Users Guide

Table Of Contents
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bpduguard Enabled
MLL violation Enabled
MAC-move-violation Enabled
Recovery Time
Left
Interface Errdisable Cause (seconds)
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ethernet1/1/1:1 bpduguard 30
ethernet1/1/1:2 bpduguard 1
ethernet1/1/10 bpduguard/mac-learning-limit/mac-move 10
port-channel100 Mac-learning-limit 50
port-channel128 mac-move 49
Supported
Releases
10.4.2.0 or later
show spanning-tree interface
Displays spanning-tree interface information for Ethernet and port-channels.
Syntax
show spanning-tree interface {ethernet node/slot/port [:subport] | port-
channel port-id} [detail]
Parameters
ethernet node/slot/port[:subport] Displays spanning-tree information for a physical
interface.
port-channel port-id Displays spanning-tree information for a port-channel number, from 1
to 128.
detail (Optional) Displays detailed information on the interface.
Default Not configured
Command Mode EXEC
Usage
Information
None
Example
os10# show spanning-tree interface ethernet 1/1/7 detail
Port 56 (ethernet1/1/7) of vlan1 is designated Forwarding
Port path cost 500, Port priority 128, Port Identifier 128.56
Designated root priority: 32769, address: 34:17:ec:37:14:00
Designated bridge priority: 32769, address: 90:b1:1c:f4:a6:25
Designated port ID: 128.56, designated path cost: 500
Number of transitions to forwarding state: 1
Edge port: No (default)
Link Type: Point-to-Point
BPDU Sent: 6, Received: 6410
Supported
Releases
10.2.0E or later
Rapid per-VLAN spanning-tree
Rapid per-VLAN spanning-tree (Rapid-PVST) is used to create a single topology per VLAN. Rapid-PVST is enabled by default; it
provides faster convergence than STP and runs on the default VLAN (VLAN 1).
Configuring Rapid-PVST is a four-step process:
1. Ensure the interfaces are in L2 mode.
2. Place the interfaces in VLANs. By default, switchport interfaces are members of the default (VLAN1).
3. Enable Rapid-PVST. This step is only required if another variation of STP is present.
4. (Optional) Select a non-default bridge-priority for the VLAN for load balancing.
516
Layer 2