It's a good idea to spend some time looking at this topology and its configuration. See why things are working and the way they were designed. I'll be uploading different labs with troubleshooting tickets later for you.

An international toy store company needs your help. They use BGP to exchange routing information between their sites but everytime one of their IBGP routers fails they have connectivity issues. Let's see if you can help them out!

Goal:

• All IP addresses have been preconfigured for you.
• Configure EBGP between AS 1 and AS 2.
• Configure EBGP between AS 2 and AS 3.
• Configure router Pegasus to advertise network 2.2.2.0 /24 in BGP.
• Configure router Phoenix to advertise network 1.1.1.0 /24 in BGP.
• Configure router Pegasus so it does no longer advertise network 2.2.2.0 /24 when network 1.1.1.0 /24 is no longer reachable.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=lqpTUHu3j9o

Mystical Corporation is using OSPF within their autonomous system. Their network is configured using different areas which seems to be working fine. One of the network engineers configured a summary for area 0 but it seems it's not working, up to you to solve the problem.

Goal:

• All IP addresses have been preconfigured for you as specified in the topology picture.
• OSPF is preconfigured with the areas as specified in the topology picture.
• Do not use show run! (this will spoil the fun :) use the appropiate 'show' and 'debug' commands. This will teach you the skills needed to become a true troubleshooting master.
• Configure the network so you have full connectivity, make sure you use the areas as seen in the topology picture.
• Configure a summary on router Chimaera for the two loopback interfaces of router Cerberus. Ensure the summary is as specific as possible. The summary should show up as a interarea router, not as an external route.
• Ensure router Cyclops only sees the summary and not the specific routes.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=pIVOJqnawzQ

The mystical creature corporation has a large international network of fantasy enthusiastics people sharing new mystical rumors. They are running BGP to exchange routing information between each other. At some point in the network you are aggregating a number of prefixes but a downside of this that you are unable to use traffic engineering. Let's see what solution you can come up with.

Goal:

• All IP addresses have been preconfigured for you.
• Configure IBGP within AS 3.
• Configure EBGP between AS 2 and AS 3.
• Configure EBGP between AS 1 and AS 2.
• Configure router Blob to advertise all loopback interfaces in BGP.
• Configure BGP aggregation on router Behemoth to summarize the loopback interfaces in the most optimal summary towards AS 3.
• Configure the network so AS 3 sends traffic to network 172.16.0.0 /24 through router Banshee.
• Configure the network so AS 3 sends traffic to network 172.16.1.0 /24 through router BigFoot.
• You are not allowed to use static, default routes or any IGP. Do not remove the summary on router Behemoth.
• You are not allowed to use any BGP communities or attributes.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=T9A_tP2vlVg

You are the senior network engineer working at a major frame relay ISP somewhere in Europe. One of your customers requests the company to run authentication over their frame relay connections and they would also like to see fragmentation. You know there is no way to do authentication with frame-relay so you decide to bundle their PVCs in a multilink PPP setup.

Goals:

• There are two PVCs using DLCI 102 + 201 and DLCI 112 + 211.
• Configure Multilink PPP to run over both PVCs. Use network 192.168.12.0 /24.
• Ensure packets will be fragmented on both serial links.
• Configure CHAP authentication for the PPP Multilink configuration.
• Ensure both routers can reach each others loopback0 interfaces through the PPP Multilink.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=U6iM3jM_gVI

You are responsible for the frame relay and multicast configuration within the network. You use a lot of hub and spoke topologies and up to now you haven't seen any problems. Yesterday one of your customers called claiming they are having some problems. There is a videostation behind one of the spoke routers streaming video using multicast. It seems one of the other spoke routers is unable to receive this stream...let's see what you can do.

Goal:

• All IP addresses have been preconfigured for you as specified in the topology picture.
• OSPF is preconfigured for full connectivity.
• Do not use show run! (this will spoil the fun :) use the appropiate 'show' and 'debug' commands. This will teach you the skills needed to become a true troubleshooting master.
• Start a ping on router SpokeA to IP address 224.9.9.9 to generate multicast traffic.
• Configure the network so router Receiver can receive this multicast traffic.
• You are not allowed to make any changes to the frame-relay network or change the PIM mode.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to be able to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=KrXrh46Cqp4

Garden Tools inc. has some trouble with their network. Every now and then the serial link fails which results in flapping networks for their routing protocol EIGRP. You want to configure damping so this is no issue anymore.

Goal:

• All IP addresses have been preconfigured for you.
• Configure EIGRP AS 1 and achieve full connectivity.
• Configure dampening on router Spray so whenever the serial link fails the route will not be advertised in EIGRP for 20 seconds. It shouldn't be dampened for more than 40 seconds.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=63BLfPjJWj0

You are responsible for the network of a major internation hotel organization. You make sure that all the guests can use the Internet services. One of the things you need to do is ensure DNS lookups can be done quickly without relying too much on external DNS servers. You decide to use one of your routers for the job...

Goal:

• All IP addresses have been preconfigured for you.
• OSPF has been preconfigured for full connectivity.
• Configure router PRIMARY as the primary DNS server for domain "vault.local". This router should use hostname ns1.vault.local.
• Configure router SECONDARY as the secondary DNS server for domain "vault.local". This router should use hostname ns2.vault.local.
• Router CLIENT1 should be able to resolve the hostnames of the DNS servers.
• Router CLIENT1 should use both DNS servers by using round-robin.
• Router CLIENT2 should do DNS lookups by using CLIENT1.
• Configure a loopback0 interface on router CLIENT1 with IP address 3.3.3.3 /24.
• Configure the network so CLIENT1 responds with IP address 3.3.3.3 as a DNS response when the DNS servers are unreachable.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=hMB5iRv_Kjk

You are the senior network engineer for a large online webshop called "Booky Wooky". One of your load balancers recently failed and you don't have any replacement...business hasn't been so good since the ereaders have been launched a few years ago. You decide to take a spare router and configure it for load balancing...

Goal:

• All IP addresses have been preconfigured for you.
• Configure router SLB so it spreads connections to the webserver in a round-robin fashion to router WWW1 and WWW2.
• Configure router SLB so WWW1 gets twice as many connections as WWW2.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=J9sEB2kOqLw

Many users on your network are using the Internet but the connection you have from the ISP is quite expensive. You want to get the most out of your connection and ensure users don't load pages from the Internet that have been loaded previously. You decide to implement a web cache server using WCCP v1. Let's see if you can configure the router to support this.

Goal:

• All IP addresses have been preconfigured for you.
• Router "webcache" is a fictional web cache server, we can still practice the commands needed for WCCPv1 with this lab.
• Configure router "redirector" so it redirects packet for web caching to router "webcache".
• Configure a loopback0 interface on router "client" with IP address 1.1.1.1 /24.
• Configure router "redirector" so it excludes redirection from network 1.1.1.0 /24.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Video Solution:

http://www.youtube.com/watch?v=4_xEqrSGj2A