Re: MPLS L3 VPN Questions

It may be helpful for you to watch a free 2-hour video on MPLS VPNs I
did last year. It's called MPLS 101 and it should cover all the
questions you had very nicely. You can find it here:
http://bit.ly/vLecture

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
FREE CCIE training: http://bit.ly/vLecture
Mailto: markom_at_ipexpert.com
Telephone: +1.810.326.1444
Web: http://www.ipexpert.com/
On Fri, Jun 3, 2011 at 10:01, Elliott Reyes
<fontananetworkengineer_at_gmail.com> wrote:
> Hey Guys,
>
> B  B  B  I'm just trying to get a better understanding of how to build these
> MPLS VPN's properly and I guess the documentation and INE workbook just
> confuses me a little bit. So if anyone can assist me that would be great.
>
>
> Like Denzel in the movie Philadelphia. Explain it to me like I'm a 6 year
> old.
>
> 1. When defining the VRF's between two PE routers.
>
>
> Example
>
> R1
>
> Step 1 - Create VRF locally on R1
>
> ip vrf VPN_A
>
> B rd 100:1 <---- ROUTE DISTINGUISHER (This is locally significant to R1 and
> add's a 8 byte value to IPV4 prefix to create a VPNIPV4 prefix. )
>
>
> Step 2 - Assign Route-Target command
> B route-target both 100:1 <----- allows routing information from to traverse
> from R1 VPN_A to R2 VPN_A thru their connected interfaces and import/export
> routing information.
>
> R1 <----------> R2
>
> int fa0/1 (R1)
> B ip vrf forwarding VPN_A
> B ip add 10.1.1.1 255.255.255.0
>
>
> R2
>
> Step 1 - Create VRF locally on R2
>
> ip vrf VPN_A
>
> B rd 100:1 <---- ROUTE DISTINGUISHER (This is locally significant to R2 and
> add's a 8 byte value to IPV4 prefix to create a VPNIPV4 prefix. )
>
>
> Step 2 - Assign Route-Target command
> B route-target both 100:1 <----- allows routing information from to traverse
> from R2 VPN_A to R1 VPN_A thru their connected interfaces and import/export
> routing information.
>
> Question - Does the route-target have to match the route distinguisher on
> both ends. if the route-target is say 100:2 and the route distinguisher is
> 100:1 on VPN_A this technically shouldn't work
> across the VPN correct.
>
> R2 <----------> R1
>
> int fa0/1 (R2)
> B ip vrf forwarding VPN_A
> B ip add 10.1.1.2 255.255.255.0
>
>
> thanks
>
>
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