EIGRP slides - EIGRP Overview Has faster convergence than...

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EIGRP Overview Has faster convergence than any other IGP Is scalable because of VLSM and route summarization Supports multiple routed protocols through protocol-dependant modules Is technically an advance distance-vector routing protocol Uses partial updates Hello packets for neighbor discovery Is relatively easy to administer However, does not have OSPF’s hierarchical design (no areas)
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EIGRP Metrics EIGRP metric = 32 bits Bandwidth and Delay are equally weighted Reliability, Load, and MTU are off by default Hop count limited to 224 To remember the metric components… Big = Bandwidth Dogs = Delay Really = Reliability Like = Load Marshmallows = MTU
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Displaying Interface Values Router> show interface s0/0 Serial0/0 is up, line protocol is up Hardware is QUICC Serial Description: Out to VERIO Internet address is 207.21.113.186/30 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 246/255 Encapsulation PPP, loopback not set Keepalive set (10 sec) <output omitted> Bandwidth Delay Reliability Load
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EIGRP Tables EIGRP maintains three unique tables to assist in routing traffic. Neighbor Table Topology Table Routing Table EIGRP maintains one table of each for each routed protocol configured on the router. For example, if a router was configured with IP, IPX and AppleTalk, EIGRP would maintain… 3 Neighbor Tables 3 Topology Tables 3 Routing Tables
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Neighbor Table Use the show ip eigrp neighbors command to view the neighbor table. Contains a list of all neighbors discovered through hellos Maintains hello and holdtime intervals on each neighbor Maintains information required by RTP (Reliable Transport Protocol) SRTT Smooth Round-trip Timer; avg. time it takes to send and then receive a reply from that neighbor RTO Retransmission Timeout; how long to wait without receiving an acknowledgement to a reliably sent packet Router#show ip eigrp neighbors IP-EIGRP neighbors for process 100 H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 0 192.168.224.2 Se0 13 00:01:28 930 5000 0 30 1 192.168.208.2 Se1 11 00:02:20 35 1140 0 21
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Topology Table Use the show ip eigrp topology [all-links] command to view the table. Contains all routes the router has learned about from its neighbors and all the information necessary to calculate a set of distances and vectors to all reachable destinations FD Feasible Distance; lowest calculated metric to reach a destination as opposed to… RD Reported Distance or Advertised Distance; distance to the destination reported by the neighbor.
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This note was uploaded on 06/13/2010 for the course CITX CITX 1150 taught by Professor P.whalen during the Fall '09 term at British Columbia Institute of Technology.

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EIGRP slides - EIGRP Overview Has faster convergence than...

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