Addressing Table

Objectives

Part 1: Modify OSPF Default Settings
Part 2: Verify Connectivity

Scenario
In this activity, OSPF is already configured and all end devices currently have full connectivity. You will modify the default OSPF routing configurations by changing the hello and dead timers and adjusting the bandwidth of a link.

Part 1: Modify OSPF Default Settings
Step 1: Test connectivity between all end devices.
Before modifying the OSPF settings, verify that all PCs can ping the webserver
and each other.

Ping from PC2 to Webserver 64.100.1.2

Packet Tracer PC Command Line 1.0
C:>ping 64.100.1.2

Pinging 64.100.1.2 with 32 bytes of data:

Request timed out.
Reply from 64.100.1.2: bytes=32 time=2ms TTL=126
Reply from 64.100.1.2: bytes=32 time=23ms TTL=126
Reply from 64.100.1.2: bytes=32 time=10ms TTL=126

Ping statistics for 64.100.1.2:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 23ms, Average = 11ms

C:>

Step 2: Adjust the hello and dead timers between R1 and R2.

a. Enter the following commands on R1.

R1(config)# interface s0/0/0
R1(config-if)# ip ospf hello-interval 15
R1(config-if)# ip ospf dead-interval 60

b. After a short period of time, the OSPF connection with R2 will fail. Both sides of the connection need to have the same timers in order for the adjacency to be maintained. Adjust the timers on R2.

Step 3: Adjust the bandwidth setting on R1.

a. Trace the path between PC1 and the webserver located at 64.100.1.2. Notice that the path from PC1 to 64.100.1.2 is routed through R2. OSPF prefers the lower-cost path.
b. On the R1 Serial 0/0/0 interface set the bandwidth to 64 Kb/s. This does not change the actual port speed, only the metric that the OSPF process on R1 will use to calculate the best routes.

R1(config-if)# bandwidth 64

c. Trace the path between PC1 and the web server located at 64.100.1.2. Notice that the path from PC1 to 64.100.1.2 is redirected through R3. OSPF prefers the lower cost path.

Part 2: Verify Connectivity
Verify all PCs can ping the web server and each other.

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By Admin