Lab 61 - EIGRP Timers

Prerequisites: CCNP level skills.

Topology

Pic. 1 - Topology Diagram.

Icons designed by: Andrzej Szoblik - http://www.newo.pl

Task1
Configure R1 to send hello towards R3 every 2 seconds on S0/1 interface. THe hold interval should be 3 times the hello timer. Do not change timers on R3.

Task 2
Configure EIGRP so that the routers should respond to EIGRP Query packet within 60 seconds before the neighbor is declared SIA.

Task 3
Configure EIGRP so that the routers will hold known routes for NFS-capable neighbor for 2 minutes during switch-over operation.

Lab Solution

Task1
Configure R1 to send hello towards R3 every 2 seconds on S0/1 interface. THe hold interval should be 3 times the hello timer. Do not change timers on R3.

R1 Configuration:

!

interface Serial0/1
 ip address 10.1.13.1 255.255.255.0
 ip hello-interval eigrp 1 2
 ip hold-time eigrp 1 6
!

Note!
In EIGRP the hello and hold interval do not have to match between neighbors (for consistency sake they should be set identically though).

Task 2
Configure EIGRP so that the routers should respond to EIGRP Query packet within 60 seconds before the neighbor is declared SIA.

On All Routers:

!

router eigrp 1

  timers active-time 1

!

Task 3
Configure EIGRP so that the routers will hold known routes for NFS-capable neighbor for 2 minutes during switch-over operation.
On All Routers:

!

router eigrp 1

  timers nsf route-hold 120

!

Verification:

Pic 2 - NFS Route-Hold Timer.

Notice!
NFS route-hold timer ranges from 20-300 seconds. The default is 240 sec. and can be displayed using 'show ip protocols' command.