Alcatel-Lucent OmniSwitch AOS Release 7 Manual page 114

Sample Spanning Tree Configuration
4
Change the bridge priority value for VLAN 255 on Switch D to 10 using the following command
(leave the priority for VLAN 255 on the other three switches set to the default value):
-> spantree vlan 255 priority 10
VLAN 255 on Switch D has the lowest Bridge ID priority value of all four switches, which qualifies it as
the Spanning Tree root VLAN for the VLAN 255 broadcast domain.
Note. To verify the VLAN 255 Spanning Tree configuration on each switch use the following show
commands. The following outputs are for example purposes only and not match values shown in the
sample network configuration:
-> show spantree vlan 255
Spanning Tree Parameters for Vlan 255
Spanning Tree Status :
Protocol
mode
Priority
Bridge ID
Designated Root
Cost to Root Bridge
Root Port
Next Best Root Cost
Next Best Root Port
Tx Hold Count
Topology Changes
Topology age
Current Parameters (seconds)
Max Age
Forward Delay
Hello Time
Parameters system uses when attempting to become root
System Max Age
System Forward Delay =
System Hello Time
-> show spantree vlan 255 ports
Spanning Tree Port Summary for Vlan 255
Adm Oper Man. Path
Port Pri St St
-----+---+---+----+----+-----+-----+----+-----+---+---+----------------------
3/8 7 ENA FORW
3/9 7 ENA BLOCK
3/10 7 ENA BLOCK
page 5-46
: IEEE RAPID STP,
: per vlan (1 STP per Vlan),
: 32768(0x0FA0),
: 8000-00:d0:95:00:00:04,
: 000A-00:d0:95:00:00:01,
:
: Slot 3 Interface 8,
:
:
:
:
: 0:4:37
= 30,
= 15,
= 2
= 30,
15,
= 2
Desig
mode Cost Cost Role Port
No 4 29 ROOT
No 19 48 BACK
No 19 48 ALTN
OmniSwitch AOS Release 7 Network Configuration Guide
Configuring Spanning Tree Parameters
ON,
4,
0,
None,
6,
3,
Prim. Op Op
Cnx Edg Desig Bridge ID
3/8 NPT Edg 000A-00:d0:95:00:00:01
3/9 NPT No 8000-00:d0:95:00:00:04
3/10 NPT No 8000-00:d0:95:00:00:03
March 2011