(Lưu ý: các switch khác cũng nên cấu hình lên trunk trên các cổng nối với switch).. SW2(config)#spanning-tree portfast default -> bật port-fast trên các cổng không phải là trunk[r]
(1)Spanning-Tree Protocol ( STP )
A STP
1 Tất đường mạng 100 Mbps
Xem địa MAC switch, xếp lại cho SW1 có giá trị MAC nhỏ Thứ tự MAC switch sau: SW1 < SW2 < SW3 < SW4 < SW5
Cắm dây cho switch Switch#show version
………
63488K bytes of flash-simulated non-volatile configuration memory Base ethernet MAC Address : 000B.BE13.6878
Motherboard assembly number : 73-9832-06 Power supply part number : 341-0097-02 Motherboard serial number : FOC103248MJ Power supply serial number : DCA102133JA Model revision number : B0
Motherboard revision number : C0
Model number : WS-C2960-24TT System serial number : FOC1033Z1EY Top Assembly Part Number : 800-26671-02 ………
2 Kiểm tra xem switch root, cổng Root Port, Designated Port, trạng thái cổng v…v SW1#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee Root ID Priority 32769
Address 0001.6353.05C8 -> MAC Root Switch
This bridge is the root -> cho biết switch SW1 Root Hello Time sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0001.6353.05C8 -> MAC switch Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
22
21 23
24
23 22 22
24
24 22
23
23 24
(2)- - - - -Fa0/22 Desg FWD 19 128.22 P2p
Fa0/23 Desg FWD 19 128.23 P2p Fa0/24 Desg FWD 19 128.24 P2p
SW2#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee Root ID Priority 32769
Address 0001.6353.05C8 Cost 19
Port 23(FastEthernet0/23)
Hello Time sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 000A.F390.8E40
Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
- - - - -Fa0/22 Desg FWD 19 128.22 P2p
Fa0/23 Root FWD 19 128.23 P2p Fa0/24 Desg FWD 19 128.24 P2p
SW3#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee Root ID Priority 32769
Address 0001.6353.05C8 Cost 19
Port 24(FastEthernet0/24)
Hello Time sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 000A.F3D9.5255
Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
- - - - -Fa0/22 Desg FWD 19 128.22 P2p
Fa0/23 Desg FWD 19 128.23 P2p Fa0/24 Root FWD 19 128.24 P2p
SW4#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee Root ID Priority 32769
Address 0001.6353.05C8 Cost 19
Port 24(FastEthernet0/24)
(3)Address 000B.BE13.6878
Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
- - - - -Fa0/22 Altn BLK 19 128.22 P2p
Fa0/23 Altn BLK 19 128.23 P2p Fa0/24 Root FWD 19 128.24 P2p
SW5#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee Root ID Priority 32769
Address 0001.6353.05C8 Cost 19
Port 21(FastEthernet0/21)
Hello Time sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0060.4710.3E36
Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
- - - - -Fa0/21 Root FWD 19 128.21 P2p
Fa0/22 Altn BLK 19 128.22 P2p Fa0/23 Altn BLK 19 128.23 P2p Fa0/24 Desg FWD 19 128.24 P2p
3 Đổi tốc độ cổng nối SW1 – SW2 SW1 – SW5 thành 10 Mbps Show lại STP để kiểm tra thay đổi
SW1(config)#int fa0/22 SW1(config-if)#speed 10 SW1(config)#int fa0/23 SW1(config-if)#speed 10 SW2(config)#int fa0/23 SW2(config-if)#speed 10 SW5(config)#int fa0/21 SW5(config-if)#speed 10
4 Cấu hình port-fast cổng cịn lại Rồi cắm PC vào kiểm tra thời gian chuyển từ đèn cam lên đèn xanh
Cách 1: cổng cấu hình
SW1(config)#int range fa0/1 – 21 -> cấu hình port từ đến 21 SW1 SW1(config-if-range)#spanning-tree portfast
Cách 2: bật tính port-fast cổng trunk port
SW2(config)#int range fa0/22-24 -> chuyển thành trunk cổng nối với swich SW2(config-if-range)#switchport mode trunk
(4)SW2(config)#spanning-tree portfast default -> bật port-fast cổng trunk
B PVSTP+
1 Tạo thêm VLAN 2,3 switch SW1(config)#vlan
SW1(config-vlan)#name Sale SW1(config-vlan)#exit
SW1(config)#vlan
SW1(config-vlan)#name Tech SW1(config-vlan)#exit
SW1(config)#vtp domain lab.com SW1(config)#vtp mode server SW2(config)#vtp domain lab.com SW2(config)#vtp mode client SW3(config)#vtp domain lab.com SW3(config)#vtp mode client SW4(config)#vtp domain lab.com SW4(config)#vtp mode client SW5(config)#vtp domain lab.com SW5(config)#vtp mode client
2 Cấu hình để VLAN2 thấy SW2 Root, VLAN1 thấy SW5 Root, VLAN thấy SW3 Root SW5(config)#spanning-tree vlan root primary
SW2(config)#spanning-tree vlan root primary SW3(config)#spanning-tree vlan root primary SW5#show spanning-tree vlan
VLAN0001
Spanning tree enabled protocol ieee Root ID Priority 24577
Address 0060.4710.3E36 This bridge is the root
Hello Time sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 24577 (priority 24576 sys-id-ext 1)
Address 0060.4710.3E36
Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
- - - - -Fa0/21 Desg FWD 19 128.21 P2p
Fa0/22 Desg FWD 19 128.22 P2p Fa0/23 Desg FWD 19 128.23 P2p Fa0/24 Desg FWD 19 128.24 P2p
SW2#show spanning-tree vlan
VLAN0002
(5)Address 000A.F390.8E40 This bridge is the root
Hello Time sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 24578 (priority 24576 sys-id-ext 2)
Address 000A.F390.8E40
Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
- - - - -Fa0/22 Desg FWD 19 128.22 P2p
Fa0/23 Desg FWD 19 128.23 P2p Fa0/24 Desg FWD 19 128.24 P2p
SW3#show spanning-tree vlan
VLAN0003
Spanning tree enabled protocol ieee Root ID Priority 24579
Address 000A.F3D9.5255 This bridge is the root
Hello Time sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 24579 (priority 24576 sys-id-ext 3)
Address 000A.F3D9.5255
Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
- - - - -Fa0/22 Desg LSN 19 128.22 P2p
Fa0/23 Desg LSN 19 128.23 P2p Fa0/24 Desg LSN 19 128.24 P2p
C RSTP
1 Cấu hình để switch chuyển sang chế độ sử dụng RSTP, kiểm tra lại thời gian hội tụ SW1(config)#spanning-tree mode rapid-pvst
SW1#show spanning-tree
VLAN0001
Spanning tree enabled protocol rstp Root ID Priority 24577
Address 0060.4710.3E36 Cost 19
Port 22(FastEthernet0/22)
Hello Time sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0001.6353.05C8
Hello Time sec Max Age 20 sec Forward Delay 15 sec Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
- - - - -Fa0/22 Root LSN 19 128.22 P2p
Fa0/23 Desg BLK 19 128.23 P2p Fa0/24 Desg BLK 19 128.24 P2p