BLADE OS™ Application Guide HP GbE2c Ethernet Blade Switch for c-Class BladeSystem Version 5.1 Advanced Functionality Software

Table Of Contents
BLADE OS 5.1 Application Guide
6 Contents BMD00113, September 2009
Chapter 5: Spanning Tree Protocol 109
STP Overview
109
Bridge Protocol Data Units (BPDUs)
110
BDPU Overview
110
Determining the Path for Forwarding BPDUs
111
Spanning Tree Group Configuration Guidelines
112
Default Spanning Tree configuration
112
Adding a VLAN to an STG
112
Creating a VLAN
112
Rules for VLAN Tagged Ports
113
Adding and Removing Ports from STGs
113
Assigning Cost to Ports and Trunk Groups
114
Multiple Spanning Trees
115
Default Spanning Tree Configuration
115
Why Do We Need Multiple Spanning Trees?
115
VLAN Participation in Spanning Tree Groups
116
Configuring Multiple Spanning Tree Groups
117
Port Fast Forwarding
118
Fast Uplink Convergence
118
Hot Links
119
Forward Delay
119
Pre-emption
119
FDB Update
120
Configuration Guidelines
120
Configuring Hot Links
120
Chapter 6: RSTP and MSTP
121
Rapid Spanning Tree Protocol
122
Port State Changes
122
Port Type and Link Type
123
PVRST+
123
RSTP Configuration Guidelines
124
RSTP Configuration Example
124
Multiple Spanning Tree Protocol
125
MSTP Region
125
Common Internal Spanning Tree
125
MSTP Configuration Guidelines
126
MSTP Configuration Example
126