Information Technology Reference
In-Depth Information
Task 9: Configure Static Routing on ISP
In a real-world implementation of this topology, you would not be configuring the ISP router.
However, your service provider is an active partner in solving your connectivity needs. Service
provider administrators are human, too, and make mistakes. Therefore, it is important that you under-
stand the types of errors an ISP could make that would cause your networks to lose connectivity.
Consider the type of static routing that is needed on ISP.
Step 1.
What networks are present in the ISP routing table? List the networks with slash notation.
209.165.201.0/30
209.165.200.224/27
What networks are missing from the ISP routing table? List the networks with slash nota-
tion.
192.168.2.64/26
192.168.2.128/26
192.168.2.192/26
Can one summary route that includes all the missing networks be created?
yes
Configure ISP with a summary static route.
Step 2.
Using the next-hop IP address, configure ISP with a summary static route that includes all
the subnets that are missing from the routing table. Record the command that you used.
ISP(config)#
ip route 192.168.2.0 255.255.255.0 209.165.201.2
View the routing table of R3 to verify the new static route entry.
Step 3.
Task 10: Verify the Configurations
Answer the following questions to verify that the network is operating as expected.
From PC2, is it possible to ping PC1?
yes
From PC2, is it possible to ping the web server?
yes
From PC1, is it possible to ping the web server?
yes
The answer to these questions should be
yes
. If any of the above pings failed, check your physical
connections and configurations. For a review of basic troubleshooting techniques, see “Lab 1-1:
Cabling a Network and Basic Router Configuration (1.5.1).”
What routes are present in the routing table of BRANCH?
192.168.2.128/26
192.168.2.192/26
0.0.0.0/0
What routes are present in the routing table of HQ?
192.168.2.64/26
192.168.2.128/26
192.168.2.192/26
