6.4.1.6 Packet Tracer – Configuring IPv4 Route Summarization – Scenario 2 Instructions Answers

Packet Tracer – Configuring IPv4 Route Summarization – Scenario 2

Addressing Table

Objectives

Part 1: Calculate Summary Routes
Part 2: Configure Summary Routes
Part 3: Verify Connectivity

Background

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In this activity, you will calculate and configure summary routes. Route summarization, also known as route aggregation is the process of advertising a contiguous set of addresses as a single address. After calculating summary routes for each LAN, you must summarize a route that includes all networks in the topology for the ISP to reach each LAN.

Part 1: Calculate Summary Routes

a. What is the summary route to reach HQ LANs? 172.22.64.0 255.255.252.0

b. What is the summary route to reach Branch1 LANs? 172.22.70.0 255.255.255.0

c. What is the summary route to reach Branch2 LANs? 172.22.68.0 255.255.254.0

d. What is the summary route from the ISP router to reach all LANs? 172.22.64.0 255.255.248.0

Part 2: Configure Summary Routes

Step 1: Configure the summary routes on the HQ router to other networks.
a. Configure a directly attached summary route on HQ to reach the Branch1 LANs.

HQ(config)#ip route 172.22.70.0 255.255.255.0 s0/0/0

b. Configure a recursive summary route on HQ to reach the Branch2 LANs.

HQ(config)#ip route 172.22.68.0 255.255.254.0 172.22.71.6

Step 2: Configure the summary routes on the Branch1 router to other networks.
a. Configure a recursive summary route on Branch1 to reach the HQ LANs.

Branch1(config)#ip route 172.22.64.0 255.255.252.0 172.22.71.1

b. Configure a recursive summary route on Branch1 to reach the Branch2 LANs.

Branch1(config)#ip route 172.22.68.0 255.255.254.0 172.22.71.1

Step 3: Configure the summary routes on the Branch2 router to other networks.
a. Configure a directly attached summary route on Branch2 to reach the Branch1 LANs.

Branch2(config)#ip route 172.22.70.0 255.255.255.0 s0/0/1

b. Configure a recursive summary route on Branch2 to reach the HQ LANs.

Branch2(config)#ip route 172.22.64.0 255.255.252.0 172.22.71.5

Step 4: Configure a summary route on ISP to reach all networks.

ISP(config)#ip route 172.22.64.0 255.255.248.0 s0/0/1

Part 3: Verify Connectivity

Verify that all switches and routers can ping other devices in the topology. If not, troubleshoot your summary routes to correct any issues.
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