Routing is a game
Dridi Mahmoud
Consultant en sécurité chez Secteur de la vente au détail | Conseil en sécurité, Garantie de la sécurité, Cyberdéfense
Once upon a time my boss came to me and asked me to figure out what could be wrong in such redistribution .I thought it would be an easy task just simple commands and everything would be ok .However I realised that R2 and R3 are "missing around "
Well Mr.R2 why you would take such a trip to find your way to the subnet 192.168.2.0 !!! it is just one step and you are going be there !
Let 's see the routing table
Well Administrative Distance win .Since Subnet 192.168.2.0 was connected and redistributed in EIGRP AD=170 then from EIGRP to OSPF AD=110 Mr.R2 would see from his prospective that the best path would be
should I use route-map ? access-lists ? should I be tough ?
Acually , I knew that AD is important I tried many possible ways to figure it out .Until I came up with this idea .
Who can bring AD down ? well specific path is the king and the decision maker so here is the solution
If I tell Mr.R2 that the specific path came straight up from R3 then everything would be fine
Ospf will advertise a long prefix which made EIGRP more preferable
