Routing
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Transcript of Routing
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• Routing– Forwarding of packets from one network to
another network choosing the best path from the routing table.
– Routing table consist of only the best routes for every destinations.
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Routing Network Diagram
E0 10.1.1.1/8
HYD
LAN – 10.0.0.0/24
E0 20.1.1.1/24
KSA
LAN – 20.0.0.0/24
1.1.1.1/8S0
S11.1.1.2/8
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• Head Office Ethernet interface should be in the same network as your Head office LAN and similarly on Branch Office side.
• Head Office S0 and Branch Office S1 should be in same network.
• Head Office LAN and Branch Office LAN should be in different Network.
• All interfaces of Router should be in different network.
Rules of Routing
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• Static Routing
• Default Routing
• Dynamic Routing
Types of Routing
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• It is configured by Administrator manually.
• Mandatory need of Destination Network ID
• It is Secure & fast
• Used for Small organizations with a network of 10-15 Routers.
• Administrative distance for Static Route is 0 and 1.
• It is the “trustworthiness” of the routing information. Lesser the Administrative distance, higher the preference.
Disadvantages :-• Used for small network.
• Everything to manually
• Network change effect complete n/W
Static Routing
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Configuring Static Route
Router(config)# ip route <Destination Network ID> <Destination Subnet Mask> <Next-hop IP address >
Or
Router(config)# ip route <Destination Network ID> <Destination Subnet Mask> <Exit interface type><interface
number>
Example: ip route 11.0.0.0 255.0.0.0 10.0.0.2
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Routing Network Diagram
E0 10.1.1.1/8
HYD
LAN – 10.0.0.0/24
E0 20.1.1.1/24
KSA
LAN – 20.0.0.0/24
1.1.1.1/8S0
S11.1.1.2/8
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• A Default routing protocol is configured for unknown destinations.
• Generally used in the internet where the destinations are unknown.
• Example : The address of yahoo is unknown.
• Configured at end points
• It is the last preferred routing
• Default routes help in reducing the size of your routing table.
Default Routes
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Default Routing - Real Time Example
E0 192.168.1.150/24
LAN - 192.168.1.0/24
E0 202.54.30.150/24
IP 202.54.30.1/24
HYD
INTERNET
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Configuring Default Route
Router(config)# ip route <Destination Network ID> <Destination Subnet Mask> <Next-hop IP address >
OrRouter(config)# ip route <Destination Network ID>
<Destination Subnet Mask> <Exit interface type><interface
number>
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