EIGRP, not all subnets are displayed

[Akila]

so i configured all the network interfaces and EIGRP networks on all 3 routers, but in IP route table 192.168.5.40, 192.168.5.24, and 192.168.5.56 subnets does now show up. it shows the 192.168.5.24/28 as 192.168.5.16/28. i only configured a 192.168.5.16/29 network 

this is my subnetting scheme,

[Georg Pauwen]

Hello,

post your zipped Packet Tracer project (.pkt) file.

[Georg Pauwen]

Hello,

two of your routers had 'auto-summary' enabled. If you want to be sure that all networks are advertised, use the 'network 0.0.0.0' command.

Attached the revised file.

[Akila]

sorry, I couldn't open your file which version of the PT are you using thank you, and I also used the network 0.0.0.0 command and it didn't work.
thank you

[Georg Pauwen]

Hello,

I am using version 7.3.

Either way, make sure all three routers have the below configured:

router eigrp 1

no auto-summary

[Akila]

Sorry for bothering you again, I configured no auto-summary on all 3 routers but it still doesn't show those students,

[Akila]

one more thing how come the routeing table shows a 192.168.5.32 network when i didn't configured any, thank you

[Georg Pauwen]

Hello,

I see what's going on. If you want to see the 24/40/56 networks, you need to change the subnet masks to 255.255.255.248 masks. Have a look at the below:

R4

interface FastEthernet0/0
ip address 192.168.5.25 255.255.255.240

--> subnet 192.168.5.16
--> address range 192.168.5.17 - 192.168.5.30

!
interface FastEthernet1/0
ip address 192.168.5.41 255.255.255.240

--> subnet 192.168.5.32
--> address range 192.168.5.33 - 192.168.5.46

Change the mask:

interface FastEthernet0/0
ip address 192.168.5.25 255.255.255.248

--> subnet 192.168.5.24
--> address range 192.168.5.25 - 192.168.5.30

!
interface FastEthernet1/0
ip address 192.168.5.41 255.255.255.248

--> subnet 192.168.5.40
--> address range 192.168.5.41 - 192.168.5.46

R3

interface FastEthernet0/0
ip address 192.168.5.57 255.255.255.224

--> subnet 192.168.5.32
--> address range 192.168.5.33 - 192.168.5.62

Change the mask:

interface FastEthernet0/0
ip address 192.168.5.57 255.255.255.248

--> subnet 192.168.5.56
--> address range 192.168.5.57 - 192.168.5.62

[Akila]

if it's not too much trouble could you please explain why I can't use 240 subnets and is there a way around it because I need at least 10 usable IPs in each subnet. 
thank you

[Georg Pauwen · Accepted solution]

Hello,

you can use /28 (255.255.255.240) subnets, but if you use them, the only 'issue' is that with these subnets, you are not propagating the 24/40/56 subnets you are expecting. Simply because they are not there. Have a look at my previous post again. The easiest way to find out which subnets you have actually configured is to do a 'show ip route' and look at the connected networks. With the /28 mask, there are no 24/40/56 networks, with the /29 mask, there are.

[Akila]

thank you so much for taking time out of your schedule to reply to this thread,
hope you have a great week