Dell Force10 E1200i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 792

www.dell.com | support.dell.com Figure 43-3. PVST+ with Extend System ID Dell Force10 System P1 untagged in VLAN 10 XP2 untagged in VLAN 20 moves to blocking unless Extended System ID is enabled VLAN unaware Hub Task Command Syntax Command Mode Augment the Bridge ID with the VLAN ID. extend system-id FTOS(conf-pvst)#do show spanning-tree pvst vlan 5 brief PROTOCOL PVST VLAN 5 Executing IEEE compatible Spanning Tree Protocol Root ID Priority 32773, Address 0001.e832.73f7 Root Bridge hello time 2, max age 20, forward delay 15 Bridge ID Priority 32773 (priority 32768 sys-id-ext 5), Address 0001.e832.73f7 We are the root of Vlan 5 Configured hello time 2, max age 20, forward delay 15 ... Displaying STP Guard Configuration To verify the STP guard configured on PVST interfaces, enter the show spanning-tree pvst [vlan vlan-id] guard command. Refer to the Spanning Tree Protocol chapter for information on how to configure and use the STP root guard, loop guard, and BPDU guard features. The following output example shows an example for VLAN 5 in a PVST network in which: • Root guard is enabled on a port that is in a root-inconsistent state. • Loop guard is enabled on a port that is in a forwarding state. • BPDU guard is enabled on a port that is shut down. FTOS#show spanning-tree pvst vlan 5 guard Interface Name Instance Sts Guard type Gi 0/1 5 INCON(Root) Root Gi 0/2 5 FWD Loop Gi 0/3 5 EDS(shut) Bpdu 792 | Per-VLAN Spanning Tree Plus