From: Swan, Jay (jswan@sugf.com)
Date: Fri Dec 29 2006 - 18:02:34 ART
I believe you cannot have EIGRP running over two GRE tunnels that
terminate on the same loopback interfaces without this happening. I
actually tried to do this in an odd real world scenario a few years ago,
and that was the answer that came back from the TAC escalation team. We
had to create separate loopback interfaces to terminate each tunnel.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
John Matus
Sent: Friday, December 29, 2006 9:47 AM
To: prashant shukla
Cc: ccielab@groupstudy.com; nobody@groupstudy.com
Subject: Re: EIGRP_over 2-Tunnels, complains " not on common subnet".
try using tunnel destination of "loopback0" instead of using the ip
address of the interface.
Regards,
John D. Matus
Technical Support / PAS
Fujitsu Consulting
626-568-7716
John.Matus@tokiom.com
prashant shukla <shukla_cisco@yahoo.co.in> Sent by:
nobody@groupstudy.com
12/29/2006 06:29 AM
Please respond to
prashant shukla <shukla_cisco@yahoo.co.in>
To
ccielab@groupstudy.com
cc
Subject
EIGRP_over 2-Tunnels, complains " not on common subnet".
Gurus,
I have a simple 2 routers over a serial link.
i create 2 Tunnels between them , if i keep the "tunnel Source" and
"tunnel dest" to exactly same as Loopback 0 , Eigrp complains regarding
"neigh not on common subnet" if i keep then diff , as in 2 diff
sources/dests , its works.
I know its got to do with primary IP add space, cant feel the real
pulse
here.
config on R1:
interface Loopback0
ip address 1.1.1.1 255.255.255.255
no ip directed-broadcast
no clns route-cache
!
interface Tunnel0
ip address 128.1.1.2 255.0.0.0
no ip directed-broadcast
no clns route-cache
tunnel source Loopback0
tunnel destination 2.2.2.2
!
interface Tunnel1
ip address 129.1.1.100 255.0.0.0
no ip directed-broadcast
no clns route-cache
tunnel source Loopback0
tunnel destination 2.2.2.2
!
interface Serial0/0
ip address 172.16.1.100 255.255.0.0
no ip directed-broadcast
no clns route-cache
same config at R2 too.
Shukla.
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