Extend System-Id - Dell S6000 Reference Manual

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.
S6000
Syntax
extend system-id
Defaults Disabled
Command PROTOCOL PVST
Modes
Command
This guide is platform-specific. For command information about other platforms,
History
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 9.0.2.0
Version
8.3.19.0
Version 8.3.11.1
Version 8.3.7.0
Version 8.3.1.0
Example
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
-------------------------------------------------------------
Gi 0/10 128.140 128
128.140
Gi 0/12 128.142 128
128.142
Interface
Name
--------------------------------------------------------
Gi 0/10
Gi 0/12
Related
protocol spanning-tree pvst
Commands
1092
Introduced on the S6000.
Introduced on the S4820T.
Introduced on the Z9000.
Introduced on the S4810.
Introduced.
PortID Prio Cost
200000 FWD 0
200000 DIS 0
Role PortID Prio
Desg 128.140 128
Dis 128.142 128
– enter SPANNING TREE mode on the switch.
Sts Cost Bridge ID
32773 0001.e832.73f7
32773 0001.e832.73f7
Cost Sts Cost Link-type Edge
200000 FWD 0 P2P
200000 DIS 0 P2P
Per-VLAN Spanning Tree Plus (PVST+)
PortID
No
No