Alcatel 9000 Betriebsanweisung Seite 149

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Configuring Spanning Tree Parameters Sample Spanning Tree Configuration
OmniSwitch 6800/6850/9000 Network Configuration Guide June 2006 page 6-33
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 : ON,
Protocol : IEEE 802.1W (Fast STP),
mode : 1X1 (1 STP per Vlan),
Priority : 32768(0x0FA0),
Bridge ID : 8000-00:d0:95:00:00:04,
Designated Root : 000A-00:d0:95:00:00:01,
Cost to Root Bridge : 4,
Root Port : Slot 3 Interface 8,
Next Best Root Cost : 0,
Next Best Root Port : None,
Hold Time : 1,
Topology Changes : 3,
Topology age : 0:4:37
Current Parameters (seconds)
Max Age = 30,
Forward Delay = 15,
Hello Time = 2
Parameters system uses when attempting to become root
System Max Age = 30,
System Forward Delay = 15,
System Hello Time = 2
-> show spantree 255 ports
Spanning Tree Port Summary for Vlan 255
Adm Oper Man. Path Desig Fw Prim. Adm Op
Port Pri St St mode Cost Cost Role Tx Port Cnx Cnx Desig Bridge ID
-----+---+---+----+----+-----+-----+----+---+-----+---+---+----------------------
3/8 7 ENA FORW No 4 29 ROOT 1 3/8 NPT NPT 000A-00:d0:95:00:00:01
3/9 7 ENA BLOCK No 19 48 BACK 0 3/9 NPT NPT 8000-00:d0:95:00:00:04
3/10 7 ENA BLOCK No 19 48 ALTN 0 3/10 NPT NPT 8000-00:d0:95:00:00:03
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