Alcatel-Lucent OmniSwitch 6800 Series Network Configuration Manual page 193

Configuring Spanning Tree Parameters
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 of 32768):
-> bridge 255 priority 10
VLAN 255 on Switch D will have the lowest Bridge ID priority value of all four switches, which will
qualify 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 may not match values shown in the
sample network configuration:
-> show spantree 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 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
OmniSwitch 6800/6850/9000 Network Configuration Guide
: IEEE 802.1W (Fast STP),
: 1X1 (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
Sample Spanning Tree Configuration
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 2008 page 7-43