[j-nsp] bgp routes from inet.0 to virtual router instance

[aayan sulehri]

Hi Stefan.
if u please provide me some sample , i will thanks ful.
let me try to show my config as well and what i want to achieve. find attach
is my topology,
and my concerns to force udp traffic initiate from R1---R4----R5---R3----T1
and return from same path back. However all other traffic should go like
http, icmp from R1---R4---R3----T1. I have tried instance type forwarding
and it do work, but I want to achieve with instance type virtual router and
with ospf neigbour ship. R4 and R5 are connected across the switch and want
to run ospf in between in order to detect link failure . for testing purpose
I have one link only.
1- Router 4 having firewall filter on interface connected to R1 to
redirecting all udp traffic , like trace route to R5.
2- on R4 virtual-router instance configured with ospf , as well export polcy
of bgp active routes present in inet.0. R4 should advertise active bgp route
to R5 for return traffic.
3- R5 has one default route pointing to R3 ,however should receive bgp
routes from R4 for return traffic.
for return traffic , R3 has almost same thing , R3 having firewall filter on
interface connected to T1 to redirecting all udp traffic , like trace route
to R5.
*** here is my config on R4 .

routing-instances {
            udp {
                instance-type virtual-router;
                interface ge-0/0/0;
                routing-options {
                    static {
                        route 0.0.0.0/0 next-hop 10.0.2.9;
                    }
                }
                protocols {
                    ospf {
                        export bgp-route;
                        area 0.0.0.0 {
                            interface ge-0/0/0;
                        }
                    }
                }
            }
        }
        routing-options {
            interface-routes {
                rib-group inet REDIRECT;
            }
            rib-groups {
                REDIRECT {
                    import-rib [ inet.0 udp.inet.0 ];

policy-options {
            policy-statement bgp-route {
                term 1 {
                    from {
                        protocol bgp;
                        route-filter 200.200.0.0/16 exact;
                    }
                    then accept;
                }

**** my active bgp routes on R4 that I want to advertise to R5 are
run show route 200.200/16

inet.0: 27 destinations, 29 routes (27 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

200.200.0.0/16     *[BGP/170] 00:00:06, localpref 100
                      AS path: 65010 I
                    > to 172.16.0.6 via ge-0/0/1.0
**** R4 and R5 having neighbor, but R5 not receiving routes from R4.
[edit]
root at R4# run show ospf neighbor  instance IN
Address          Interface              State     ID               Pri  Dead
10.0.2.9         ge-0/0/0.0                Full      10.0.3.5         128
39

[edit]
root at R5# run show ospf neighbor
Address          Interface              State     ID               Pri  Dead
10.0.2.10       ge-0/0/0.0                 Full      10.0.2.10        128
33

[edit]
root at R5# run show route protocol ospf

inet.0: 12 destinations, 12 routes (12 active, 0 holddown, 0 hidden)
Restart Complete
+ = Active Route, - = Last Active, * = Both

224.0.0.5/32       *[OSPF/10] 00:04:20, metric 1
                      MultiRecv

iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
Restart Complete

Regards.






On Mon, Nov 23, 2009 at 12:35 AM, Stefan Fouant <
sfouant at shortestpathfirst.net> wrote:

> > -----Original Message-----
> > From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-
> > bounces at puck.nether.net] On Behalf Of aayan sulehri
> >
> > Hi Experts
> > usually PBR routing can achieve by instance type forwarding. However I
> > am
> > trying to create PBR using virtual router instance, My concern to
> > create PBR
> > as well as OSPF neigbour ship with attached router.
> > I have large number of bgp routes in inet.0 table, my concern to
> > redistribute active bgp route in virtual instance and advertise to
> > neigbour
> > router.
> > Please help and briefy explain how i can achieve this.
>
> I have some configs around here which I can dig up, but as a point of
> reference you are going to want to use rib-groups to copy routes from
> inet.0
> into your Virtual Router routing instance.  You can also use a rib-group to
> copy routes from your Virtual Router routing instance back into inet.0, or
> simply use a static default route in your Virtual Router routing instance
> with a next-table of inet.0.  You can also use a policy to constrain the
> routes you want to leak between inet.0 and your routing-instance and
> vice-versa.  There are a lot of different ways you can skin this cat.  Let
> me see if I can dig up my configs...
>
> Stefan Fouant
> www.shortestpathfirst.net
> GPG Key ID: 0xB5E3803D
>
>