4.2.2.4 Lab – Troubleshooting EtherChannel (Instructor Version)
Instructor Note: Red font color or Gray highlights indicate text that appears in the instructor copy only.
Topology
Addressing Table
| Device | Interface | IP Address | Subnet Mask |
|---|---|---|---|
| S1 | VLAN 99 | 192.168.1.11 | 255.255.255.0 |
| S2 | VLAN 99 | 192.168.1.12 | 255.255.255.0 |
| S3 | VLAN 99 | 192.168.1.13 | 255.255.255.0 |
| PC-A | NIC | 192.168.0.2 | 255.255.255.0 |
| PC-C | NIC | 192.168.0.3 | 255.255.255.0 |
VLAN Assignments
| VLAN | Name |
|---|---|
| 10 | User |
| 99 | Management |
Objectives
Part 1: Build the Network and Load Device Configurations
Part 2: Troubleshoot EtherChannel
Background / Scenario
The switches at your company were configured by an inexperienced network administrator. Several errors in the configuration have resulted in speed and connectivity issues. Your manager has asked you to troubleshoot and correct the configuration errors and document your work. Using your knowledge of EtherChannel and standard testing methods, find and correct the errors. Ensure that all of the EtherChannels use Port Aggregation Protocol (PAgP), and that all hosts are reachable.
Note: The switches used are Cisco Catalyst 2960s with Cisco IOS Release 15.0(2) (lanbasek9 image). Other switches and Cisco IOS versions can be used. Depending on the model and Cisco IOS version, the commands available and output produced might vary from what is shown in the labs.
Note: Make sure that the switches have been erased and have no startup configurations. If you are unsure, contact your instructor.
Instructor Note: Refer to the Instructor Lab Manual for the procedures to initialize and reload devices.
Required Resources
- 3 Switches (Cisco 2960 with Cisco IOS Release 15.0(2) lanbasek9 image or comparable)
- 2 PCs (Windows 7, Vista, or XP with a terminal emulation program, such as Tera Term)
- Console cables to configure the Cisco IOS devices via the console ports
- Ethernet cables as shown in the topology
Part 1: Build the Network and Load Device Configurations
In Part 1, you will set up the network topology, configure basic settings on the PC hosts, and load configurations on the switches.
Step 1: Cable the network as shown in the topology.
Step 2: Configure the PC hosts.
Step 3: Erase the startup and VLAN configurations and reload the switches.
Step 4: Load switch configurations.
Load the following configurations into the appropriate switch. All switches have the same passwords. The privileged EXEC password is class. The password for console and vty access is cisco. As all switches are Cisco devices, the network administrator decided to use Cisco’s PAgP on all port channels configured with EtherChannel. Switch S2 is the root bridge for all VLANs in the topology.
Switch S1 Configuration:
hostname S1 interface range f0/1-24, g0/1-2 shutdown exit enable secret class no ip domain lookup line vty 0 15 password cisco login line con 0 password cisco logging synchronous login exit vlan 10 name User vlan 99 Name Management interface range f0/1-2 switchport mode trunk ! channel-group 1 mode desirable channel-group 1 mode active switchport trunk native vlan 99 no shutdown interface range f0/3-4 channel-group 2 mode desirable switchport trunk native vlan 99 ! switchport mode trunk no shutdown interface f0/6 switchport mode access switchport access vlan 10 no shutdown interface vlan 99 ip address 192.168.1.11 255.255.255.0 interface port-channel 1 switchport trunk native vlan 99 switchport mode trunk interface port-channel 2 switchport trunk native vlan 99 switchport mode access ! switchport mode trunk
Switch S2 Configuration:
hostname S2 interface range f0/1-24, g0/1-2 shutdown exit enable secret class no ip domain lookup line vty 0 15 password cisco login line con 0 password cisco logging synchronous login exit vlan 10 name User vlan 99 name Management spanning-tree vlan 1,10,99 root primary interface range f0/1-2 switchport mode trunk channel-group 1 mode desirable switchport trunk native vlan 99 no shutdown interface range f0/3-4 switchport mode trunk channel-group 3 mode desirable switchport trunk native vlan 99 ! no shutdown interface vlan 99 ip address 192.168.1.12 255.255.255.0 interface port-channel 1 switchport trunk native vlan 99 switchport trunk allowed vlan 1,99 ! switchport trunk allowed 1,10,99 interface port-channel 3 switchport trunk native vlan 99 switchport trunk allowed vlan 1,10,99 switchport mode trunk
Switch S3 Configuration:
hostname S3 interface range f0/1-24, g0/1-2 shutdown exit enable secret class no ip domain lookup line vty 0 15 password cisco login line con 0 password cisco logging synchronous login exit vlan 10 name User vlan 99 name Management interface range f0/1-2 ! switchport mode trunk ! channel-group 3 mode desirable ! switchport trunk native vlan 99 ! no shutdown interface range f0/3-4 switchport mode trunk ! channel-group 2 mode desirable channel-group 3 mode desirable switchport trunk native vlan 99 no shutdown interface f0/18 switchport mode access switchport access vlan 10 no shutdown interface vlan 99 ip address 192.168.1.13 255.255.255.0 ! interface port-channel 2 ! switchport trunk native vlan 99 ! switchport mode trunk interface port-channel 3 switchport trunk native vlan 99 switchport mode trunk
Step 5: Save your configuration.
Part 2: Troubleshoot EtherChannel
In Part 2, you must examine the configurations on all switches, make corrections if needed, and verify full functionality.
Step 1: Troubleshoot S1.
a. Use the show interfaces trunk command to verify that the port channels are functioning as trunk ports.
S1# show interfaces trunk
Port Mode Encapsulation Status Native vlan
Fa0/1 on 802.1q trunking 99
Fa0/2 on 802.1q trunking 99
Port Vlans allowed on trunk
Fa0/1 1-4094
Fa0/2 1-4094
Port Vlans allowed and active in management domain
Fa0/1 1,10,99
Fa0/2 1,10,99
Port Vlans in spanning tree forwarding state and not pruned
Fa0/1 none
Fa0/2 none
Do port channels 1 and 2 appear as trunked ports? _____No
b. Use the show etherchannel summary command to verify that interfaces are configured in the correct port channel, the proper protocol is configured, and the interfaces are in use.
S1# show etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 2
Number of aggregators: 2
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SD) LACP Fa0/1(I) Fa0/2(I)
2 Po2(SD) PAgP Fa0/3(I) Fa0/4(I)
Based on the output, are there any EtherChannel issues? If issues are found, record them in the space provided below.
_________________________________________________
Yes. Port Channel 1 is configured with the Link Aggregation Control Protocol (LACP), and the ports in Port Channel 2 are functioning independently (I = stand-alone).
c. Use the command show run | begin interface Port-channel command to view the running configuration beginning with the first port channel interface.
S1# show run | begin interface Port-channel
interface Port-channel1
switchport trunk native vlan 99
switchport mode trunk
!
interface Port-channel2
switchport trunk native vlan 99
switchport mode access
!
interface FastEthernet0/1
switchport trunk native vlan 99
switchport mode trunk
channel-group 1 mode active
!
interface FastEthernet0/2
switchport trunk native vlan 99
switchport mode trunk
channel-group 1 mode active
!
interface FastEthernet0/3
switchport trunk native vlan 99
switchport mode access
channel-group 2 mode desirable
!
interface FastEthernet0/4
switchport trunk native vlan 99
switchport mode access
channel-group 2 mode desirable
!
interface FastEthernet0/5
shutdown
!
interface FastEthernet0/6
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/7
shutdown
!
<output omitted>
d. Resolve all problems found in the outputs from the previous show commands. Record the commands used to correct the configurations.
___________________________________________________
S1(config)# interface range f0/1-2 S1(config-if-range)# no channel-group 1 mode active S1(config-if-range)# channel-group 1 mode desirable S1(config-if-range)# exit S1(config)# interface port-channel 2 S1(config-if)# switchport mode trunk
e. Use the show interfaces trunk command to verify trunk settings.
S1# show interfaces trunk
Port Mode Encapsulation Status Native vlan
Po1 on 802.1q trunking 99
Po2 on 802.1q trunking 99
Port Vlans allowed on trunk
Po1 1-4094
Po2 1-4094
Port Vlans allowed and active in management domain
Po1 1,10,99
Po2 1,10,99
Port Vlans in spanning tree forwarding state and not pruned
Po1 1,10,99
Po2 1,10,99
f. Use the show etherchannel summary command to verify that the port channels are up and in use.
S1# show etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 2
Number of aggregators: 2
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SU) PAgP Fa0/1(P) Fa0/2(P)
2 Po2(SU) PAgP Fa0/3(P) Fa0/4(P)
Step 2: Troubleshoot S2.
a. Issue the command to verify that the port channels are functioning as trunk ports. Record the command used in the space provided below.
_________________________________________________
S2# show interfaces trunk
S2# show interfaces trunk
Port Mode Encapsulation Status Native vlan
Po1 on 802.1q trunking 99
Port Vlans allowed on trunk
Po1 1,99
Port Vlans allowed and active in management domain
Po1 1,99
Port Vlans in spanning tree forwarding state and not pruned
Po1 1,99
Based on the output, are there any issues with the configurations? If issues are found, record them in the space provided below.
_____________________________________________________
Port Channel 3 is not present in the output, and VLAN 10 is not allowed in Port Channel 1.
b. Issue the command to verify that interfaces are configured in the correct port channel and the proper protocol is configured.
S2# show etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 2
Number of aggregators: 2
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SU) PAgP Fa0/1(P) Fa0/2 (P)
3 Po3(SD) PAgP Fa0/3(D) Fa0/4(D)
Based on the output, are there any EtherChannel issues? If issues are found, record them in the space provided below.
__________________________________________________
Yes. Port Channel 3 is down.
c. Use the command show run | begin interface Port-channel to view the running configuration beginning with the first port-channel interface.
S2# show run | begin interface Port-channel
interface Port-channel1
switchport trunk native vlan 99
switchport trunk allowed vlan 1,99
switchport mode trunk
!
interface Port-channel3
switchport trunk native vlan 99
switchport trunk allowed vlan 1,10,99
switchport mode trunk
!
interface FastEthernet0/1
switchport trunk native vlan 99
switchport trunk allowed vlan 1,99
switchport mode trunk
channel-group 1 mode desirable
!
interface FastEthernet0/2
switchport trunk native vlan 99
switchport trunk allowed vlan 1,99
switchport mode trunk
channel-group 1 mode desirable
!
interface FastEthernet0/3
switchport trunk native vlan 99
switchport trunk allowed vlan 1,10,99
switchport mode trunk
shutdown
channel-group 3 mode desirable
!
interface FastEthernet0/4
switchport trunk native vlan 99
switchport trunk allowed vlan 1,10,99
switchport mode trunk
shutdown
channel-group 3 mode desirable
!
interface FastEthernet0/5
shutdown
!
interface FastEthernet0/6
shutdown
!
<output omitted>
d. Resolve all problems found in the outputs from the previous show commands. Record the commands used to correct the configuration.
_______________________________________________
S2(config)# interface range f0/3-4 S2(config-if-range)# no shutdown S2(config-if-range)# exit S2(config)# interface port-channel 1 S2(config-if)# switchport trunk allowed vlan 1,10,99
e. Issue the command to verify trunk settings.
S2# show interfaces trunk
Port Mode Encapsulation Status Native vlan
Po1 on 802.1q trunking 99
Port Vlans allowed on trunk
Po1 1,10,99
Port Vlans allowed and active in management domain
Po1 1,10,99
Port Vlans in spanning tree forwarding state and not pruned
Po1 1,10,99
f. Issue the command to verify that the port channels are functioning. Remember that port channel issues can be caused by either end of the link.
S2# show etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 2
Number of aggregators: 2
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SU) PAgP Fa0/1(P) Fa0/2(P)
3 Po3(SD) PAgP Fa0/3(D) Fa0/4(D)
Step 3: Troubleshoot S3.
a. Issue the command to verify that the port channels are functioning as trunk ports.
S3# show interfaces trunk
Port Mode Encapsulation Status Native vlan
Po3 on 802.1q trunking 99
Port Vlans allowed on trunk
Po3 1-4094
Port Vlans allowed and active in management domain
Po3 1,10,99
Port Vlans in spanning tree forwarding state and not pruned
Po3 1,10,99
Based on the output, are there any issues with the configurations? If issues are found, record them in the space provided below.
_____________________________________________________
Port Channel 2 is not present in the output.
b. Issue the command to verify that the interfaces are configured in the correct port channel and that the proper protocol is configured.
S3# show etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
3 Po3(SU) PAgP Fa0/3(P) Fa0/4(P)
Based on the output, are there any EtherChannel issues? If issues are found, record them in the space provided below.
_______________________________________________________
Port Channel 2 is not present, and Port Channel 3 is incorrectly configured for interfaces f0/3 and f0/4.
c. Use the command show run | begin interface Port-channel command to view the running configuration beginning with the first port channel interface.
S3# show run | begin interface Port-channel
interface Port-channel3
switchport trunk native vlan 99
switchport mode trunk
!
interface FastEthernet0/1
shutdown
!
interface FastEthernet0/2
shutdown
!
interface FastEthernet0/3
switchport trunk native vlan 99
switchport mode trunk
channel-group 3 mode desirable
!
interface FastEthernet0/4
switchport trunk native vlan 99
switchport mode trunk
channel-group 3 mode desirable
!
interface FastEthernet0/5
shutdown
!
interface FastEthernet0/6
shutdown
!
<output omitted>
d. Resolve all problems found. Record the commands used to correct the configuration.
_______________________________________________________
S3(config)# interface range f0/3-4
S3(config-if-range)# channel-group 2 mode desirable
S3(config-if-range)# interface range f0/1-2
S3(config-if-range)# switchport mode trunk
S3(config-if-range)# switchport trunk native vlan 99
S3(config-if-range)# channel-group 3 mode desirable
S3(config-if-range)# no shutdown
e. Issue the command to verify trunk settings. Record the command used in the space provided below.
_____________________________________________________
S3# show interfaces trunk
S3# show interfaces trunk
Port Mode Encapsulation Status Native vlan
Po2 on 802.1q trunking 99
Po3 on 802.1q trunking 99
Port Vlans allowed on trunk
Po2 1-4094
Po3 1-4094
Port Vlans allowed and active in management domain
Po2 1,10,99
Po3 1,10,99
Port Vlans in spanning tree forwarding state and not pruned
Po2 1,10,99
Po3 1,10,99
f. Issue the command to verify that the port channels are functioning. Record the command used in the space provided below.
_____________________________________________________
S3# show etherchannel summary
S3# show etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 2
Number of aggregators: 2
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
2 Po2(SU) PAgP Fa0/3(P) Fa0/4(P)
3 Po3(SU) PAgP Fa0/1(P) Fa0/2(P)
Step 4: Verify EtherChannel and Connectivity.
a. Use the show interfaces etherchannel command to verify full functionality of the port channels.
S1# show interfaces etherchannel
----
FastEthernet0/1:
Port state = Up Mstr In-Bndl
Channel group = 1 Mode = Desirable-Sl Gcchange = 0
Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1
Port index = 0 Load = 0x00 Protocol = PAgP
Flags: S - Device is sending Slow hello. C - Device is in Consistent state.
A - Device is in Auto mode. P - Device learns on physical port.
d - PAgP is down.
Timers: H - Hello timer is running. Q - Quit timer is running.
S - Switching timer is running. I - Interface timer is running.
Local information:
Hello Partner PAgP Learning Group
Port Flags State Timers Interval Count Priority Method Ifindex
Fa0/1 SC U6/S7 H 30s 1 128 Any 5001
Partner's information:
Partner Partner Partner Partner Group
Port Name Device ID Port Age Flags Cap.
Fa0/1 S2 0cd9.96e8.6f80 Fa0/1 23s SC 10001
Age of the port in the current state: 0d:00h:38m:38s
----
FastEthernet0/2:
Port state = Up Mstr In-Bndl
Channel group = 1 Mode = Desirable-Sl Gcchange = 0
Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1
Port index = 0 Load = 0x00 Protocol = PAgP
Flags: S - Device is sending Slow hello. C - Device is in Consistent state.
A - Device is in Auto mode. P - Device learns on physical port.
d - PAgP is down.
Timers: H - Hello timer is running. Q - Quit timer is running.
S - Switching timer is running. I - Interface timer is running.
Local information:
Hello Partner PAgP Learning Group
Port Flags State Timers Interval Count Priority Method Ifindex
Fa0/2 SC U6/S7 H 30s 1 128 Any 5001
Partner's information:
Partner Partner Partner Partner Group
Port Name Device ID Port Age Flags Cap.
Fa0/2 S2 0cd9.96e8.6f80 Fa0/2 7s SC 10001
Age of the port in the current state: 0d:00h:38m:38s
----
FastEthernet0/3:
Port state = Up Mstr In-Bndl
Channel group = 2 Mode = Desirable-Sl Gcchange = 0
Port-channel = Po2 GC = 0x00020001 Pseudo port-channel = Po2
Port index = 0 Load = 0x00 Protocol = PAgP
Flags: S - Device is sending Slow hello. C - Device is in Consistent state.
A - Device is in Auto mode. P - Device learns on physical port.
d - PAgP is down.
Timers: H - Hello timer is running. Q - Quit timer is running.
S - Switching timer is running. I - Interface timer is running.
Local information:
Hello Partner PAgP Learning Group
Port Flags State Timers Interval Count Priority Method Ifindex
Fa0/3 SC U6/S7 H 30s 1 128 Any 5002
Partner's information:
Partner Partner Partner Partner Group
Port Name Device ID Port Age Flags Cap.
Fa0/3 S3 0cd9.96d2.5100 Fa0/3 5s SC 20001
Age of the port in the current state: 0d:00h:28m:48s
----
FastEthernet0/4:
Port state = Up Mstr In-Bndl
Channel group = 2 Mode = Desirable-Sl Gcchange = 0
Port-channel = Po2 GC = 0x00020001 Pseudo port-channel = Po2
Port index = 0 Load = 0x00 Protocol = PAgP
Flags: S - Device is sending Slow hello. C - Device is in Consistent state.
A - Device is in Auto mode. P - Device learns on physical port.
d - PAgP is down.
Timers: H - Hello timer is running. Q - Quit timer is running.
S - Switching timer is running. I - Interface timer is running.
Local information:
Hello Partner PAgP Learning Group
Port Flags State Timers Interval Count Priority Method Ifindex
Fa0/4 SC U6/S7 H 30s 1 128 Any 5002
Partner's information:
Partner Partner Partner Partner Group
Port Name Device ID Port Age Flags Cap.
Fa0/4 S3 0cd9.96d2.5100 Fa0/4 6s SC 20001
Age of the port in the current state: 0d:00h:28m:48s
----
Port-channel1:
Age of the Port-channel = 0d:00h:57m:52s
Logical slot/port = 2/1 Number of ports = 2
GC = 0x00010001 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = PAgP
Port security = Disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Fa0/1 Desirable-Sl 0
0 00 Fa0/2 Desirable-Sl 0
Time since last port bundled: 0d:00h:38m:38s Fa0/1
Time since last port Un-bundled: 0d:00h:42m:15s Fa0/2
----
Port-channel2:
Age of the Port-channel = 0d:00h:57m:48s
Logical slot/port = 2/2 Number of ports = 2
GC = 0x00020001 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = PAgP
Port security = Disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Fa0/3 Desirable-Sl 0
0 00 Fa0/4 Desirable-Sl 0
Time since last port bundled: 0d:00h:28m:48s Fa0/4
Time since last port Un-bundled: 0d:00h:28m:51s Fa0/4
b. Verify connectivity of the management VLAN.
Can S1 ping S2? _____Yes
Can S1 ping S3? _____Yes
Can S2 ping S3? _____Yes
c. Verify connectivity of PCs.
Can PC-A ping PC-C? ____Yes
If EtherChannels are not fully functional, connectivity between switches does not exist, or connectivity between hosts does not exist. Troubleshoot to resolve any remaining issues.
Note: It may be necessary to disable the PC firewall for pings between the PCs to succeed.
Device Configs – Final
Switch S1
S1#show run Building configuration... Current configuration : 2241 bytes ! version 15.0 no service pad service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname S1 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model system mtu routing 1500 ! no ip domain-lookup ! spanning-tree mode pvst spanning-tree extend system-id ! vlan internal allocation policy ascending ! interface Port-channel1 switchport trunk native vlan 99 switchport mode trunk ! interface Port-channel2 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/1 switchport trunk native vlan 99 switchport mode trunk channel-group 1 mode desirable ! interface FastEthernet0/2 switchport trunk native vlan 99 switchport mode trunk channel-group 1 mode desirable ! interface FastEthernet0/3 switchport trunk native vlan 99 switchport mode trunk channel-group 2 mode desirable ! interface FastEthernet0/4 switchport trunk native vlan 99 switchport mode trunk channel-group 2 mode desirable ! interface FastEthernet0/5 shutdown ! interface FastEthernet0/6 switchport access vlan 10 switchport mode access ! interface FastEthernet0/7 shutdown ! interface FastEthernet0/8 shutdown ! interface FastEthernet0/9 shutdown ! interface FastEthernet0/10 shutdown ! interface FastEthernet0/11 shutdown ! interface FastEthernet0/12 shutdown ! interface FastEthernet0/13 shutdown ! interface FastEthernet0/14 shutdown ! interface FastEthernet0/15 shutdown ! interface FastEthernet0/16 shutdown ! interface FastEthernet0/17 shutdown ! interface FastEthernet0/18 shutdown ! interface FastEthernet0/19 shutdown ! interface FastEthernet0/20 shutdown ! interface FastEthernet0/21 shutdown ! interface FastEthernet0/22 shutdown ! interface FastEthernet0/23 shutdown ! interface FastEthernet0/24 shutdown ! interface GigabitEthernet0/1 shudown ! interface GigabitEthernet0/2 shudown ! interface Vlan1 no ip address ! interface Vlan99 ip address 192.168.1.11 255.255.255.0 ! ip http server ip http secure-server ! line con 0 password cisco logging synchronous login line vty 0 4 password cisco login line vty 5 15 password cisco login ! end
Switch S2
S2#show run Building configuration... Current configuration : 2476 bytes ! version 15.0 no service pad service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname S2 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model system mtu routing 1500 ! no ip domain-lookup ! spanning-tree mode pvst spanning-tree extend system-id spanning-tree vlan 1,10,99 priority 24576 ! vlan internal allocation policy ascending ! interface Port-channel1 switchport trunk native vlan 99 switchport trunk allowed vlan 1,10,99 switchport mode trunk ! interface Port-channel3 switchport trunk native vlan 99 switchport trunk allowed vlan 1,10,99 switchport mode trunk ! interface FastEthernet0/1 switchport trunk native vlan 99 switchport trunk allowed vlan 1,10,99 switchport mode trunk channel-group 1 mode desirable ! interface FastEthernet0/2 switchport trunk native vlan 99 switchport trunk allowed vlan 1,10,99 switchport mode trunk channel-group 1 mode desirable ! interface FastEthernet0/3 switchport trunk native vlan 99 switchport trunk allowed vlan 1,10,99 switchport mode trunk channel-group 3 mode desirable ! interface FastEthernet0/4 switchport trunk native vlan 99 switchport trunk allowed vlan 1,10,99 switchport mode trunk channel-group 3 mode desirable ! interface FastEthernet0/5 shutdown ! interface FastEthernet0/6 shutdown ! interface FastEthernet0/7 shutdown ! interface FastEthernet0/8 shutdown ! interface FastEthernet0/9 shutdown ! interface FastEthernet0/10 shutdown ! interface FastEthernet0/11 shutdown ! interface FastEthernet0/12 shutdown ! interface FastEthernet0/13 shutdown ! interface FastEthernet0/14 shutdown ! interface FastEthernet0/15 shutdown ! interface FastEthernet0/16 shutdown ! interface FastEthernet0/17 shutdown ! interface FastEthernet0/18 shutdown ! interface FastEthernet0/19 shutdown ! interface FastEthernet0/20 shutdown ! interface FastEthernet0/21 shutdown ! interface FastEthernet0/22 shutdown ! interface FastEthernet0/23 shutdown ! interface FastEthernet0/24 shutdown ! interface GigabitEthernet0/1 shudown ! interface GigabitEthernet0/2 shudown ! interface Vlan1 no ip address ! interface Vlan99 ip address 192.168.1.12 255.255.255.0 ! ip http server ip http secure-server ! line con 0 password cisco logging synchronous login line vty 0 4 password cisco login line vty 5 15 password cisco login ! end
Switch S3
S3#show run Building configuration... Current configuration : 2239 bytes ! version 15.0 no service pad service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname S3 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model system mtu routing 1500 ! no ip domain-lookup ! spanning-tree mode pvst spanning-tree extend system-id ! vlan internal allocation policy ascending ! interface Port-channel2 switchport trunk native vlan 99 switchport mode trunk ! interface Port-channel3 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/1 switchport trunk native vlan 99 switchport mode trunk channel-group 3 mode desirable ! interface FastEthernet0/2 switchport trunk native vlan 99 switchport mode trunk channel-group 3 mode desirable ! interface FastEthernet0/3 switchport trunk native vlan 99 switchport mode trunk channel-group 2 mode desirable ! interface FastEthernet0/4 switchport trunk native vlan 99 switchport mode trunk channel-group 2 mode desirable ! interface FastEthernet0/5 shutdown ! interface FastEthernet0/6 shutdown ! interface FastEthernet0/7 shutdown ! interface FastEthernet0/8 shutdown ! interface FastEthernet0/9 shutdown ! interface FastEthernet0/10 shutdown ! interface FastEthernet0/11 shutdown ! interface FastEthernet0/12 shutdown ! interface FastEthernet0/13 shutdown ! interface FastEthernet0/14 shutdown ! interface FastEthernet0/15 shutdown ! interface FastEthernet0/16 shutdown ! interface FastEthernet0/17 shutdown ! interface FastEthernet0/18 switchport access vlan 10 switchport mode access ! interface FastEthernet0/19 shutdown ! interface FastEthernet0/20 shutdown ! interface FastEthernet0/21 shutdown ! interface FastEthernet0/22 shutdown ! interface FastEthernet0/23 shutdown ! interface FastEthernet0/24 shutdown ! interface GigabitEthernet0/1 shudown ! interface GigabitEthernet0/2 shudown ! interface Vlan1 no ip address ! interface Vlan99 ip address 192.168.1.13 255.255.255.0 ! ip http server ip http secure-server ! line con 0 password cisco logging synchronous login line vty 0 4 password cisco login line vty 5 15 password cisco login ! end