E /24 LAN /24LAN – / /8 S0 S /8 Head Office Branch Office E /16

Routing Routing is the process of moving packets from one network to another network. Routing involves two basic activities: –Determining best paths. –Forwarding Packets through these paths.

Rules of 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 S0 and Branch Office S1 should be in same network. Show Diagram Head Office LAN and Branch Office LAN should be in different Network. Show Diagram All interfaces of Router should be in different network. Show Diagram

Types of Routing Static Routing Default Routing Dynamic Routing

Static Routing It is configured manually by Administrator. It is Secure & fast. Require Destination Network ID for configuration Used in Small Networks Administrative distance for Static Route is 0 and 1. {Administrative Distance (AD) is the “trustworthiness” of the routing information. AD range is 0-255, lesser the Administrative distance, higher the priority}

Static Routing Network Diagram E /24 LAN /24LAN – / /8 S0 S /8 E /16 Head Office Branch Office

Routing Network Diagram E /24 LAN / /8 S0 S /8 Head Office Branch Office LAN – /16 E /16

Routing Network Diagram E /24 LAN / /8 S0 S /8 Head Office Branch Office LAN – /16 E /16

Routing Network Diagram E /24 LAN / /8 S0 S /8 Head Office Branch Office LAN – /16 E /16

Routing Network Diagram E /24 LAN / /8 S0 S / /8 S0 Head Office Branch Office LAN – /16 E /16

Routing Network Diagram E /24 LAN / /8 S0 S /8 Head Office Branch Office LAN – /16 E /16

exit Chennai(config-if)# Chennai(config)# telnet ================================ Welcome to Chennai Router ================================ User Access Verification password : **** enable configure terminal interface serial 0 ip address no shut clockrate encapsulation hdlc Chennai> password : Chennai# Enter configuration commands, one per line. End with CNTL/Z. Chennai(config)# Chennai(config-if)# Microsoft Windows 2000 [Version ] (C) Copyright Microsoft Corp. C:\> Connecting..... Chennai# Diagram

show ip route Chennai# Default gateway is not set Host Gateway Last Use Total Uses Interface ICMP redirect cache is empty Chennai# show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i- IS-IS, L1-IS-IS level-1, L2-IS-IS level-2,*- candidate default U - per-user static route, o - ODR Gateway of last resort is not set C /24 is directly connected, Ethernet0 C /8 is directly connected, Serial0 Chennai# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Chennai(config)# ip routing ^ Z Enabling Routing Router(config)#ip routing Enabling Routing Router(config)#ip routing Diagram

Chennai# show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i- IS-IS, L1-IS-IS level-1, L2-IS-IS level-2,*- candidate default U - per-user static route, o - ODR Gateway of last resort is not set C /24 is directly connected, Ethernet0 S /16 [1/0] via C /8 is directly connected, Serial0 Chennai# Enter configuration commands, one per line. End with CNTL/Z. Chennai(config)# ip route ^ Z configure terminal S – for Static Routing 1 is nothing but Administrative Distance Configuring Static Route Router(config)# ip route Or Router(config)# ip route Configuring Static Route Router(config)# ip route Or Router(config)# ip route Diagram

exit Hyderabad1(config)# Hyderabad1# ================================ Welcome to Hyderabad1 Router ================================ User Access Verification password : **** **** enable configure terminal ip address no shut encapsulation hdlc exit Hyderabad1> password : Hyderabad1# Enter configuration commands, one per line. End with CNTL/Z. Hyderabad1(config)# Hyderabad1(config-if)# Microsoft Windows 2000 [Version ] (C) Copyright Microsoft Corp. C:\> Connecting..... Hyderabad1# telnet interface serial 1 Diagram

Chennai# show ip routeChennai# Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i- IS-IS, L1-IS-IS level-1, L2-IS-IS level-2,*- candidate default U - per-user static route, o - ODR Gateway of last resort is not set C /24 is directly connected, Ethernet0 S /16 [1/0] via C /8 is directly connected, Serial0 Chennai# Enter configuration commands, one per line. End with CNTL/Z. Chennai(config)# ip route Chennai(config)# ^Z^Z configure terminal ping Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to , timeout is 2 seconds: Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms Chennai# !!!!! Diagram

Hyderabad1# show ip routeHyderabad1# Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i- IS-IS, L1-IS-IS level-1, L2-IS-IS level-2,*- candidate default U - per-user static route, o - ODR Gateway of last resort is not set C /16 is directly connected, Ethernet0 S is directly connected, Serial1 C /8 is directly connected, Serial1 Hyderabad1# Enter configuration commands, one per line. End with CNTL/Z. Hyderabad1(config)# ip route S1 Hyderabad1(config)# ^Z^Z configure terminal ping Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to , timeout is 2 seconds: Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms Hyderabad1# !!!!! Diagram