EIGRP

[morialpesh008]

Hi,

  I have some confusion please see the below packet tracer snap and topology table metric of 10.0.2.0 network from R0

P 10.0.2.0/24, 1 successors, FD is 3072

via 10.0.1.2 (3072/2816), GigabitEthernet0/0

via 10.0.0.2 (2170112/2816), Serial0/0/0

it showing that there are two path to network 10.0.2.0 one via 10.0.1.2(Router R4) adn one from 10.0.0.0(Router R5)

my question is why it dint choose path from Router0-Router3-Router5 and rhen network 10.0.2.0

or From Router2-Router-4-and then network 10.0.2.0?

As per my knowledge EIDRP choose path upon metric base ans even all other path metric is less then serial link then why dint is choose in topology table,  

All setting of eigrp set default and only one serial link between R0-R5 all other are Gig link.

Thanks.

[Milos Megis]

Hi,
is it output of command: show ip eigrp topology all-links ?

[morialpesh008]

Hi,

  Yes it's the output of show ip eigrp topology all links...

Router#sh ip eigrp topology all-links

IP-EIGRP Topology Table for AS 10/ID(10.0.3.1)

P 10.0.2.0/24, 1 successors, FD is 3072

via 10.0.1.2 (3072/2816), GigabitEthernet0/0

via 10.0.0.2 (2170112/2816), Serial0/0/0

Thanks.

[Milos Megis]

And what is output of command: show ip eigrp neighbors ?

[morialpesh008]

Here is,

Router#sh ip eigrp neighbors

IP-EIGRP neighbors for process 10

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 10.0.1.2 Gig0/0 14 00:07:31 40 1000 0 11

1 10.0.3.2 Gig0/1 10 00:07:31 40 1000 0 15

2 10.0.0.2 Se0/0/0 11 00:07:21 40 1000 0 15

[Milos Megis]

I tried to simulate this topology in GNS3 (just addded IP address on interfaces and turn on EIGRP - auto sumarization is ON by default) and I got following output for network 10.0.2.0/24 (as expected):

R1#sh ip ei to al
IP-EIGRP Topology Table for AS(10)/ID(10.0.3.1)

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status

P 10.0.2.0/24, 1 successors, FD is 284160, serno 8
via 10.0.1.2 (284160/28160), FastEthernet0/1
via 10.0.0.2 (2195456/281600), Serial0/0
via 10.0.3.2 (286720/30720), FastEthernet0/0

So you had to make some mistake.

Check if you see all neighbors on all routers.

[morialpesh008]

Hi...Megis

    i have configure same topology in GNS3 but it showing me same output that I have been seeing in packet tracer, i don't know how are you got this output.

also one thing that i have noticed is, i configured offset list on R0 for increase the RD of network 10.0.2.0 and after that route through 10.0.3.2 for network 10.0.2.0 is showing in topology table.

i read somewhere that if the RD of the any network is equal or more then FD of that route then it's not showing in topology table because it's neither successor or feasible successor but also one fact is the all possible routes showing using sh ip ei to al but in my case it's not showing in packet tracer and also in GNS3.