Very large metric on EIGRP named mode

■Task

Get the same output with below.
Don’t change configuration of RT2.

■Topology

■Pre-Config

RT1

RT2

■Answer

RT1:
conf t
!
router eigrp CCIE
address-family ipv4 unicast autonomous-system 100
metric rib-scale 200
!
end

■Verify

■Note

If you change rib-scale of RT1, you can get the requested output.
you can calculate metric of EIGRP named mode if you use formula with below.

[(K1 * Minimum Throughput + {K2 * Minimum Throughput} / 256 – Load + (K3 * Total Latency) + (K6*Extended Attributes)] * [K5 / (K4 + Reliability)]

K1=1,K2=0,K3=1,K4=0,K5=0,K6=0


(K1 * Minimum Throughput) + (K3 * Total Latency)
Minimum Throughput = (10^7 * 65536 / Bw)

Total Latency
– Below 1 giga : (Delay * 65536) / 10^6
– Above 1 giga = (10^7 * 65536 / 10^6 ) / Bw

Then, It is registered as metric in the RIB that calculated FD(metric) divided by rib-scale.
default value of rib-scale is 128.

However, bandwidth of RT2’s loopback 0 is configured 1k.
This value is very low, so don’t register it in RIB.

You have to calculate rib-scale from output for registering route in RIB.

655753216000 / x = 3278766080

x = 655753216000 / 3278766080

x = 200

■Reference

Command Reference : metric rib-scale

Configuration Guide : Wide Metric

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