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EIGRP Metric Calculation – Exercise 1

April 26, 2013

Calculate the metric from R1’s Fa0/0 to R2’s Fa0/0. Assume K-values are default.

ScreenCapture at Fri Apr 26 18:26:58 CDT 2013

R1#sh int f0/0
FastEthernet0/0 is up, line protocol is up 
 Hardware is Gt96k FE, address is c400.6413.0000 (bia c400.6413.0000)
 Internet address is 10.1.1.1/24
 MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec, 
 reliability 255/255, txload 1/255, rxload 1/255
 Encapsulation ARPA, loopback not set
 Keepalive set (10 sec)
 Half-duplex, 10Mb/s, 100BaseTX/FX

R2#sh int f0/0
FastEthernet0/0 is up, line protocol is up 
 Hardware is Gt96k FE, address is c401.6413.0000 (bia c401.6413.0000)
 Internet address is 10.1.1.2/24
 MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec, 
 reliability 255/255, txload 1/255, rxload 1/255
 Encapsulation ARPA, loopback not set
 Keepalive set (10 sec) Half-duplex, 10Mb/s, 100BaseTX/FX

Answer

Bandwidth setting on R1: 10000

Delay setting on R1: 1000

((10,000,000 / 10,000) + 100) * 256
(1,000 + 100) * 256
1,100 * 256 = 281,600

R1#sh ip eigrp topology 10.1.1.0 255.255.255.0 
IP-EIGRP (AS 1): Topology entry for 10.1.1.0/24
 State is Passive, Query origin flag is 1, 1 Successor(s), FD is 281600
 Routing Descriptor Blocks:
 0.0.0.0 (FastEthernet0/0), from Connected, Send flag is 0x0
 Composite metric is (281600/0), Route is Internal
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