CCNA VLAN Exam Sim Troubleshooting Lab

CCNA VLAN Exam Sim Troubleshooting Lab

This practice Lab is related to "CCNA VLAN Exam Sim". In this lab you have three Cisco Switches with different VLAN configured on these. Your task will be to troubleshoot and find the missing or bad configuration so that the communication between all these switches are possible in required way.

Vlan Lab Question:

A network engineer has built a Layer-2 switched network in a Healthcare IT company. But these are some misconfigurations. You are directed to verify these configurations and fix all the issues  as per company's requirements.

Following are the company's  requirements:

• Your first task is to verify and confirm that all switch ports are assigned with correct VLANs as shown in figure. You need to fix all  misconfiguration in these three Cisco switches
• You need to check the trunk-links between these operational switches & the trunk-encapsulation method IEEE-802.1Q is used. You second task is complete all the trunk configurations and make sure all ports  between switches are configured as trunk-ports

In Exam when you will analyze the configurations you may find the following faults or misconfigurations. 

1. You need to check the Native VLAN configurations, there may be a native-vlan mismatch between SwitCH1 AND Switch3. You need to fix this fault with following configurations

Sw3(config-if)#switchport trunk native vlan 1

You need to match the native-VLAN onboth end, you can use “show int trunk” command on Switch1 to check its native-VLAN.

2. Different Switchport mode on Switches: For making sure the correct trunk configuration you need to check that trunk port on both switch must be configured as trunk. For example first you can check that the E0/0 on SW3 and E0/1 on SW2 must be configured as trunk port. 

SW3, SW2:
interface e0/0
 switchport mode trunk

interface e0/1
 switchport mode trunk

3. Check Access Side with Vlan configurations: You may find 1 port in VLAN 500 while other port in VLAN 600 on SWI and SW2 

SW1, SW2:
interface e0/2
 switchport mode access
 switchport access vlan 500
interface e0/3
 switchport mode access
 switchport access vlan 600

3. Check trunk-encapsulation IEEE-802.1Q configurations: You need to confirm the following correct configurations on SW3:

SW3:
interface e0/0
 switchport trunk encapsulation dot1q
 switchport mode trunk

Learn About New VLANs Virtual Extensible LAN

CCNA EIGRP Exam Lab AS Configuration

CCNA EIGRP Exam Lab AS Configuration 

Question

CCNA EIGRP AS Configuration Exam Lab: Your office has added a new router Router3 to current network. But there is some configuration issue between Router3 and the network, because currently no router is receiving the routing-updates from Router3. All other connectivity like ISP Internet is working fine.

Your task is to recognize the faults in configuration and correct them in a way you get full connectivity between the all networks. All routers have the default password cisco. IP configurations of all devices are as under:

RouteRouter1
S0/0: 192.168.36.13

S1/0: 198.0.18.6
S0/1: 192.168.60.25

Fa0/0: 192.168.77.33

Router2
S0/0: 192.168.36.14

Fa0/0: 192.168.60.97
Fa0/1: 192.168.60.113

Router3
Fa0/1: 192.168.60.65
Fa1/0: 192.168.60.81

Fa0/0: 192.168.77.34

Router4
S0/1: 192.168.60.26

Fa0/0: 192.168.60.129
Fa0/1: 192.168.60.145

Solution and explanation

For troubleshooting the lab you need to check out the configuration on newly added router that is router3. Run the command show RUN on router3. From the output of router3, we find that it is wrongly configured with an autonomous number of 22. If the AS numbers among the connected routers are different then no adjacency will be formed. You also need to make sure that you have the same AS on the entire router in the network.

To correct the configurations, you simply need to re-configure router3 with the correct AS following configurations:

ROUTER3#configure terminal

ROUTER3(config)#no router eigrp 22

ROUTER3(config)#router eigrp 212

ROUTER3(config-router)#network 192.168.60.0

ROUTER3(config-router)#network 192.168.77.0

ROUTER3(config-router)#no auto-summary

ROUTER3(config-router)#end

ROUTER3#copy running-config startup-config

Check configuration on Router1:

You will notice that there is missing network of Router3. Therefore we have to advertise here so that it can accessible on Router3

ROUTER1>enable 

ROUTER1#configure terminal

ROUTER1(config)#router eigrp 212

ROUTER1(config-router)#network 192.168.77.0

ROUTER1(config-router)#end

ROUTER1#copy running-config startup-config

Verification:

After the above configuration you will have the full connectivity. You should check again with ping command from router3 to other routers!

Some new updates in EIRGP lab:

In the above simulation’s configuration if you find the passive-interface configuration in ROUTER1 configuration. If the link between ROUTER1 to Router2 or ROUTER1 to Router3 have the passive interface then we need to remove it. You can use the no passive-interface command because it prevents EIGRP routing updates from being sent on these interfaces. But if the “passive interface” is applied to the link between ROUTER1 and ISP-router in following way:

ROUTER1:

!

.
router eigrp 212
passive-interface s1/0
.

.

Then we don’t need to change anything on ROUTER1 because the link between ROUTER1 & ISP doesn’t need EIGRP to run on it.

There is a static router command ip default-network command in ROUTER1, this is correct so that all the routers can access the Internet.

That all, thank you for reading. Share your comments and CCNA exam experience. Visit some other practice labs for CCNA.

Gns3 1.3 32 bit windows 7 How to download

Gns3 1.3 x 32 bit windows 7 How to download:

Gns3 1.3 x 32 bit Download: Today i download the gns3 after the long time but i shocked to see the message that "This version of GNS3 is not supported on 32 bit editior of windows. Please download GNS3 1.3.x". Then i googled the query and found that there is no more support for 32 bit operating system.


GNS3 is an open source graphical-network=simulator that allows you to design complex network topologies. You can simulate or configure Cisco and other devices like workstations to powerful Cisco routers. GNS3 is based on Dynamips.


I search the "Gns3 1.3 x 32 bit Download" for Download but no link found for download. So Guy if you have old version of GNS3 then please share the link. Or comment how we can try it on windows 7 32 bit.