are later dropped. To prevent
further reception of BPDUs, congure a port to shut down using the
shutdown command. The port can only
resume operation from Shutdown state after manual intervention.
144 Layer 2