EIGRP over Frame relay

As i continuing my journey towards my ccnp route i made a lab to test my skills in EIGRP over the frame relay  networks

First when i configured i got two problems to get the full convergence over frame-relay so i had to read a little bit more about the frame-relay.The two issues are

Split Horizon: Don't send the route update on the same interface it has received on.

In frame relay HUB and SPOKE setup the spoke to spoke communication happen through HUB so if there are any networks behind SPOKES those networks cannot be sent to other spoke because of split horizon.so i disabled this both on interface and subinterface of  HUB.

HUB:
interface Serial0/1
 no ip address
 encapsulation frame-relay
 no ip split-horizon eigrp 90
!
interface Serial0/1.1 multipoint
 ip address 10.2.0.1 255.255.255.248
 no ip split-horizon eigrp 90



EIGRP sends "HELLO" on every 60 seconds on frame relay network and 3 times of it is "HOLD DOWN" timer which is 180 seconds and these "HELLO's" are sent to multicast address "224.0.0.10" we know that frame-relay is "non-broadcast multiple access(NBMA)" which it doesn't allow broadcast or multicast address so it uses "pseudo broadcast"which a kind of broadcast which mainly depends on frame-relay map commands.

So while configuring frame relay maps make sure that all the commands ends with broadcast.

EXAMPLE:
frame-relay map ip 10.2.0.2 102 broadcast
frame-relay map ip 10.2.0.3 103 broadcast

If we dont configure with broadcast word at the end of the frame-relay map then router adjacency flaps.i removed  "frame-relay map ip 10.2.0.3 103 broadcast" map command on HUB and configured as "frame-relay map ip 10.2.0.3 103" and you will observe the following error.

*Mar  1 00:23:34.131: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 90: Neighbor 10.2.0.3 (Serial0/1.1) is down: retry limit exceeded
HUB#
*Mar  1 00:23:38.319: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 90: Neighbor 10.2.0.3 (Serial0/1.1) is up: new adjacency

configurations

HUB:
interface Serial0/1
 no ip address
 encapsulation frame-relay
 no ip split-horizon eigrp 90
 serial restart-delay 0
!
interface Serial0/1.1 multipoint
 ip address 10.2.0.1 255.255.255.248
 no ip split-horizon eigrp 90
 frame-relay map ip 10.2.0.2 102 broadcast
 frame-relay map ip 10.2.0.3 103 broadcast
!

router eigrp 90

network 10.2.0.1 0.0.0.0

no auto-summary

SPOKE1:
interface Serial0/0
 ip address 10.2.0.2 255.255.255.248
 encapsulation frame-relay
 serial restart-delay 0
 frame-relay map ip 10.2.0.1 201 broadcast
 frame-relay map ip 10.2.0.3 201 broadcast
!
router eigrp 90 
network 10.2.0.2 0.0.0.0 
no auto-summary

SPOKE2:

interface Serial0/0
 ip address 10.2.0.3 255.255.255.248
 encapsulation frame-relay
 frame-relay map ip 10.2.0.1 301 broadcast
 frame-relay map ip 10.2.0.2 301 broadcast

!

router eigrp 90
 network 10.2.0.3 0.0.0.0
 network 10.3.0.2 0.0.0.0
 no auto-summary