I'm little confused on 3.8 :
Modify the R1’s policy routing so that if R1 loses R5 as a CDP neighbor
traffic from R3 to R4’s Loopback0 network is rerouted directly to R4.
Okay traffic direction could be manipulated with PBR/route-map/access-list... now Can some1 care to explain this game of words on CDP and how to use EOT tracking on that ?
P.S Just read this in soultion guide, thanks INE - I've read 3 books+DOCCD and could not find CDP correlation when it comes to PBR.
With CDP tracking for policy routing R1 looks into the CDP table to see if there is a neighbor installed with IP address that matches the next-hop value being set in the route-map. In this case the syntax
set ip next-hop 18.104.22.168
set ip next hop verify-availability
set ip default next-hop 22.214.171.124
means if there is no CDP neighbor with IP address 126.96.36.199 traffic that matches this sequence will be routed to 188.8.131.52