Reference Guide

2. Change the port priority of an interface in INTERFACE mode (0 to 240 in increments of 16, default 128).
spanning-tree msti number priority priority
View MSTi interface configuration
OS10(conf-if-eth1/1/7)# do show spanning-tree msti 0 interface ethernet 1/1/7
ethernet1/1/7 of MSTI 0 is Designated Forwarding
Edge port: No (default)
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 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 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 are
forwarded 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
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 are dropped. If you
explicitly configure BPDU filtering on a port, that port drops all BPDUs that it receives.
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