Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Can't ping hosts across eigrp

Hi,

 

  Using Packet Tracer, I'm trying to ping hosts across a simple eigrp but attempts fail.  Hosts can ping their respective routers and one host (PC10) can ping a third (PC11) through ripv2 with no difficulty.  I'm including the .pkt for reference.  Specifically, PC10 cannot ping PC12 across Router_2 and Router_3.

 

Any thoughts?

1 ACCEPTED SOLUTION

Accepted Solutions

HelloApologies i didn't even

Hello

Apologies i didn't even notice the the inconsistency of the ip addresses

 

why do you have the physical interfaces in different subnets ?

change the IP address to the same subnet 

Res

paul

Please don't forget to rate any posts that have been helpful. Thanks.
8 REPLIES

Hi, I guess the interface

Hi,

 

I guess the interface connecting R2 and R3 is configured with different ip subnet ranges, where it lacks with eigrp[ formation between the routers. Please check and make neccessary change to make it work.

Hope this helps.

Regards

Karthik

HelloCan you post the config

Hello

Can you post the config of the eigrp routers please

 

res

Paul

Please don't forget to rate any posts that have been helpful. Thanks.
New Member

Router_2:interface Serial0/1

Router_2:

interface Serial0/1
 ip address 172.26.1.1 255.255.255.0

router eigrp 90
 network 192.168.0.0
 network 172.27.0.0
 auto-summary

 

Router_3:

interface Serial0/1
 ip address 172.27.1.1 255.255.255.0

router eigrp 90
 network 192.168.0.0
 network 172.26.0.0
 auto-summary

Helloboth rtrsRouter eigrp

Hello

both rtrs

Router eigrp 90

no auto-summary

 

res

paul

Please don't forget to rate any posts that have been helpful. Thanks.
New Member

Sorry to say that didn't work

Sorry to say that didn't work.

Mind you, it allowed me to discover there was no adjacency being made because the serial interfaces were on different subnets (172.26.x.x vs 172.27.x.x).  Having set them to 172.27.1.1/24 (R2) and 172.27.1.2/24 (R3), adjacencies were formed but...

pinging the hosts still won't work.

 

HelloApologies i didn't even

Hello

Apologies i didn't even notice the the inconsistency of the ip addresses

 

why do you have the physical interfaces in different subnets ?

change the IP address to the same subnet 

Res

paul

Please don't forget to rate any posts that have been helpful. Thanks.
New Member

Turns out the mistake was not

Turns out the mistake was not adding a mask to the subnet. Ex:

Router_2(config_router)# network 192.168.0.0 0.0.255.255

Router_2(config_router)# network 172.27.0.0 0.0.255.255

 

Doing that on both routers made the hosts capable of pinging each other.

 

Thanks for the tips everyone smiley

Good to know that you issue

Good to know that you issue is resolved

 

Regards

Karthik

1054
Views
0
Helpful
8
Replies
CreatePlease login to create content