Technical data

BLADE OS 5.1 Application Guide
BMD00136, November 2009 Contents
 5
Chapter 5: Spanning Tree Group  73
STG Overview
 73
Bridge Protocol Data Units (BPDUs)
 74
BDPU Overview
 74
Determining the Path for Forwarding BPDUs
 75
Spanning Tree Group Guidelines
 76
Adding a VLAN to a Spanning Tree Group
 76
Creating a VLAN
 76
Rules for VLAN Tagged Ports
 77
Adding and Removing Ports from STGs
 77
Multiple Spanning Trees
 78
Default Spanning Tree Configuration
 78
Why Do We Need Multiple Spanning Trees?
 78
Spanning Tree with ISLs
 80
Multiple Spanning Tree Group Protocol
 81
MSTP Region
 81
Common Internal Spanning Tree
 81
MSTP Configuration Guidelines
 82
Port Fast Forwarding
 84
Fast Uplink Convergence
 84
Hot Links
 85
Forward Delay
 85
Pre-emption
 85
FDB Update
 85
Configuration Guidelines
 86
Configuring Hot Links
 86
Chapter 6: Link Layer Discovery Protocol
 87
LLDP Overview
 87
Enabling or Disabling LLDP
 88
Global LLDP Setting
 88
Transmit and Receive Control
 88
LLDP Transmit Features
 89
Scheduled Interval
 89
Minimum Interval
 89
Time-to-Live for Transmitted Information
 90
Trap Notifications
 90
Changing the LLDP Transmit State
 91
Types of Information Transmitted
 91