Hello,

morialpesh008 · ‎01-13-2017

hi,

i have created following topology of frame relay.

create serial sub-interface 0/0/0.1 multipoint link on R1 and assign three DLCI to it for other end three routers

i could ping R2,R3 and R4 form R1 and all frame relay PVD has been activated

as per my knowledge if i want to communicate between all router then need IGP so i create EIGRP on all router and disable splite horizone on serial sub-interface, so it can send all route out through.

in R1 i show all route of R2,R3 and R4, but problem is in R2 routing table R3 and R4 route not reflected and so on in R3 and R4. even i disable splite horizone.

lo0 is created on all router mentioned in image.

R1 serial int configuration and route table

interface Serial0/0/0

no ip address

no ip split-horizon

encapsulation frame-relay

clock rate 2000000

!

interface Serial0/0/0.1 multipoint

ip address 10.0.0.1 255.255.255.0

no ip split-horizon

frame-relay interface-dlci 100

frame-relay interface-dlci 200

frame-relay interface-dlci 300

clock rate 2000000

Router#show ip route

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

* - candidate default, U - per-user static route, o - ODR

P - periodic downloaded static route

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

C 10.0.0.0/24 is directly connected, Serial0/0/0.1

L 10.0.0.1/32 is directly connected, Serial0/0/0.1

172.0.0.0/16 is variably subnetted, 2 subnets, 2 masks

C 172.0.0.0/24 is directly connected, Loopback0

L 172.0.0.1/32 is directly connected, Loopback0

D 192.168.0.0/24 [90/2297856] via 10.0.0.2, 00:40:56, Serial0/0/0.1

D 192.168.1.0/24 [90/2297856] via 10.0.0.3, 00:45:22, Serial0/0/0.1

D 192.168.2.0/24 [90/2297856] via 10.0.0.4, 00:45:22, Serial0/0/0.1

R2 routing table

Router>show ip route

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

* - candidate default, U - per-user static route, o - ODR

P - periodic downloaded static route

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

C 10.0.0.0/24 is directly connected, Serial0/0/0

L 10.0.0.2/32 is directly connected, Serial0/0/0

172.0.0.0/24 is subnetted, 1 subnets

D 172.0.0.0/24 [90/2297856] via 10.0.0.1, 00:42:35, Serial0/0/0

192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.0.0/24 is directly connected, Loopback0

L 192.168.0.1/32 is directly connected, Loopback0

Georg Pauwen · ‎01-13-2017

Hello,

is this your actual configuration ? Try specifying the EIGRP process in the command:

no ip split-horizon eigrp x

morialpesh008 · ‎01-14-2017

Hello,

yes this is actual configuration,

i have running on packet tracer 7 and under interface it support only no ip splite horizone command not no ip splite horizone eigrp as no .

also have neighbour ship with all three router see neighbour command result from R1

R1#show ip eigrp neighbors

IP-EIGRP neighbors for process 1

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 10.0.0.4 Se 12 01:27:37 40 1000 0 9

1 10.0.0.3 Se 14 01:27:37 40 1000 0 9

2 10.0.0.2 Se 12 01:23:11 40 1000 0 3

Georg Pauwen · ‎01-14-2017

Hello,

Packet Tracer doesn't support that command. Try using point-to-point subinterfaces, or better yet, move to GNS3, which is a free simulation program that uses full IOS images.

https://www.gns3.com/

morialpesh008 · ‎01-14-2017

hi,

then what is the different between point to point and point to multi point and in what circumstances i have to use what interface type?

as per my knowledge if u want to configure more then one DLCI on interface then u want to choose point to multi-point coz under point to point is allow you to configure only one DLCI.

Georg Pauwen · ‎01-14-2017

Hello,

point-to-point (sub) interfaces are equal to using separate physical interfaces, so you wouldn't need split horizon. Point-to-multipoint is basically a one-to-many setup, and split horizon determines that you cannot send out routing updates through the same interface they were received on. That is why your original setup doesn't work.

I hope that makes sense.

When to use which depends on the situation. The link below has a pretty good explanation:

http://techdifferences.com/difference-between-point-to-point-and-multipoint-connection.html

Frame splite horizone