Dell C1048P Port Extender Networking Command-Line Reference Guide for the C900 - Page 1744

guard (OPTIONAL) Enter the keyword guard to display the type of guard enabled on an RSTP interface and the current port state. Command Modes • EXEC • EXEC Privilege Command History This guide is platform-specific. For command information about other platforms, refer to the relevant Dell Networking OS Command Line Reference Guide. The following is a list of the Dell Networking OS version history for this command. Version 9.9(0.0) 9.2(1.0) 8.3.19.0 8.3.11.1 8.4.2.1 8.3.7.0 7.6.1.0 7.5.1.0 6.4.1.0 6.2.1.1 Description Introduced on the C9010. Introduced on the Z9500. Introduced on the S4820T. Introduced on the Z9000. Added support for the optional guard keyword on the CSeries, S-Series, and E-Series TeraScale. Introduced on the S4810. Introduced on the S-Series. Introduced on the C-Series. Expanded to display the port error disable state (EDS) caused by loopback BPDU inconsistency. Introduced on the E-Series. Usage Information The following describes the show spanning-tree rstp guard command shown in the following example. Field Description Interface Name RSTP interface. Instance RSTP instance. Sts Port state: root-inconsistent (INCON Root), forwarding (FWD), listening (LIS), blocking (BLK), disabled (DIS), or shut down (EDS Shut). Guard Type Types of STP guard configured (Root, Loop, or BPDU guard) Example (Brief) Dell#show spanning-tree rstp brief Executing IEEE compatible Spanning Tree Protocol Root ID Priority 8192, Address 0001.e805.e306 Root Bridge hello time 4, max age 20, forward delay 15 Bridge ID Priority 16384, Address 0001.e801.6aa8 Configured hello time 2, max age 20, forward delay 15 1744 Rapid Spanning Tree Protocol (RSTP)