1. Subnetting -2

2. Can you identify?
Network address, if you are given a host address and subnet mask
How can you find it:
AND

3. Identify Network Address
Find if the two given host addresses are in the same network
AND the network address with respective subnet masks and find the network address
Yes, they are on the same network

4. Show IP route - identify different entries
C /24 is directly connected, Ethernet /24 is subnetted, 1 subnets C is directly connected, Loopback1 C is directly connected, Serial0 C is directly connected, Serial1 R [120/1] via , 00:00:00, Serial0 [120/1] via , 00:00:00, Serial1 S* /0 [1/0] via
C – Directly connected
S – Static
S* - Default route
R – RIP route
[120/1]. This indicates both the administrative distance and the metric (the 120 is the AD, and the 1 is the hop-count metric

5. Find Preferred Route S 192.168.0.0/16 [1 / 0] via 10.1.1.1AD
Metric
AD: Administrative Distance : Smaller the better
Metric : Smaller the better
R /24 [120/1] via , 00:00:00, Serial0
R /24 [120/5] via , :00:00, Serial1

6. Two redundant paths
Serial 0
/24
1.5Mbps
Serial 1
R /24 [120/1] via , 00:00:00, Serial0
R /24 [120/5] via , :00:00, Serial1

7. Find Preferred Route
O /24 [110/58] via , 00:00:00, Serial3
R /24 [120/1] via , 00:00:00, Serial0
administrative distance chooses the route it “trusts” the most.
route with the lowest administrative distance is always preferred, regardless of metric

8. Find Preferred Route
R /24 [120/1] via , 00:00:00, Serial0
S /16 [1/0] via
Route with longest prefix is preferred, i.e., with more bits in the subnet mask
Route with longest prefix is more definitive

9. Which route will be selected to 192.168 network?
O /24 [110/58] via , 00:00:00, Serial3 R /24 [120/1] via , 00:00:00, Serial0 R /24 [120/5] via , 00:00:00, Serial1 S /16 [1/0] via
Prefix-Length: prefix- length is always
considered first
Metric
Administrative Distance - lowest administrative distance – 120/110/1
route with the lowest administrative distance is always
preferred, regardless of metric (assuming the prefix-length is equal). Thus,
the metric is calculated first, but not preferred first over AD.

10. What are the following modes used for
R1 > user exec mode..
Example...
R1 (config) # configuration mode
Example
R1# privilege mode
R1 (config –if)# interface configuration mode

11. Conditions to bring up interface
Fast Ethernet
IP Address
subnet mask
no shutdown
Serial Interface
Clock rate