RE: Lab1 Cisco r&s Prac Labs - BGP

From: john matijevic (matijevi@bellsouth.net)
Date: Fri Sep 10 2004 - 14:34:30 GMT-3

Hello Jean,
Rip uses 224.0.0.9 multicast on port 520, that is why you seen the
muticast address along with the port, to convert the multicast to
unicast.
This is the nat config you should have:
ip nat outside source static udp 172.16.0.1 520 224.0.0.9 520 on R3.

You should also have ip nat outside on interface FastEthernet0/0.

Can you please verify that you have ip nat outside on that interface?

Sincerely,
John Matijevic, CCIE #13254, MCSE, CNE, CCEA
CEO
IgorTek Inc.
151 Crandon Blvd. #402
Key Biscayne, FL 33149
Hablo Espanol
305-321-6232
http://home.bellsouth.net/p/PWP-CCIE
 

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
jean.paul.baaklini@accenture.com
Sent: Friday, September 10, 2004 5:20 AM
To: james@towardex.com
Cc: ccielab@groupstudy.com
Subject: RE: Lab1 Cisco r&s Prac Labs - BGP

That one is a bit tricky, it was very well explained few weeks ago in a
post (sorry I don't remember who).
You should first convert nicest to multicast in order to create a
translation in the nat table that the return traffic (from r3 to r2) can
use to translate multicast into unicast. This works on my rack, but a
bit too well unfortunately. I wonder if it is possible to translate only
520/udp traffic...

Thanks for your comments.

Cheers,
JP

-----Original Message-----
From: James [mailto:james@towardex.com]
Sent: 10 September 2004 10:11
To: Baaklini, Jean paul
Cc: ccielab@groupstudy.com
Subject: Re: Lab1 Cisco r&s Prac Labs - BGP

On Fri, Sep 10, 2004 at 11:06:08AM +0200,
jean.paul.baaklini@accenture.com wrote:
> Hi,
>
> I'm using static NAT , something like:
> ip nat outside source static udp 172.16.0.1 520 224.0.0.9 520 .

I think you got it reversed...

I think it is:
ip nat out so stat udp 224.0.0.9 520 172.16.0.1 520

You are trying to convert multicast destination into unicast.

HTH,
-J 

-- 
James Jun                                            TowardEX
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