From: Jim Brown (Jim.Brown@xxxxxxxxxxxxx)
Date: Sat Dec 29 2001 - 14:00:14 GMT-3
I'm assuming so many people developed the wrong solution because they didn't
read the all material you provided.
This is what will KILL you in the lab.
You must read and understand everything provided before developing a
solution or you run the risk of deriving the wrong solution. No partial
credit!
-----Original Message-----
From: A.Steinbock [mailto:anja10@usa.net]
Sent: Friday, December 28, 2001 11:51 PM
To: ccielab@groupstudy.com
Cc: Jim.Brown@CaseLogic.com
Subject: RE: EIGRP: Neighbor not on common subnet ]
Jim Brown, you are the King.
Among all the answers, only yours solved the problem.
Frame relay had covertly built another map between R2 & R3.
As soon as I put the "no frame inver" command on the R2 & R3's interface,
EIGRP stopped complaining.
I don't understand why so many of you concluded that the subnetmask is
wrong. R1's subinterface #2 with the IP address of 10.155.1.1/30 connects to
R2's serial interface that has 10.155.1.2/30 address. Again, R1's
subinterface #3 with the IP address of 10.155.1.5/30 connects to
R3's serial interface that has 10.155.1.6/30 address.
Thanks and Happy New Year,
Akim
Jim Brown <Jim.Brown@CaseLogic.com> wrote:
> The frame switch configuration appears to be a full mesh and more.
> While
you
> are only statically creating a map from R2-R1 and R3-R1 the wonderful
> frame-relay inverse arp facility is also creating a map between R2-R3
> without your help.
>
> If you do a show frame map, I believe you will see a dynamic mapping
between
> R2-R3 in addition to the static ones you created.
>
> This additional mapping is why you are observing the EIGRP on
> different network errors. Routers R2 and R3 are on different subnets
> so they are wondering why they are seeing hellos that aren't on their
> subnet....
>
> This error is a result of the they dynamic frame map.
>
> Disable auto mapping with no frame inverse arp under the physical
interface,
> reload, and you should be good to go.
>
>
>
> -----Original Message-----
> From: A.Steinbock [mailto:anja10@usa.net]
> Sent: Friday, December 28, 2001 8:37 AM
> To: ccielab@groupstudy.com
> Subject: EIGRP: Neighbor not on common subnet
>
>
> I am yet to figure out why I am getting this message on a very simple
> frame-relay+Eigrp setting.
>
>
> Here is the diagram and router configs:
> http://24.234.55.18/out/eigrp.jpg
>
> The frame switch config is:
> !
> interface Serial1
> no ip address
> encapsulation frame-relay
> clockrate 56000
> frame-relay lmi-type cisco
> frame-relay intf-type dce
> frame-relay route 912 interface Serial2 921
> frame-relay route 913 interface Serial3 931
> frame-relay route 914 interface Serial4 941
> frame-relay route 915 interface Serial5 951
> frame-relay route 916 interface Serial6 961
> frame-relay route 917 interface Serial7 971
> !
> interface Serial2
> no ip address
> encapsulation frame-relay
> clockrate 56000
> frame-relay lmi-type cisco
> frame-relay intf-type dce
> frame-relay route 921 interface Serial1 912
> frame-relay route 923 interface Serial3 932
> frame-relay route 924 interface Serial4 942
> frame-relay route 925 interface Serial5 952
> frame-relay route 926 interface Serial6 962
> frame-relay route 927 interface Serial7 972
> !
> interface Serial3
> no ip address
> encapsulation frame-relay
> clockrate 56000
> frame-relay lmi-type cisco
> frame-relay intf-type dce
> frame-relay route 931 interface Serial1 913
> frame-relay route 932 interface Serial2 923
> frame-relay route 934 interface Serial4 943
> frame-relay route 935 interface Serial5 953
> frame-relay route 936 interface Serial6 963
> frame-relay route 937 interface Serial7 973
> !
> on R2 I get the message:
> 01:38:16: IP-EIGRP: Neighbor 10.155.1.6 not on common subnet for
> Serial0
>
> on r3 I get the message:
> 01:38:53: IP-EIGRP: Neighbor 10.155.1.2 not on common subnet for
> Serial0
>
> I've checked CCO. although there is an explanation for it at
> http://www.cisco.com/warp/public/103/15.html
>
> but I can not relate.
> Can some one shed a light Please?
>
> TIA
> Akim
>
>
>
>
>
>
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