1-4 Semester 8 Internetwork Troubleshooting v1.0 - Lab 5.3.7 Copyright 2001, Cisco Systems, Inc.
Lab 5.3.7 EtherchannelMisconfigurationTroubleshooting
2/3 Fast0/1
Fa 0/12
Trunk 802.1q
Crossover
Connection
ALSwitch
10.1.1.3
2900XL-Ent
DLSwitch
10.1.1.2
4006 L3
Client
10.1.10.2/24
DLRouter
10.1.1.1
VLAN 1 Network : 10.1.1.0/24
VLAN 1 Gateway : 10.1.1.1
VLAN 10 Network : 10.1.10.0/24
VLAN 10 Gateway : 10.1.10.1
Objective
Switch management includes the ability to communicate to all switches through
a routed environment. This requires that all switches be properly configured
with the necessary TCP/IP settings. Some networks want no VLAN 1 access
from non-VLAN 1 hosts and some networks require management access to
VLAN 1 from any other VLAN using access-lists to control who may have ac-
cess to VLAN 1 from other VLAN’s.
Scenario
As the Enterprise Network Administrator, you have a medium switched net-
work. The network is functioning well. Network administrator workstations are
located on VLAN 1. This VLAN is used to manage network switches and
routers. Administrators would like to administrate the network devices from
VLAN 10 so you change their access switch ports to VLAN10 and their work-
station IP addresses. They report they are unable to communicate to any
devices on VLAN 1 from VLAN 10 except the DLRouter at 10.1.1.1.
Lab Tasks
Cable the lab as shown in the diagram.
Clear the DLRouter configuration using the following commands:
Router#erase start
Erasing the nvram filesystem will remove all files! Continue? [confirm]y[OK]
Erase of nvram: complete
Router#reload
Proceed with reload? [confirm]y
Clear the DLSwitch configuration using the following commands:
Console> (enable) clear config all
This command will clear all configurations in NVRAM.
This command will cause ifIndex to be reassigned on the next system startup.
2-4 Semester 8 Internetwork Troubleshooting v1.0 - Lab 5.3.7 Copyright 2001, Cisco Systems, Inc.
Do you want to continue (y/n) [n]? y
2001 Jun 16 12:29:45 %PAGP-5-PORTFROMSTP:Port 2/1 left bridge port 2/1
.2001 Jun 16 12:29:45 %PAGP-5-PORTFROMSTP:Port 2/2 left bridge port 2/2
2001 Jun 16 12:29:45 %PAGP-5-PORTFROMSTP:Port 2/3 left bridge port 2/3
Console> (enable) reset
This command will reset the system.
Do you want to continue (y/n) [n]? y
Clear the ALSwitch configuration and VLAN database using the following com-
mands:
ALSwitch#clear start
Erasing the nvram filesystem will remove all files! Continue? [confirm]y[OK]
Erase of nvram: complete
ALSwitch#delete vlan.dat
Delete filename [vlan.dat]?
Delete flash:vlan.dat? [confirm]y
ALSwitch#reload
Proceed with reload? [confirm]y
Load the configuration file called Lab5-3-7-DLRouterBrokenConfig.txt into
the DLRouter router.
Load the file called Lab5-3-7-DLSwitchBrokenConfig.txt into the DLSwitch
switch.
Load the file called Lab5-3-7-ALSwitchBrokenConfig.txt into the ALSwitch
switch.
Configure the client with the ip address, default gateway, and subnet mask
listed in the diagram.
Step 1
Define your problem. From the management workstation ping all interfaces on
VLAN 1 and VLAN 10.
Step 2
Gather the Facts.
Based on the current information you have, issue the following commands to
narrow down your possibilities.
Console into each device and ping the interfaces on VLAN1 and VLAN10.
Ping from the ALSwitch.
ALSwitch#ping 10.1.10.1
3-4 Semester 8 Internetwork Troubleshooting v1.0 - Lab 5.3.7 Copyright 2001, Cisco Systems, Inc.
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/202/1001 ms
ALSwitch#ping 10.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/6/26 ms
ALSwitch#ping 10.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 5/9/11 ms
ALSwitch#ping 10.1.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.10.2, timeout is 2 seconds:
Success rate is 0 percent (0/5)
Ping from the DLSwitch.
DLSwitch> (enable) ping 10.1.10.2
10.1.10.2 PING Statistics
5 packets transmitted, 0 packets received, 100% packet loss
DLSwitch> (enable) ping 10.1.1.2
!!!!!
10.1.1.2 PING Statistics
5 packets transmitted, 5 packets received, 0% packet loss
round-trip (ms) min/avg/max = 1/2/7
DLSwitch> (enable) ping 10.1.1.1
!!!!!
10.1.1.1 PING Statistics
5 packets transmitted, 5 packets received, 0% packet loss
round-trip (ms) min/avg/max = 6/7/8
DLSwitch> (enable) ping 10.1.10.1
!!!!!
10.1.10.1 PING Statistics
5 packets transmitted, 5 packets received, 0% packet loss
round-trip (ms) min/avg/max = 7/8/12
Ping from the DLRouter.
DLRouter#ping 10.1.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/8 ms
DLRouter#ping 10.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/8/12 ms
DLRouter#ping 10.1.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.10.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
4-4 Semester 8 Internetwork Troubleshooting v1.0 - Lab 5.3.7 Copyright 2001, Cisco Systems, Inc.
Step 3
Based on your observations there appears to be a problem with communica-
tions to/from the management workstation. So the problem appears to be at the
router.
Step 4
List the possible causes of this problem. Use the information you have and your
knowledge of switches and routers to isolate the problem.
Step 5
Create an Action Plan.
Step 6
Implement the Action Plan.
Step 7
Observe the Results of the Action Plan.
Step 8
Document your work.
. Semester 8 Internetwork Troubleshooting v1.0 - Lab 5.3.7 Copyright 2001, Cisco Systems, Inc.
Lab 5.3.7 Etherchannel Misconfiguration Troubleshooting
2/3. to be reassigned on the next system startup.
2-4 Semester 8 Internetwork Troubleshooting v1.0 - Lab 5.3.7 Copyright 2001, Cisco Systems, Inc.
Do you