Please help me...Calculating metrics for FD across default Serial interfaces

Default values are in effect:
Bandwidth is 1544 between the two ends
Delay is default at 20000
no other metrics are in effect:

Show ip eigrp topo from router 1:

P 192.168.2.32/28, 1 successors, FD is 2169856
via connected, Serial0/0
What I don't understand is how they get that FD metric over a default serial link.
Here are my calculations and Metric which is much larger...what am I doing wrong here

:

Metic = 256(10000000/1544) + 256(20000)
256*6476.68 +5120000
1658030+5120000
6778030 total Metic

The 1544 is the least-bandwidth between both interfaces. I thought I understood metrics until I came across this example in the book.

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Comments

Zartanasaurus

You're calculating wrong. Divide the interface reported delay by 10. It's delay in tens of microseconds.

Tumada

Thanks for pointing that out.

Metic = 256(10000000/1544) + 256(2000)
256*6476 +5120000
1657856+512000
2169856 total Metic

two things I was doing wrong. First i foregot to divide the delay by 10 (big difference) Second, I used a calculator to multiply the BW and included the nubers after the decimal. Once I adjusted the delay and used whole numbers on the BW calculation the metic fell into place.

thanks

hbk

Yep, remember that the delay is already in multiple of 10.