inter as vpnv4

[Muhammad Thanveer]

Hello Folks,

In inter AS VPNV4 we will form a egbp vpnv4 neighbor relation ship.

In IOS XR what is the way to achieve it?

Am I correct going this way

route-policy EBGP (in both the routers)

pass

end-policy

commit

R1 (10.10.10.1)------------------------(10.10.10.2) R2

conf t                                                                 conf t

router bgp 1                                                       router bgp 10

neighbor 10.10.10.2                                        neighbor 10.10.10.1

remote-as 10                                                   remote-as 1

address-family vpnv4 uni                                 address-family vpnv4 uni

route-policy EBGP in                                      route-policy EBGP in

route-policy EBGP out                                     route-policy EBGP out                                    

exit-address-family                                           exit-address-family    

commit                                                                commit                                

Is ther any static route necessary here and if so then why?

I Will rate all helpful posts

Regards
Thanveer
"Everybody is genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is a stupid."       

[Harold Ritter]

Hi Thanveer,

Here's a rough working example:

r1 (gi0/0/0/0) <++++++++> (gi0/0/0/0) r2

r1:

!

interface GigabitEthernet0/0/0/0

ipv4 address 192.168.12.1 255.255.255.0

!

route-policy accept-all

  pass

end-policy

!

router static

address-family ipv4 unicast

  192.168.12.2/32 GigabitEthernet0/0/0/0

router bgp 1

mpls activate

  interface GigabitEthernet0/0/0/0

!

address-family vpnv4 unicast

  retain route-target all

!

neighbor 192.168.12.2

  remote-as 2

  address-family vpnv4 unicast

   route-policy accept-all in

   route-policy accept-all out

  !

!

r2:

!

interface GigabitEthernet0/0/0/0

ipv4 address 192.168.12.2 255.255.255.0

!

route-policy accept-all

  pass

end-policy

!

router static

address-family ipv4 unicast

  192.168.12.1/32 GigabitEthernet0/0/0/0

router bgp 2

mpls activate

  interface GigabitEthernet0/0/0/0

!

address-family vpnv4 unicast

  retain route-target all

!

neighbor 192.168.12.1

  remote-as 1

  address-family vpnv4 unicast

   route-policy accept-all in

   route-policy accept-all out

  !

!

Hope this helps

[Mohammed Imran Khan · Accepted solution]

Hello Thanveer,

Just to add to Harold's answer, the IOS-XR doesn't automatically learn the directly connected "host" (/32) routes, hence you need a static route defining the "host" prefix. IOS does it automatically, XR doesn't.

In other words, label exchange can happen only if there is /32 route present, thats the reason we need it. :-)

HTH

Regards,

Imran

[Muhammad Thanveer]

Thanks Harold and Imran.

Regards
Thanveer
"Everybody is genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is a stupid."