Configuring Vlan Spanning Tree Protocol - Juniper EX9200 Features Manual

Spanning-Tree Protocols Feature Guide for EX9200 Switches

Configuring VLAN Spanning Tree Protocol

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Juniper Networks EX Series Ethernet Switches provide Layer 2 loop prevention through
Spanning Tree Protocol (STP), Rapid Spanning Tree Protocol (RSTP), Multiple Spanning
Tree Protocol (MSTP), and VLAN Spanning Tree Protocol (VSTP). The default factory
configuration for EX Series switches uses RSTP. This task describes the options for
configuring VSTP on an EX Series or QFX Series switch.
NOTE: On EX Series (other than EX9200) and QFX switches running Junos
OS that supports ELS—VSTP can support up to 510 VLANs. However, on
EX9200 switches, VSTP can support only up to 253 VLANs.
NOTE: When you configure VSTP, we recommend that you enable VSTP on
all VLANs that can receive VSTP bridge protocol data units (BPDUs).
NOTE: When you configure VSTP with the
VLAN ID 1 is not set; it is excluded so that the configuration is compatible with
Cisco PVST+. If you want VLAN ID 1 to be included in the VSTP configuration
on your switch, you must set it separately with the
command.
You can enable or disable VSTP as follows:
Enabling VSTP as the version of spanning-tree protocol to be configured:
Enable VSTP on an individual interface:
[edit]
user@switch@ set protocols
Enable VSTP on all interfaces on the switch:
[edit]
user@switch@ set protocols vstp interface all
Enable VSTP on a specific interface within a specific VLAN:
[edit]
user@switch@ set protocols vstp vlan vlan-id interface interface-name.
Enable VSTP on all the interfaces within a specific VLAN:
[edit]
user@switch@ set protocols vstp vlan vlan-id interface all
Enable VSTP on all the interfaces within all the VLANs on the switch:
set protocol vstp vlan all
vstp interface interface-name.
Copyright © 2017, Juniper Networks, Inc.
command,
set protocol vstp vlan 1