4.2.2.4 Lab – Troubleshooting EtherChannel - Answers

Certification Answers

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

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
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
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

#buttons=(Accept !) #days=(20)

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