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Related
Documentation
Example: Configuring Root Protection to Enforce Root Bridge Placement in Spanning
Trees on EX Series Switches on page 1573
•
•
Example: Configuring Loop Protection to Prevent Interfaces from Transitioning from
Blocking to Forwarding in a Spanning Tree on EX Series Switches on page 1569
•
Example: Configuring BPDU Protection on STP Interfaces to Prevent STP
Miscalculations on EX Series Switches on page 1561
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Example: Configuring BPDU Protection on non-STP Interfaces to Prevent STP
Miscalculations on EX Series Switches on page 1565
•
Understanding MSTP for EX Series Switches on page 1521
•
Understanding RSTP for EX Series Switches on page 1520
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Understanding STP for EX Series Switches on page 1519
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Understanding VSTP for EX Series Switches on page 1525
Understanding VSTP for EX Series Switches
VLAN Spanning Tree Protocol (VSTP) allows Juniper Networks EX Series Ethernet
Switches to run one or more Spanning Tree Protocol (STP) or Rapid Spanning Tree
Protocol (RSTP) instances for each VLAN on which VSTP is enabled. For networks with
multiple VLANs, VSTP improves intelligent tree spanning by defining best paths within
the VLANs instead of within the entire network.
You can configure VSTP for a maximum of 253 VLANs. If you need to run a spanning-tree
protocol on more than 253 VLANs, you must configure VSTP and RSTP concurrently.
When VSTP and RSTP are configured, up to 253 VLANs can use VSTP and the remaining
VLANs use RSTP. You can selectively configure which VLANs use VSTP when VSTP and
RSTP are configured.
VSTP and RSTP are the only spanning-tree protocols that can be configured concurrently
on the switch.
NOTE:
We recommend that you enable VSTP on all VLANs that could receive
VSTP bridge protocol data units (BPDUs).
Related
Documentation
•
Understanding STP for EX Series Switches on page 1519
•
Understanding RSTP for EX Series Switches on page 1520
•
Understanding Layer 2 Protocol Tunneling on EX Series Switches on page 1299
•
Configuring VLAN Spanning Tree Protocol (CLI Procedure) on page 1584
1525
Copyright © 2010, Juniper Networks, Inc.
Chapter 64: Spanning-Tree Protocols—Overview
Summary of Contents for JUNOS OS 10.3 - SOFTWARE
Page 325: ...CHAPTER 17 Operational Mode Commands for System Setup 229 Copyright 2010 Juniper Networks Inc ...
Page 1323: ...CHAPTER 56 Operational Mode Commands for Interfaces 1227 Copyright 2010 Juniper Networks Inc ...
Page 2841: ...CHAPTER 86 Operational Commands for 802 1X 2745 Copyright 2010 Juniper Networks Inc ...
Page 3367: ...CHAPTER 113 Operational Mode Commands for CoS 3271 Copyright 2010 Juniper Networks Inc ...
Page 3435: ...CHAPTER 120 Operational Mode Commands for PoE 3339 Copyright 2010 Juniper Networks Inc ...
Page 3529: ...CHAPTER 126 Operational Mode Commands for MPLS 3433 Copyright 2010 Juniper Networks Inc ...