NET323 D: NETWORKS PROTOCOLS

Transcription

1 1 NET323 D: NETWORKS PROTOCOLS Networks and Communication Systems Department TA. Anfal AlHazzaa Lab # 6 (part 2) : Dynamic Route (OSPF - Multiarea)

2 Lab Objectives 2 To configure dynamic route on the routers using OSPF (Open Shortest Path First) multi-area To send ICMP message between devices in different networks.

3 Lab Content 3 Introduction to OSPF multi-area OSPF multi-area routers types How to configure OSPF multi-area on the router Example Showing Routing table

4 Introduction to OSPF multi-area 4 To handle routing efficiently and in a timely manner, OSPF divides an autonomous system into areas. An area is a collection of networks, hosts, and routers all contained within an autonomous system (all networks inside an area must be connected) Among the areas inside an autonomous system is a special area called the backbone; all the areas inside an autonomous system must be connected to the backbone.

5 Introduction to OSPF multi-area cont. 5 The routers inside the backbone are called the backbone routers. At the border of an area, special routers called area border routers (ABR) summarize the information about the area and send it to other areas. Each area has an area identification. The area identification of the backbone is zero

6 OSPF multi-area routers types 6 Router Type Internal Router Area border router (ABR) Description This router is within a specific area only. All interfaces on internal routers are in the same area. ABRs are responsible for connecting two or more areas. ABRs contain the full topological database of each area they are connected to and send this information to other areas. Backbone router Backbone routers are connected to area 0.

7 OSPF multi-area routers types cont. 7 Backbone router Backbone router ABR ABR ABR ABR Backbone router Backbone router Internal Router

8 How to configure OSPF (multi-area) on the router? 8 OSPF configuration For each router, you have to configure only its directly connected networks by using the following command ( in the global configuration mode): router ospf 1 network [network address] [Wildcard mask] area [id].. exit

9 9 How to configure OSPF (multi-area)on the router? Cont. Command Router ospf 1 Network [network address] Wildcard mask Area id Exit description Puts you in router OSPF configuration mode 1 is process id and can be any number Tell the routing protocol what network to advertise (followed by the network address) in dotted-decimal notation Inverted of subnet mask (in dotted-decimal notation) Determine which OSPF area the network belong to (id must be number) To exit from the router OSPF configuration mode.

10 Note 10 For Internal Router all networks will have same area id For ABR (Area Border Router) each network will have area id based on the area that belong to.

11 11 [Example] Configuring OSPF (multiarea) on a router (Router 0) area 1 Router 0: router ospf 1 network area 1 network area 1 exit

12 12 [Example] Configuring OSPF (multiarea) on a router (Router 1) area 1 Router 1: router ospf 1 network area 1 network area 1 exit

13 13 [Example] Configuring OSPF (multiarea) on a router (Router 2) - ABR Router 2 (ABR): router ospf 1 network area 1 network area 0 exit

14 14 [Example] Configuring OSPF (multiarea) on a router (Router 3) area 0 Router 3: router ospf 1 network area 0 network area 0 exit

15 15 [Example] Configuring OSPF (multiarea) on a router (Router 4) area 0 Router 4: router ospf 1 network area 0 network area 0 exit

16 16 [Example] Configuring OSPF (multiarea) on a router (Router 5) ABR Router 5 (ABR): router ospf 1 network area 0 network area 2 exit

17 17 [Example] Configuring OSPF (multiarea) on a router (Router 6) area 2 Router 6: router ospf 1 network area 2 network area 2 exit

18 18 [Example] Configuring OSPF (multiarea) on a router (Router 7) area 2 Router 7: router ospf 1 network area 2 network area 2 exit

19 Showing Routing table 19 Example : Routing table of Router 3 Use the following command to show the routing table at privilege mode Show ip route

20 Note 20 IA : abbreviated to Inter-area and it means that the network is belong to area not directly connected to the router

21 References 21 Cisco Packet Tracer Help Data Communication and Networking, by Behrouz A Forouzan, McGraw Hill, CCNP Practical Studies: Routing Copyright InformIT. (n.d.). Retrieved 2015, from H3C S3600 Series Ethernet Switches Operation Manual-Release 1702(V1.01). (n.d.). Retrieved 2015, from