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IBM RackSwitch G8000 User Manual

IBM RackSwitch G8000
362 pages
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8 RackSwitch G8000: Application Guide
Chapter 10. Spanning Tree Protocols . . . . . . . . . . . . . . . 115
Spanning Tree Protocol Modes . . . . . . . . . . . . . . . . . . . 115
Global STP Control . . . . . . . . . . . . . . . . . . . . . . . 116
PVRST Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Port States . . . . . . . . . . . . . . . . . . . . . . . . . 117
Bridge Protocol Data Units . . . . . . . . . . . . . . . . . . . 117
Bridge Protocol Data Units Overview . . . . . . . . . . . . . 117
Determining the Path for Forwarding BPDUs . . . . . . . . . . 117
Simple STP Configuration . . . . . . . . . . . . . . . . . . . 119
Per-VLAN Spanning Tree Groups . . . . . . . . . . . . . . . . 121
Using Multiple STGs to Eliminate False Loops. . . . . . . . . . 121
VLANs and STG Assignment . . . . . . . . . . . . . . . . 121
Manually Assigning STGs. . . . . . . . . . . . . . . . . . 122
Guidelines for Creating VLANs . . . . . . . . . . . . . . . . 123
Rules for VLAN Tagged Ports . . . . . . . . . . . . . . . . 123
Adding and Removing Ports from STGs . . . . . . . . . . . . 123
The Switch-Centric Model. . . . . . . . . . . . . . . . . . 124
Configuring Multiple STGs . . . . . . . . . . . . . . . . . . . 125
Rapid Spanning Tree Protocol . . . . . . . . . . . . . . . . . . . 126
Port States . . . . . . . . . . . . . . . . . . . . . . . . . 126
RSTP Configuration Guidelines . . . . . . . . . . . . . . . . . 126
RSTP Configuration Example . . . . . . . . . . . . . . . . . . 126
Multiple Spanning Tree Protocol . . . . . . . . . . . . . . . . . . 127
MSTP Region . . . . . . . . . . . . . . . . . . . . . . . . 127
Common Internal Spanning Tree . . . . . . . . . . . . . . . . 127
MSTP Configuration Guidelines . . . . . . . . . . . . . . . . . 127
MSTP Configuration Examples . . . . . . . . . . . . . . . . . 128
Port Type and Link Type . . . . . . . . . . . . . . . . . . . . . 129
Edge Port . . . . . . . . . . . . . . . . . . . . . . . . . 129
Link Type. . . . . . . . . . . . . . . . . . . . . . . . . . 130
Chapter 11. Quality of Service . . . . . . . . . . . . . . . . . . 131
QoS Overview . . . . . . . . . . . . . . . . . . . . . . . . . 131
Using ACL Filters . . . . . . . . . . . . . . . . . . . . . . . . 133
Summary of ACL Actions . . . . . . . . . . . . . . . . . . . 133
ACL Metering and Re-Marking . . . . . . . . . . . . . . . . . 134
Using DSCP Values to Provide QoS . . . . . . . . . . . . . . . . . 134
Differentiated Services Concepts . . . . . . . . . . . . . . . . 135
Per Hop Behavior . . . . . . . . . . . . . . . . . . . . . . 135
QoS Levels . . . . . . . . . . . . . . . . . . . . . . . . . 136
DSCP Re-Marking and Mapping . . . . . . . . . . . . . . . . . 137
DSCP Re-Marking Configuration Examples . . . . . . . . . . . . 138
Using 802.1p Priority to Provide QoS . . . . . . . . . . . . . . . . 140
Queuing and Scheduling . . . . . . . . . . . . . . . . . . . . . 141
Part 4: Advanced Switching Features . . . . . . . . . . . . . . . 143
Chapter 12. Virtualization . . . . . . . . . . . . . . . . . . . . 145
Chapter 13. Stacking . . . . . . . . . . . . . . . . . . . . . . 147
Stacking Overview . . . . . . . . . . . . . . . . . . . . . . . . 148
Stacking Requirements . . . . . . . . . . . . . . . . . . . . 148
Stacking Limitations . . . . . . . . . . . . . . . . . . . . . 149

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IBM RackSwitch G8000 Specifications

General IconGeneral
BrandIBM
ModelRackSwitch G8000
CategoryNetwork Router
LanguageEnglish

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