lab 14 - spanning tree
TRANSCRIPT
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 1
SPANNING-TREE PROTOCOL
1. Kết nối thiết bị như hình.
2. Cấu hình tên cho các thiết bị Switch.
3. Đặt địa chỉ IP PC0 và PC1 cùng đường mạng với địa chỉ IP là: 192.168.1.2/24 và 192.168.1.3/24.
Cấu hình chức năng portfast trên các cổng fa0/20 của Switch1 và Switch2
4. Kiểm tra Spanning Tree trên các Switch, đọc hiểu các thông tin trên các Switch.
5. Thực hiện cấu hình Priority là 4096 trên Switch2 để Switch2 trở thành Root Bridge. Kiểm tra lại
thông tin Spanning-Tree.
6. Thực hiện shutdown cổng Fa0/5 trên Switch1 trong khi đó tiếp tục ping từ PC0 đến PC1. Kiểm
tra thời gian mất gói.
7. Thực hiện thay đổi PVST+ sang PVRST+ trên tất cả các Switch. Kiểm tra lại thông tin Spanning-
Tree.
8. Lưu cấu hình.
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 2
Hướng dẫn:
1. Kết nối thiết bị như hình.
2. Cấu hình tên cho các thiết bị Switch.
Switch(config)#hostname Switch0
Switch0(config)#
Switch(config)#hostname Switch1
Switch1(config)#
Switch(config)#hostname Switch2
Switch2(config)#
Switch(config)#hostname Switch3
Switch3(config)#
3. Đặt địa chỉ IP PC0 và PC1 cùng đường mạng với địa chỉ IP là: 192.168.1.2/24 và 192.168.1.3/24.
Cấu hình chức năng portfast trên các cổng fa0/20 của Switch1 và Switch2.
- Đặt địa chỉ IP cho PC0 và PC1
PC>ipconfig /all
Physical Address................: 00E0.A336.9554
IP Address......................: 192.168.1.2
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.1.1
DNS Servers.....................: 0.0.0.0
PC>ipconfig /all
Physical Address................: 0001.9764.E731
IP Address......................: 192.168.1.3
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.1.1
DNS Servers.....................: 0.0.0.0
PC>ping 192.168.1.3
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 3
Pinging 192.168.1.3 with 32 bytes of data:
Reply from 192.168.1.3: bytes=32 time=125ms TTL=128
Reply from 192.168.1.3: bytes=32 time=125ms TTL=128
Reply from 192.168.1.3: bytes=32 time=110ms TTL=128
Reply from 192.168.1.3: bytes=32 time=77ms TTL=128
Ping statistics for 192.168.1.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 77ms, Maximum = 125ms, Average = 109ms
- Cấu hình chức năng PortFast:
Switch1(config)#interface fastEthernet 0/20
Switch1(config-if)#spanning-tree portfast
%Warning: portfast should only be enabled on ports connected to a single
host. Connecting hubs, concentrators, switches, bridges, etc... to this
interface when portfast is enabled, can cause temporary bridging loops.
Use with CAUTION
%Portfast has been configured on FastEthernet0/20 but will only
have effect when the interface is in a non-trunking mode.
Switch1(config-if)#no shut
Switch2(config)#interface fastEthernet 0/20
Switch2(config-if)#spanning-tree portfast
%Warning: portfast should only be enabled on ports connected to a single
host. Connecting hubs, concentrators, switches, bridges, etc... to this
interface when portfast is enabled, can cause temporary bridging loops.
Use with CAUTION
%Portfast has been configured on FastEthernet0/20 but will only
have effect when the interface is in a non-trunking mode.
Switch2(config-if)#no shut
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 4
4. Kiểm tra Spanning Tree trên các Switch, đọc hiểu các thông tin trên các Switch.
Switch0#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0007.EC7A.6057
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0007.EC7A.6057
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1 Desg FWD 19 128.1 P2p
Fa0/2 Desg FWD 19 128.2 P2p
Switch1#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0007.EC7A.6057
Cost 19
Port 3(FastEthernet0/3)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 5
Address 00E0.B009.BEE8
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/3 Root FWD 19 128.3 P2p
Fa0/5 Altn BLK 19 128.5 P2p
Fa0/7 Desg FWD 19 128.7 P2p
Fa0/9 Desg FWD 19 128.9 P2p
Fa0/20 Desg FWD 19 128.20 P2p
Switch2#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0007.EC7A.6057
Cost 19
Port 4(FastEthernet0/4)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0060.4799.9468
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/4 Root FWD 19 128.4 P2p
Fa0/6 Desg FWD 19 128.6 P2p
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 6
Fa0/20 Desg FWD 19 128.20 P2p
Switch3#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0007.EC7A.6057
Cost 19
Port 8(FastEthernet0/8)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 00E0.A3E4.2AA9
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/8 Root FWD 19 128.8 P2p
Fa0/10 Altn BLK 19 128.10 P2p
5. Thực hiện cấu hình Priority là 4096 trên Switch2 để Switch2 trở thành Root Bridge. Kiểm tra lại
thông tin Spanning-Tree.
Switch2(config)#spanning-tree vlan 1 priority 4096
Switch2#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 4097
Address 0060.4799.9468
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 7
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 4097 (priority 4096 sys-id-ext 1)
Address 0060.4799.9468
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/4 Desg FWD 19 128.4 P2p
Fa0/6 Desg FWD 19 128.6 P2p
Fa0/20 Desg FWD 19 128.20 P2p
6. Thực hiện shutdown cổng Fa0/5 trên Switch1 trong khi đó tiếp tục ping từ PC0 đến PC1. Kiểm
tra thời gian mất gói.
Switch1(config)#interface fastEthernet 0/5
Switch1(config-if)#shutdown
%LINK-5-CHANGED: Interface FastEthernet0/5, changed state to administratively
down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/5, changed state
to down
PC>ping -t 192.168.1.3
Pinging 192.168.1.3 with 32 bytes of data:
Reply from 192.168.1.3: bytes=32 time=109ms TTL=128
Reply from 192.168.1.3: bytes=32 time=94ms TTL=128
Reply from 192.168.1.3: bytes=32 time=94ms TTL=128
Reply from 192.168.1.3: bytes=32 time=94ms TTL=128
Reply from 192.168.1.3: bytes=32 time=94ms TTL=128
Request timed out.
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 8
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Reply from 192.168.1.3: bytes=32 time=125ms TTL=128
Reply from 192.168.1.3: bytes=32 time=82ms TTL=128
Reply from 192.168.1.3: bytes=32 time=110ms TTL=128
Ping statistics for 192.168.1.3:
Packets: Sent = 42, Received = 37, Lost = 5 (12% loss),
Approximate round trip times in milli-seconds:
Minimum = 62ms, Maximum = 140ms, Average = 102ms
Switch1#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 4097
Address 0060.4799.9468
Cost 19
Port 3(FastEthernet0/3)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 00E0.B009.BEE8
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/3 Root FWD 19 128.3 P2p
Fa0/7 Desg FWD 19 128.7 P2p
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 9
Fa0/9 Desg FWD 19 128.9 P2p
Fa0/20 Desg FWD 19 128.20 P2p
7. Thực hiện thay đổi PVST+ sang PVRST+ trên tất cả các Switch. Kiểm tra lại thông tin Spanning-
Tree.
Switch0(config)#spanning-tree mode rapid-pvst
Switch1(config)#spanning-tree mode rapid-pvst
Switch2(config)#spanning-tree mode rapid-pvst
Switch3(config)#spanning-tree mode rapid-pvst
Kiểm tra thông tin Spanning-Tree
Switch1#show spanning-tree
VLAN0001
Spanning tree enabled protocol rstp
Root ID Priority 4097
Address 0060.4799.9468
Cost 19
Port 3(FastEthernet0/3)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 00E0.B009.BEE8
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/3 Root FWD 19 128.3 P2p
Fa0/7 Desg FWD 19 128.7 P2p
Fa0/9 Desg FWD 19 128.9 P2p
Fa0/20 Desg FWD 19 128.20 P2p
CCNA Lab Lab 14 – SPANNING TREE PROTOCOL
Instructor: Tran Dang Minh Khoa CCIE wr ( R&S) – [email protected] Page 10
8. Lưu cấu hình.
Switch0#wr
Building configuration...
[OK]
Switch1#wr
Building configuration...
[OK]
Switch2#wr
Building configuration...
[OK]
Switch3#wr
Building configuration...
[OK]