[c-nsp] EIGRP reality check

Adam Vitkovsky adam.vitkovsky at swan.sk
Wed Nov 27 07:52:40 EST 2013


Eigrp default metric = 256*(10000000/path-minBW + sum(delays/10))

BW is in Kbps
-so the formula does work for up to 10G links

However when comparing 10G an 1G int on me3600 I see following delay
sh int g0/2
.. DLY 10 usec,
sh int te0/1
.. DLY 1000 usec

Say what? Hahaha :)

Do your interfaces have similar delay discrepancies please :) ?

So in my case it would be:
1G:
256*(10000000/1000000 + sum(delays/10)) = 256*(10+1) -best path

10G:
256*(10000000/10000000+ sum(delays/10))= 256*(1+100)


adam




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