RE: MVPN - tunel source address

My thought was it may have been a higher IP it chooses. If you make the
loopback 125.0.0.1 or something like that will it choose the loopback in
that instance? The most important thing is you know the fix and that it was
a version issue. Don't hang up on it too long because other important tasks
to accomplish. But that would be my only other thought.

Regards,

Tyson Scott - CCIE #13513 R&S, Security, and SP

Managing Partner / Sr. Instructor - IPexpert, Inc.

Mailto: <mailto:tscott_at_ipexpert.com> tscott_at_ipexpert.com

From: NN Kumar [mailto:nagendra.cisco_at_gmail.com]
Sent: Thursday, June 10, 2010 11:32 AM
To: Tyson Scott
Cc: Cisco certification
Subject: Re: MVPN - tunel source address

Hi Tyson,

The other addresses are 124.1.1.1/32 and 124.1.13.0/24.

Regards,
Nagendra

On Wed, Jun 9, 2010 at 6:03 PM, Tyson Scott <tscott_at_ipexpert.com> wrote:

What are the other addresses on the device?

Regards,
 
Tyson Scott - CCIE #13513 R&S, Security, and SP
Managing Partner / Sr. Instructor - IPexpert, Inc.
Mailto: tscott_at_ipexpert.com

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of NN
Kumar
Sent: Wednesday, June 09, 2010 8:50 PM
To: Cisco certification
Subject: MVPN - tunel source address

Hi All,

While configuring MVPN, I observed that sometimes (may be with older IOS
version) the source address for the MDT tunnel interface will be non
loopback address with the below log message,

09:18:33: %MDT-4-LBSRC: MDT ATM4/0.12 uses source address 124.1.12.1 from a
non-loopback interface
09:18:33: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel2, changed
state to up
09:18:33: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel2, changed
state to up

I know that configuring "bgp next-hop loopback" command under VRF will solve
the issue. But I am looking for the reason behind selecting non loopback
address.

I remember reading some document where it mentions that with older version,
when we have both external and internal VPNv4 neighborship established, MDT
tunnel will prefer eBGP VPNv4 source address. But when I tried without eBGP
VPNv4, I still see that the source address is non loopback.

Can someone please explain the concept behind this?

Regards,
Nagendra

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Received on Thu Jun 10 2010 - 11:40:20 ART