Lecture CCNA Exploration 4.0 (Kỳ 2) - Chapter 7: RIPv2

In this chapter, you will learn to: Encounter and describe the limitations of RIPv1’s limitations, apply the basic Routing Information Protocol Version 2 (RIPv2) configuration commands and evaluate RIPv2 classless routing updates, analyze router output to see RIPv2 support for VLSM and CIDR.
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Lecture CCNA Exploration 4.0 (Kỳ 2) - Chapter 7: RIPv2 Chapter 7: RIPv2 CCNA Exploration version 4.0 1 Overview Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 2 RIPv1 Limitations Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 3 Lab Topology Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 4 VLSM Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 5 Lab Topology: Private Address Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 6 Lab Topology: Loopback interface Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 7 RIPv1 Topology Limitations • Static Routes and Null Interfaces Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 8 Null interface • The address space represented by the static summary route 192.168.0.0/16 does not actually exist. • In order to simulate this static route, we use a null interface as the exit interface. • You do not need to enter any commands to create or configure the null interface. It is always up but does not forward or receive traffic. Traffic sent to the null interface is discarded. • For our purposes, the null interface will serve as the exit interface for our static route. Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 9 Extra : Null interface • The Cisco IOS software supports a null interface. This pseudo-interface functions similarly to the null devices available on most operating systems. • This interface is always up and can never forward or receive traffic; encapsulation always fails. The only interface configuration command that you can specify for the null interface is no ip unreachables. • The null interface provides an alternative method of filtering traffic. You can avoid the overhead involved with using access lists by directing undesired network traffic to the null interface. Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 10 Extra: Using discard routes Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 11 RIPv1 Topology Limitations • Verifying and Testing Connectivity Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 12 RIPv1 Topology Limitations • Verifying and Testing Connectivity Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 13 Lab 7.1.2.3: RIPv1 Topology Limitations • Use the Packet Tracer Activity to practice your router configuration skills, including RIPv1 configurations. Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 14 RIPv1: Discontiguous Networks • RIPv1 is a classful routing protocol. – It does not include the subnet masks in its routing updates. – Therefore, RIPv1 cannot support discontiguous networks, VLSM, or Classless Inter-Domain Routing (CIDR) supernets. Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 15 RIPv1: Discontiguous Networks • Because the subnet mask is not included in the update, RIPv1 and other classful routing protocols must summarize networks at major network boundaries. Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 16 RIPv1: Discontiguous Networks Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 17 RIPv1: Discontiguous Networks Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 18 RIPv1: Discontiguous Networks Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 19 RIPv1: No VLSM Support Học viện mạng Cisco Bách Khoa - Website: www.ciscobachkhoa.com 20