Sunday, August 26, 2012

EIGRP Matrix Calculation(Part-2)



In Above Topology,
Outgoing interfaces for remote networks 172.16.0.0/23,172.16.2.0/23,172.16.4.0/23 from Snoe Router is Snoe's f0/0 and Sophia's Lo0,Lo1,Lo2.
Outgoing interfaces for remote networks 200.0.0.8/29 from Snoe Router is Snoe's f0/0 and Sophia's f0/1.
Outgoing interfaces for remote networks 200.0.0.16/30,200.0.0.20/30 from Snoe Router is Snoe's f0/0,Sophia's f0/1 and Kasi's Lo0,Lo1.


Router        Outgoing Interface         Bandwidth                   Delay    
Snoe                  f0/0                        100000 Kbits         100 microsecond
Sophia               f0/1                        10000 Kbits           1000 microsecond
Sophia               Lo0                        8000000 Kbits       5000 microsecnond
Kasi                   Lo0                        8000000 Kbits       5000 microsecnond


Snoe>enable
Snoe#show ip route eigrp
  200.0.0.0/24 is variably subnetted,4 subnets,2 masks
D   200.0.0.8/29 [90/284160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   200.0.0.16/30 [90/412160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   200.0.0.20/30 [90/412160] via 200.0.0.3, 1:44:39, FastEthernet0/0
  172.16.0.0/23 is subnetted,3 subnets
D   172.16.4.0 [90/156160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   172.16.0.0 [90/156160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   172.16.2.0 [90/156160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   192.168.4.0/23 [90/156160] via 200.0.0.2, 1:44:39, FastEthernet0/0
D   192.168.6.0/23 [90/156160] via 200.0.0.2, 1:44:39, FastEthernet0/0
D   192.168.0.0/22 [90/156160] via 200.0.0.2, 1:44:39, FastEthernet0/0

EIGRP Matrix Formula

metric = [K1 * bandwidth+(K2 * bandwidth)/(256 - load)+K3 * delay] * [K5/(reliability + K4)]



Eigrp matrix weight K1=1,K2=0,K3=1,K4=0,K5=0.
Metric = bandwidth + delay 

The lest Metric Formula for Cisco's Router,
Metric={(10,000,000/slowest bandwidth in kbps)+(total delay in microsecond /10)}*256
Slowest bandwidth in kbps=Only one interface's bandwidth that have lowest bandwidth among all                      outgoing interfaces to desire remote
Total delay in microsecond=The sum of the all outgoing interface's delay.

D   200.0.0.8/29 [90/284160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   200.0.0.8/29 [90/412160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   200.0.0.8/29 [90/412160] via 200.0.0.3, 1:44:39, FastEthernet0/0

Sophia's f0/0 has lowest bandwidth,
Metric={(10,000,000/slowest bandwidth in kbps)+(total delay in microsecond /10)}*256
Metric={(10,000,000/10000)+(1100 /10)}*256
Metric={1000+110}*256
Metric={1110}*256 = 284160

Metric={(10,000,000/slowest bandwidth in kbps)+(total delay in microsecond /10)}*256
Metric={(10,000,000/10000)+(6100 /10)}*256
Metric={(1000)+(610)}*256 
Metric=(1610)*256  =412160

D   172.16.4.0 [90/156160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   172.16.0.0 [90/156160] via 200.0.0.3, 1:44:39, FastEthernet0/0
D   172.16.2.0 [90/156160] via 200.0.0.3, 1:44:39, FastEthernet0/0

Total delay=Snow's f0/0+Sophia's Lo0 = 100 +5000=5100 microsecond
Lowest Bandwidth Interface=Snow's Interface =100000 Kbits
Metric={(10,000,000/slowest bandwidth in kbps)+(total delay in microsecond /10)}*256
Metric={(10,000,000/100000)+(5100/10)}*256
Metric={(100)+(510)}*256
Metric={610}*256 = 156160


 ေလးစားစြာျဖင့္
WinTunHlaing


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