Re: MPLS L3VPN using bird

15 Sep 2022

      Hello,

The goal is to gain communication from a linux based host to another PE-CE by using MPLS L3VPN.

To your question:

  *   "configure the PE functionality, connecting to other PE via BGP with MPLS (AFI 1 / SAFI 128) + mpls-labeled packets"

Yes, I understand that's first step and it is done by using "vpn4 mpls" channel, am I right?
Once the BGP session is established, I see the routes in bird's vpn4 table.

  *   " CE via BGP AFI 1 / SAFI 1 (unicast) + normal IP packets"

Actually, I don't know. I understand I have to send traffic to PE so it is routed into MPLS L3VPN but I don't know how to do it. I would appreciate if you could clarify.

Thanks and Best Regards,

--------------------------------------------------

José Miguel Bentué

Support Engineer

GSM: +34649930789

FIX: +34912032938

FAX: +34916501100

Mail: josemiguel.bentue@emea.nec.com

NEC IBERICA S.L.

c/Anabel Segura, 7

28108-Alcobendas

Madrid

________________________________
From: Bird-users on behalf of Maria Matejka
Sent: Thursday, September 15, 2022 8:07 PM
To: bird-users@network.cz
Subject: Re: MPLS L3VPN using bird

Hello!

This part of MPLS is not implemented for now. Yet to clarify this, you
want to configure the PE functionality, connecting to other PE via BGP
with MPLS (AFI 1 / SAFI 128) + mpls-labeled packets and also to CE via
BGP AFI 1 / SAFI 1 (unicast) + normal IP packets?

Thanks
Maria

On 9/15/22 19:33, Jose Miguel Bentue wrote:
...
Hello,
I'm trying to establish MPLS L3VPN between bird and another router.
CE1 -- PE1 --- MPLS VPN --- PE2 -- CE2
Can anybody help me with a configuration example?
I have set the configuration at the end of the mail and can see bird
establish the BGP session and get routes in alt_ipv4_table. But I don't
see the traffic is being routed according to that table.
Thanks in advance and Best Regards
===========================================
vpn4 table alt_ipv4_table;
log syslog all;
router id 10.7.3.106;
protocol device {
         scan time 10;
}
protocol kernel {
         learn;
         persist;
         scan time 2;
         ipv4 {
                 import all;
                 export all;
         };
         graceful restart;
         merge paths on;
}
protocol bgp uplink1 {
         description "My BGP uplink";
         local 10.7.3.106 as 64516;
         neighbor 10.7.3.180 as 64513;
         ipv4 {
                 import filter {reject;};
                 export filter {accept;};
         };
         vpn4 mpls {
                 table alt_ipv4_table;
                 import all;
                 export none;
         };
         multihop;
         graceful restart;
         connect delay time 2;
         connect retry time 5;
         error wait time 5,30;
}
============================================
--------------------------------------------------
*José Miguel Bentué*
Support Engineer
------------------------------------------------------------------------
*Jose Miguel Bentue *| VAS Support Engineer | NEC Iberica S.A.U. | C/
Anabel Segura 7, Madrid, 28108, ES | t: +34912032938 | m: +34649930789 |
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