Dell PowerEdge FN I/O Module Command Line Reference Guide 9.10(0.0)

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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.

Syntax

extend system-id

Defaults

Disabled

Command Modes

PROTOCOL PVST

Supported Modes

Full—Switch

Command History

Version	Description
9.9(0.0)	Introduced on the FN IOM.
8.3.16.1	Introduced on the MXL 10/40GbE Switch IO Module.

Example

Dell(conf-pvst)#do show spanning-tree pvst vlan 2 brief
                                             VLAN 2
                                             Executing IEEE compatible Spanning Tree Protocol
                                             Root ID    Priority 32768, Address 001e.c9f1.00f3
                                             Root Bridge hello time 2, max age 20, forward delay 15
                                             Bridge ID  Priority 32768, Address 001e.c9f1.00f3
                                             We are the root of Vlan 2
                                             Configured hello time 2, max age 20, forward delay 15
                                             Bpdu filter disabled globally
                                             
                                             Interface                              Designated
                                             Name  PortID  Prio Cost  Sts  Cost Bridge ID
                                             PortID
                                             ---------- -------- ---- ------ ----------- -------
                                             -------------------- --------
                                             Po 23 128.24  128  1600  FWD  0    32768
                                             001e.c9f1.00f3 128.24
                                             Te 0/10 128.450 128 2000 DIS  0    32768
                                             001e.c9f1.00f3 128.450
                                             Te 0/11 128.459 128 2000 FWD  0    32768
                                             001e.c9f1.00f3 128.459
                                             
                                             Interface
                                             Name    Role  PortID  Prio  Cost  Sts  Cost Link-type
                                             Edge BpduFilter
                                             ---------- ------ -------- ---- ---- ---------
                                             ---- ----------
                                             Po 23   Desg  128.24  128  1600  FWD  0   P2P No
                                             No
                                             Te 0/9 Dis   128.450 128  2000  DIS  0   P2P No
                                             No
                                             Te 0/10 Desg  128.459 128  2000  FWD  0   P2P No
                                             No

Related Commands

protocol spanning-tree pvst — enter SPANNING TREE mode on the switch.