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24
Replies

no EIGRP neighship is being formed.

prabinchand
Level 1
Level 1

Hello EXPERTS,

I have configured EIGRP 100 on HEAD-OFFICE and BRANCH-1 but no neighborship is formed. OR i haven't understood the routing properly, if so, please make me clear. I will be very thankful to you guys!!.

 

Topology is attached below.

no any config shoud be applied on ISP side.

 

CONFIGURATION

ISP-INTERNET:

version 15.1

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname Router

!

!

!

!

!

!

!

!

ip cef

no ipv6 cef

!

!

!

!

license udi pid CISCO2911/K9 sn FTX15245A44-

!

!

!

!

!

!

!

!

!

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface GigabitEthernet0/0

no ip address

duplex auto

speed auto

shutdown

!

interface GigabitEthernet0/1

no ip address

duplex auto

speed auto

shutdown

!

interface GigabitEthernet0/2

no ip address

duplex auto

speed auto

shutdown

!

interface Serial0/3/0

ip address 1.1.1.2 255.255.255.252

clock rate 2000000

!

interface Serial0/3/1

ip address 2.2.2.2 255.255.255.252

clock rate 2000000

!

interface Vlan1

no ip address

shutdown

!

ip classless

ip route 0.0.0.0 0.0.0.0 2.2.2.1

ip route 0.0.0.0 0.0.0.0 1.1.1.1

!

ip flow-export version 9

!

!

!

no cdp run

!

!

!

!

!

!

line con 0

!

line aux 0

!

line vty 0 4

login

!

!

!

end


 

HEAD-OFFICE:

 

!

version 15.1

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname HEAD-OFFICE

!

!

!

!

!

!

!

!

no ip cef

no ipv6 cef

!

!

!

!

license udi pid CISCO2911/K9 sn FTX1524JH3H-

!

!

!

!

!

!

!

!

!

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface GigabitEthernet0/0

ip address 192.168.10.1 255.255.255.0

duplex auto

speed auto

!

interface GigabitEthernet0/1

ip address 192.168.20.1 255.255.255.0

duplex auto

speed auto

!

interface GigabitEthernet0/2

ip address 192.168.50.1 255.255.255.0

duplex auto

speed auto

!

interface Serial0/3/0

ip address 1.1.1.1 255.255.255.252

!

interface Serial0/3/1

no ip address

clock rate 2000000

shutdown

!

interface Vlan1

no ip address

shutdown

!

router eigrp 100

network 192.168.10.0

network 192.168.20.0

network 1.1.1.0 0.0.0.3

network 192.168.50.0




!

ip classless

!

ip flow-export version 9

!

!

!

!

!

!

!

!

line con 0

!

line aux 0

!

line vty 0 4

login

!

!

!

end


BRANCH-1:

 

Current configuration : 1226 bytes

!

version 15.1

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname BRANCH-1

!

!

!

enable secret 5 $1$mERr$aI/DxI917YEQARn3zkBDJ0

!

!

!

!

!

aaa new-model

!

aaa authentication login default group radius local

!

!

!

aaa accounting exec default start-stop group radius

!

!

!

!

ip cef

no ipv6 cef

!

!

!

!

license udi pid CISCO2911/K9 sn FTX1524NG67-

!

!

!

!

!

!

!

!

!

ip ssh version 2

ip domain-name cisco.com

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface GigabitEthernet0/0

ip address 192.168.30.1 255.255.255.0

duplex auto

speed auto

!

interface GigabitEthernet0/1

no ip address

duplex auto

speed auto

shutdown

!

interface GigabitEthernet0/2

no ip address

duplex auto

speed auto

shutdown

!

interface Serial0/3/0

no ip address

clock rate 2000000

shutdown

!

interface Serial0/3/1

ip address 2.2.2.1 255.255.255.252

!

interface Vlan1

no ip address

shutdown

!

router eigrp 100

network 192.168.30.0

network 2.2.2.0 0.0.0.3




!

ip classless

!

ip flow-export version 9

!

!

!

!

radius-server host 192.168.20.2 auth-port 1645 key i@mradius

!

!

!

!

line con 0

!

line aux 0

!

line vty 0 4

line vty 5 10

login authentication default

!

!

!

end


 

3 Accepted Solutions

Accepted Solutions

Hello,

 

--> I am doing this lab on my own

 

Are you following any instructions at all, or did you come up with the topology (and subsequent question) by yourself ? We are under the assumption that you are following a scripted lab. If that is not the case, the answer is simply: no, it won't work. As @paul driver mentioned, you need a common subnet between EIGRP neighbors.

View solution in original post

Hello @prabinchand ,

a point to point GRE tunnel is enough because you have only one HQ router and one Branch.

You will run EIGRP over the internal subnet in the p2p GRE tunnel

 

Hope to help

Giuseppe

 

View solution in original post

The original poster has created a set of mutually contradictory requirements. The Head Office knows 3 connected LAN subnets and a potential transit network over the serial interface. But it has no other routing knowledge. The Branch knows 1 connected LAN subnet and a potential transit network over the serial interface. So both the Head Office and the Branch know locally connected subnets but have no routing logic for anything remote. And the other condition is: 

Condition is no any static route shoud be used on BRANCH and HEAD-OFFICE.

Given this requirement there is no way for this project to work.

For this project to work either the ISP router needs additional routing information, in particular if the ISP router would run EIGRP with the other 2 routers it would be successful. Or if the Head Office and Branch had some default route it would be successful. Or if the Head Office and the Branch had a route for the transit network of the other side it would work. But with the current restrictions I do not see any way that it could work.

HTH

Rick

View solution in original post

24 Replies 24

Hello,

 

what are the requirements ? If your ISP router is not running EIGRP, the only way for the head and branch routers to form a neighborship is by configuring e.g. DMVPN.

How can BRANCH communicate with HEAD-OFFICE if it doesn't knows the route.

Condition is no any static route shoud be used on BRANCH and HEAD-OFFICE.

Hello,

 

what is the full project ? Post the full requirements.

REQUIREMENTS:

head office & branch should not use static route instead it should be EIGRP for routing. This is the main requirement of this project.

 

But i am wondered, if branch dont know the network 1.1.1.0/32 and vice-verse, how it could communicate using dmvpn ?

Hello,

 

post your "zipped Packet Tracer project (.pkt) file". Maybe there is a way to use a tunnel, without requiring static routes.

Hello,

 

this is a different topology than the one you originally described. Are you sure you sent the correct file ?

yes sir, this is correct file. ONLY THE CHANGE IS TUNNEL INTERFACE has been configured as per other EXPERTS suggestions.

The file you sent has no ISP router, just a switch. The original file had an ISP router in the middle.

Hello @prabinchand ,

a point to point GRE tunnel is enough because you have only one HQ router and one Branch.

You will run EIGRP over the internal subnet in the p2p GRE tunnel

 

Hope to help

Giuseppe

 

yes, GRE is possible in p2p but what is there is no p2p , isp provided 2 networks for HEAD OFFICE AND BRANCH.

 

what should i do, when 2 networks are not in same subnet and cannot use static routes between them, only option is EIGRP.

In that case what should i do ???

 

GRE will not work until it finds its path to reach it's other end.

I am wondered, if branch dont know the network 1.1.1.0/32 and vice-verse, how it could communicate using dmvpn ?

Hello

for eigrp adjacency to form the rtrs need to share a common subnet and in your post this doesn’t seem to be the case!


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Kind Regards
Paul
Review Cisco Networking for a $25 gift card