EIGRP

Question 1

Name the different methods of EIGRP filtering

Answer 1

1. Distribute List
2. Offset List
3. Route-tag
4. Passive Interface
5. Per-Neighbor Prefix limit
6. Maximum Hops
7. (Admin) Distance per neighbor and also specify prefix

Question 2

Describe steps required to all block routes from a specific neighbor y (using prefix-list)

Answer 2

1. Create prefix-list 1 permitting all
2. Create 2nd prefix-list 2 denying neighbor y address then permitting all
3. Use the distribute command: distribute-list prefix gateway in

Question 3

Describe steps required to block route x from a specific neighbor y (using access-list)

Answer 3

1. Create access-list 100 denying ip host y host x. Then 2nd line permit all
2. Use the distribute command: distribute-list 100 in

Question 4

Explain EIGRP add path feature and also what you need to do to configure it in DMVPN.

Answer 4

• Distance vector behavior is to only forward on its best path to its neighbor, therefore even if it has equal two routes in its table for a prefix it will only forward one to its neighbor.
• Add-path makes sure additonal paths are advertised
• To configure if you use “add-path 1” command means add one more path to existing path which then means 2 paths. In DMVPN you have to use command “no next-hop-self no ecmp mode” for add paths to work