2. IP Routing
• Routing is the process of moving IP packets from one network to
another network.
• Routing involves two basic activities:
– Determining best paths.
– Forwarding Packets through these paths.
CCIE
CCNP
CCNA
3. IP Routing
S0
C
S2
S0
S1
D
Source IP & Port
DATA
191.0.0.10 - 80
http
Destination IP & Port
request
61.0.0.10 - 3000
E0
191.0.0.10
S1
S1
DATA
DATA
A
S0
E0
Source IP & Port
DATA
61.0.0.10 - 3000
DATA
http
Destination IP & Port
request
191.0.0.10 - 80
CCIE
61.0.0.10
CCNP
CCNA
S0
B
4. Routing Network Diagram
Branch Office
Head Office
S0
CHE 172.16.0.1/16
E0
192.168.1.1/24
CCIE
LAN – 192.168.1.0/24
CCNP
CCNA
S1
172.16.0.2/16
HYD
E0
10.0.0.1/8
LAN – 10.0.0.0/8
5. Conditions for Routing
• Head office Ethernet interface should be in the same network as
your Head office LAN and similarly on Branch office side.
Show
diagram
• Head office and Branch office connected Serial interface should be
in same network.
Show
diagram
• Head office LAN and Branch office LAN should be in different
networks.
Show
diagram
• All interfaces of a Router should be in different networks.
CCIE
CCNP
CCNA
Show
diagram
8. Static Routing
• Static routes are configured, maintained and updated by network
administrator manually.
• Administrator should know the destination IP network for
configuration.
• Administrative distance for Static Route is 1.
Administrative Distance (AD) is the
“reliability” of the routing protocol. AD
range is 0-255, lesser the administrative
distance, higher the priority
CCIE
CCNP
CCNA
9. Static Routing Configuration
Branch Office
S0
CHE 172.16.0.1/16
E0
192.168.1.1/24
CCIE
LAN – 192.168.1.0/24
CCNP
CCNA
Head Office
S1
172.16.0.2/16
HYD
E0
10.0.0.1/8
LAN – 10.0.0.0/8
Example 1
Example 2
