Trips

There were quite a few hard months for me. There were many schedules:

Iran,KSA, Dubai and now Malaysia.

Now I got to give exam may be without dumps now. It getting very late and falling behind the schedule.

LSA and Types

http://packetlife.net/blog/2008/jun/24/ospf-area-types/

successor and feasible successor of EIGRP

this example will successfully explain when a feasible successor route will be introduced in
show ip route:
      |---5-----R2--10--R3--10--|
R1-                                            -switch---->R5----n/w
     |----5-----R4----10----------|

Route 1> R1-->R4--->R5-->n/w
FD=5+10+5=20
AD=10+5=15

Route 2> R1-->R2-->R3-->R5-->n/w
FD=5+10+10+5=30
AD=10+10+5=25

Cost of Route 1 < Route 2 Hence Route 1 will be successor. Now we know that to qualify a route as a Feasible successor we need to have the AD of a feasible successor should be less than FD of a successor

so we need to compare the Route 2 AD and Route 1 FD. But we found that 25 is not less than 20. Hence there will be no feasible successor.

Hope this helps