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Transcript
1 Dynamic Routing Advantages of Dynamic over static : • There is no need to know the destination networks. • Need to advertise the directly connected networks. • Updates the topology changes dynamically. • Administrative work is reduced • Used for large organizations. 2 Types of Dynamic Routing Protocols • Distance Vector Protocol • Link State Protocol • Hybrid Protocol 3 Distance Vector Protocol • Works with Bellman Ford algorithm • Periodic updates • Classful routing protocol • Full Routing tables are exchanged • Updates are through broadcast • Also known as “Routing By Rumor” • Example: RIP, IGRP 4 Link State Protocol • Works with Dijkstra algorithm • Link state updates • Classless routing protocol • Missing routes are exchanged • Updates are through multicast • Also known as “ Routing by Intelligence” • Example : OSPF, IS-IS 5 Hybrid Protocol • Works with DUAL algorithm • Link state updates • Classless routing protocol • Missing routes are exchanged • Updates are through multicast • Also known as “ Routing by Intelligence” • Example : EIGRP 6 Routing Information Protocol • Open Standard Protocol • Classful routing protocol • Updates are broadcasted via 255.255.255.255 • Administrative distance is 120 • Metric : Hop count Max Hop counts : 15 Max routers : 16 • Load Balancing of 4 equal paths • Used for small organizations 7 Rip Timers • Update timer : 30 sec – Time between consecutive updates • Invalid timer : 180 sec – Time a router waits to hear updates – The route is marked unreachable if there is no update during this interval. • Flush timer : 240 sec – Time before the invalid route is purged from the routing table • Holddown timer : 180sec – Specifies the amount of time for which the information about poorer routes are ignored. 8 RIP - Network Diagram 10.0.0.1/8 S0 HYD 11.0.0.1/8 S0 S1 10.0.0.2/8 E0 192.168.1.150/24 LAN - 192.168.1.0/24 CHE S1 11.0.0.2/8 E0 192.168.2.150/24 LAN - 192.168.2.0/24 BAN E0 192.168.3.150/2 LAN - 192.168.3.0/24 9 Disadvantages of RIP • More Bandwidth utilization • Doesn’t consider the bandwidth, works only with hop counts • Slow convergence • Formation of Routing loops 10 11 Microsoft Windows 2000 [Version 5.00.2195] (C) Copyright 1985-2000 Microsoft Corp. C:\> telnet 192.168.1.150 Connecting ..... ================================ Welcome to Hyderabad Router ================================ User Access Verification password : **** Directly Connected Networks on Hyderabad> enable HYDERABAD Router password : **** Hyderabad# configure terminal 192.168.1.0 Enter configuration commands, one per line. End with CNTL/Z. 10.0.0.0 Hyderabad(config)# interface serial 0 Hyderabad(config-if)# ip address 10.0.0.1 255.0.0.0 Hyderabad(config-if)# no shut Hyderabad(config-if)# clockrate 64000 Hyderabad(config-if)# encapsulation hdlc Hyderabad(config-if)# exit Hyderabad(config)# Diagram 12 Hyderabad(config)# no ip routing Hyderabad(config)# ip routing Hyderabad(config)# router rip Hyderabad(config-router)# network 192.168.1.0 Hyderabad(config-router)# network 10.0.0.0 Hyderabad(config-router)# Configuring RIP Router(config)# router rip Router(config-router)# network <Network ID> Diagram 13 Hyderabad(config)# no ip routing Hyderabad(config)# ip routing Hyderabad(config)# router rip Hyderabad(config-router)# network 192.168.1.0 Hyderabad(config-router)# network 10.0.0.0 Hyderabad(config-router)# ^Z Hyderabad# 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 10.0.0.0/8 is directly connected, Serial0 R 11.0.0.0/8 [120/1] via 10.0.0.2, 00:00:25, Serial0 C 192.168.1.0/24 is directly connected, Ethernet0 R 192.168.2.0/24 [120/1] via 10.0.0.2, 00:00:25, Serial0 ofbut Rip 120 is Metric nothing R – for RIP routes Administrative Distance R 192.168.3.0/24 [120/2] Hop via Count 10.0.0.2, 00:00:25, Serial0 Hyderabad# Diagram 14 Hyderabad# show ip protocols Routing Protocol is "rip" Sending updates every 30 seconds, next due in 13 seconds Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Redistributing: rip Default version control: send version 1, receive any version Interface Send Recv Key-chain Ethernet0 1 1 2 Serial0 1 1 2 Routing for Networks: 192.168.1.0 10.0.0.0 Routing Information Sources: Gateway Distance Last Update 10.0.0.2 120 00:00:00 Distance: (default is 120) Hyderabad# Diagram 15 Microsoft Windows 2000 [Version 5.00.2195] (C) Copyright 1985-2000 Microsoft Corp. C:\> telnet 192.168.2.150 Connecting ..... ================================ Welcome to Chennai Router ================================ User Access Verification password : **** Chennai> enable Directly Connected Networks on CHENNAI Router password : **** Chennai# configure terminal192.168.2.0 Enter configuration commands, one per line. End with CNTL/Z. 10.0.0.0 Chennai(config)# interface serial 1 11.0.0.0 Chennai(config-if)# ip address 10.0.0.2 255.0.0.0 Chennai(config-if)# no shut Chennai(config-if)# encapsulation hdlc Chennai(config-if)# interface serial 0 Chennai(config-if)# ip address 11.0.0.1 255.0.0.0 Chennai(config-if)# no shut Chennai(config-if)# encapsulation hdlc Diagram 16 Chennai(config)# no ip routing Chennai(config)# ip routing Chennai(config)# router rip Chennai(config-router)# network 192.168.2.0 Chennai(config-router)# network 10.0.0.0 Chennai(config-router)# network 11.0.0.0 Configuring RIP Chennai(config-router)# Router(config)# router rip Router(config-router)# network <Network ID> Diagram 17 Chennai(config)# no ip routing Chennai(config)# ip routing Chennai(config)# router rip Chennai(config-router)# network 192.168.2.0 Chennai(config-router)# network 10.0.0.0 Chennai(config-router)# network 11.0.0.0 ^ Chennai(config-router)# Z 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 10.0.0.0/8 is directly connected, Serial1 C 11.0.0.0/8 is directly connected, Serial0 R 192.168.1.0/24 [120/1] via 10.0.0.1, 00:00:01, Serial1 C 192.168.2.0/24 is directly connected, Ethernet0 R 192.168.3.0/24 [120/1] 11.0.0.2, ofbut Rip00:00:12, Serial0 120 via is Metric nothing R – for RIP routes Diagram 18 Chennai# Administrative Distance Hop Count Chennai# show ip protocols Routing Protocol is "rip" Sending updates every 30 seconds, next due in 5 seconds Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Redistributing: rip Default version control: send version 1, receive any version Interface Send Recv Key-chain Ethernet0 1 1 2 Serial0 1 1 2 Serial1 1 1 2 Routing for Networks: 192.168.2.0 10.0.0.0 11.0.0.0 Routing Information Sources: Gateway Distance Last Update 11.0.0.2 120 00:00:23 10.0.0.1 120 00:00:03 Distance: (default is 120) Chennai# Diagram 19 Microsoft Windows 2000 [Version 5.00.2195] (C) Copyright 1985-2000 Microsoft Corp. C:\> telnet 192.168.3.150 Connecting ..... ================================ Welcome to Banglore Router ================================ User Access Verification password : **** Banglore> enableDirectly Connected Networks on Banglore Router password : **** Banglore# configure terminal 192.168.3.0 Enter configuration commands, one per line. End with CNTL/Z. 11.0.0.0 Banglore(config)# interface serial 1 Banglore(config-if)# ip address 11.0.0.2 255.0.0.0 Banglore(config-if)# no shut Banglore(config-if)# clockrate 64000 Banglore(config-if)# encapsulation hdlc Banglore(config-if)# exit Banglore(config)# Diagram 20 Banglore(config)# no ip routing Banglore(config)# ip routing Banglore(config)# router rip Banglore(config-router)# network 192.168.3.0 Banglore(config-router)# network 11.0.0.0 Banglore(config-router)# Configuring RIP Router(config)# router rip Router(config-router)# network <Network ID> Diagram 21 Banglore(config)# no ip routing Banglore(config)# ip routing Banglore(config)# router rip Banglore(config-router)# network 192.168.3.0 Banglore(config-router)# network 11.0.0.0 Banglore(config-router)# ^Z Banglore# 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 R 10.0.0.0/8 [120/1] via 11.0.0.1, 00:00:04, Serial1 C 11.0.0.0/8 is directly connected, Serial1 R 192.168.1.0/24 [120/2] via 11.0.0.1, 00:00:04, Serial1 ofbut Rip 120 is Metric nothing – for RIP routes [120/1] via 11.0.0.1, 00:00:04, Serial1 R R 192.168.2.0/24 Administrative Distance Hop Count C 192.168.3.0/24 is directly connected, Ethernet0 Banglore# Diagram 22 Banglore# show ip protocols Routing Protocol is "rip" Sending updates every 30 seconds, next due in 15 seconds Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Redistributing: rip Default version control: send version 1, receive any version Interface Send Recv Key-chain Ethernet0 1 1 2 Serial1 1 1 2 Routing for Networks: 192.168.3.0 11.0.0.0 12.0.0.0 Routing Information Sources: Gateway Distance Last Update 11.0.0.1 120 00:00:06 Distance: (default is 120) Banglore# Diagram 23 Hyderabad# ping 192.168.3.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.3.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms Hyderabad# ping 192.168.2.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms Hyderabad# Diagram 24 Chennai# ping 192.168.1.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms Chennai# ping 192.168.3.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.3.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms Chennai# Diagram 25 Banglore# ping 192.168.1.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms Banglore# ping 192.168.2.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms Banglore# Diagram 26
