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  • Syntax

  • Hierarchy Level

  • Description

  • Required Privilege Level

  • Release Information

 

block (Spanning Trees)

Syntax

Hierarchy Level

Description

Configures loop protection on a specific interface.

Required Privilege Level

routing—To view this statement in the configuration.routing-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 9.1.

Statement updated in Junos OS Release 9.4 for EX Series switches to add VSTP support.

Related Documentation

  • Understanding Loop Protection for STP, RSTP, VSTP, and MSTP
  • Understanding VSTP
  • Example: Configuring Network Regions for VLANs with MSTP on Switches
  • Example: Configuring Faster Convergence and Improving Network Stability with RSTP
  • Example: Faster Convergence and Improved Network Stability with RSTP on EX Series Switches
  • Example: Configuring Loop Protection to Prevent Interfaces from Transitioning from Blocking to Forwarding in a Spanning Tree
  • Example: Configuring Loop Protection to Prevent Interfaces from Transitioning from Blocking to Forwarding in a Spanning Tree on non-ELS EX Series Switches
  • show spanning-tree bridge
  • show spanning-tree interface