4.5 - Unable to form neighbor

Hi,

I hope to seek some help as R2 and R6 were unable to form neighbors

Here's my configuration:

R2

=====

router eigrp 10
 network 132.1.23.0 0.0.0.255
 network 132.1.26.0 0.0.0.255
 network 150.1.2.2 0.0.0.0
 no auto-summary
 eigrp router-id 150.1.2.2
 neighbor 132.1.26.6 FastEthernet0/0
!

R2(config-router)#do sh ip eigrp nei
IP-EIGRP neighbors for process 10
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
0   132.1.23.3              Se0/1/0           13 00:29:06   22   200  0  16

R6

======

interface FastEthernet0/0
 no ip address
 speed auto
 full-duplex
!
interface FastEthernet0/0.6
 encapsulation dot1Q 6 native
 ip address 132.1.6.6 255.255.255.0
!
interface FastEthernet0/0.26
 encapsulation dot1Q 26
 ip address 132.1.26.6 255.255.255.0
!

router eigrp 10
 network 54.1.2.6 0.0.0.0
 network 132.1.26.0 0.0.0.0
 network 150.1.6.6 0.0.0.0
 no auto-summary
 eigrp router-id 150.1.6.6
!
!
!
ip http server
no ip http secure-server
!
         
R6(config-router)#neighbor 132.1.26.2 fa0/0.26
EIGRP: Static nbr 132.1.26.2 already in AS 10 FastEthernet0/0.26
R6(config-router)#

SW2

=======

SW2#sh run int fa0/6
Building configuration...

Current configuration : 150 bytes
!
interface FastEthernet0/6
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 6
 switchport mode trunk
 switchport nonegotiate
end

SW2#

Hope to hear from anyone soon.

Thanks!

Regards,

Ron

Comments

  • router eigrp 10
     network 54.1.2.6 0.0.0.0
     network 132.1.26.0 0.0.0.0
     network 150.1.6.6 0.0.0.0
     no auto-summary
     eigrp router-id 150.1.6.6

    Your network statement is looking for an interface with the ip address of 132.1.26.0. With the wild-card mask of 0.0.0.0 eigrp or ospf will only run on interfaces that exactly match the ip address given. Change the mask to 0.0.0.255 or use the actual interface address.

  • Thanks Darrel! I got it.

    My careless mistake! :(

  • How could I avoid such messages?

    *Aug 18 02:22:38.323: IP-EIGRP(Default-IP-Routing-Table:10): Neighbor 54.1.3.254 not on common subnet for Serial0/0/0

    Change BB1 *54.0.0.0* to a more specify route?

  • I do not think that you can avoid this type of message because of the way the lab is designed. Since at the BB1 is configured with those subnets and Router6 is multicasting EIGRP messages, those subnets try to respond. What you can do is the following:

     

    router eigrp 10

    no eigrp log-neighbor-warnings

     

  • Or you can create an ACL permitting EGIRP from 54.x.x.x (BB1), and denying it from any other host.  Then apply it to the interface connecting to BB1.  I believe its actually a task at some point in the labs.

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