Objectives of this chapter: Describe the background and history of Enhanced Interior Gateway Routing Protocol (EIGRP). Examine the basic EIGRP configuration commands and identify their purposes. Calculate the composite metric used by EIGRP. Describe the concepts and operation of DUAL. | Chapter 09 EIGRP: of Enhanced Interior Gateway Routing Protocol MẠNG MÁY TÍNH NÂNG CAO Objectives Describe the background and history of Enhanced Interior Gateway Routing Protocol (EIGRP). Examine the basic EIGRP configuration commands and identify their purposes. Calculate the composite metric used by EIGRP. Describe the concepts and operation of DUAL. Describe the uses of additional configuration commands in EIGRP. Introduction Introduction EIGRP Message Format The data portion of an EIGRP message is encapsulated in a packet. This data field is called Type/Length/Value or TLV Data link frame header - contains source and destination MAC address IP packet header - contains source & destination IP address EIGRP packet header - contains AS number Type/Length/Field - data portion of EIGRP message EIGRP Message Format EIGRP Message Format Protocol Dependent Modules (PDM) EIGRP uses PDM to route several different protocols . IP, IPX & AppleTalk PDMs are responsible for the specific . | Chapter 09 EIGRP: of Enhanced Interior Gateway Routing Protocol MẠNG MÁY TÍNH NÂNG CAO Objectives Describe the background and history of Enhanced Interior Gateway Routing Protocol (EIGRP). Examine the basic EIGRP configuration commands and identify their purposes. Calculate the composite metric used by EIGRP. Describe the concepts and operation of DUAL. Describe the uses of additional configuration commands in EIGRP. Introduction Introduction EIGRP Message Format The data portion of an EIGRP message is encapsulated in a packet. This data field is called Type/Length/Value or TLV Data link frame header - contains source and destination MAC address IP packet header - contains source & destination IP address EIGRP packet header - contains AS number Type/Length/Field - data portion of EIGRP message EIGRP Message Format EIGRP Message Format Protocol Dependent Modules (PDM) EIGRP uses PDM to route several different protocols . IP, IPX & AppleTalk PDMs are responsible for the specific routing task for each network layer protocol Reliable Transport Protocol (RTP) Reliable Transport Protocol (RTP) is the protocol used by EIGRP for the delivery and reception of EIGRP packets. EIGRP was designed as a Network layer independent routing protocol; therefore, it cannot use the services of UDP or TCP because IPX and Appletalk do not use protocols from the TCP/IP protocol suite. The figure shows conceptually how RTP operates. Reliable Transport Protocol (RTP) Characteristics of RTP Involves both reliable and unreliable delivery of EIGRP packet Reliable delivery requires acknowledgment from destination Unreliable delivery does not require an acknowledgement from destination Packets can be sent Unicast Multicast: Using address EIGRP Packet Types EIGRP’s 5 Packet Types Hello packets Used to discover & form adjacencies with neighbors EIGRP Packet Types Update packets Used to propagate routing information EIGRP Packet Types Query packets Used by DUAL for searching for .
