Dell C1048P Port Extender Networking Command-Line Reference Guide for the C900 - Page 1544

extend system-id To augment the Bridge ID with a VLAN ID so that PVST+ differentiate between BPDUs for each VLAN, use extend system ID. If the VLAN receives a BPDU meant for another VLAN, PVST+ does not detect a loop, and both ports can remain in Forwarding state. C9000 Series Syntax extend system-id Defaults Disabled Command Modes PROTOCOL PVST 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 8.3.7.0 8.3.1.0 Description Introduced on the C9010. Introduced on the Z9500. Introduced on the S4820T. Introduced on the Z9000. Introduced on the S4810. Introduced. Example Related Commands Dell(conf-pvst)#do show spanning-tree pvst vlan 5 brief 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 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID Te 0/10 128.140 128 200000 FWD 0 32773 0001.e832.73f7 128.140 Te 0/12 128.142 128 200000 DIS 0 32773 0001.e832.73f7 128.142 Interface Name Role PortID Prio Cost Sts Cost Link-type Edge Te 0/10 Desg 128.140 128 200000 FWD 0 P2P No Te 0/12 Dis 128.142 128 200000 DIS 0 P2P No protocol spanning-tree pvst - enter SPANNING TREE mode on the switch. 1544 Per-VLAN Spanning Tree Plus (PVST+)