Junos OS

Hi everybody,

let say we have two routing instances with folloiwng routes:

INSTANCE1.inet.0

O 1.1.1.1/32 via 199.199.199.1 em0.199

O  2.2.2.2/32 via 200.200.200.1 em0.200

INSTANCE2.inet.0

O 3.3.3.3/32 via 198.198.198.1 em0.198

O 4.4.4.4/32 via 197.197.197.1 emo.197

Objective:

We must use RIP GROUP to  leak only one route 1.1.1.1/32 from INSTANCE1.inet.0 into INSTANCE2.inet.0 

Can we do that?  

I do not find any example config  where we have a granular control over what routes get leaked into a certain VRF when using RIP GROUP.

Much appreciated and have a nice weekend!!

As you noticed rib groups simply leak all the routes between routing instances.

Your other options for control of route leaking are:

Instance import

https://www.juniper.net/documentation/en_US/junos12.3/topics/example/routing-table-import.html

Or creating a logical tunnel interface and setting up a standard BGP peering.

https://www.juniper.net/documentation/en_US/junos/topics/example/logical-tunnels-configuring.html

Thanks sir

If you're already familiar with leaking routes using target communities, you can also do it between VRFs within the same router using "auto-export".

Here are sample configs from the techlibrary:

https://www.juniper.net/documentation/en_US/junos12.3/topics/example/auto-export-configuring-verifying.html

Hi Folks,
I hope the below sample configuration is usefull!

--------------------------------------------------------------------------------------------------------------
Route leaking using rib-groups (Leak routes from "instance-1" VR to "instance-2" VR)
--------------------------------------------------------------------------------------------------------------
- create a rib-group with the routing table that is to be exported as the first in the list,
and the table/tables that import these routes at the trailing end

- create a routing-policy to define the routes that will be imported. Apply this routing-policy
to the rib-groups as an "import-policy"

- To import direct routes from the "instance-1" VR, refer the rib-group under the "instance-1" VR routing-options

- To import BGP/OSPF routes from the "instance-1" VR, refer the rib-group under the "instance-1" VR protocols hierarchy
--------------------------------------------------------------------------------------------------------------

[edit routing-options]
rib-groups {
instance-1-to-instance-2 {
import-rib [ instance-1.inet.0 instance-2.inet.0 ];
import-policy instance-1-to-instance-2-rib;
}
}

[edit policy-options]
policy-statement instance-1-to-instance-2-rib {
term 1 {
from protocol direct;
then accept;
}
term 2 {
from {
protocol bgp;
route-filter 10.1.1.0/24 exact;
}
then accept;
}
term default {
then reject;
}
}

[edit routing-instances instance-1 routing-options]
interface-routes {
rib-group inet instance-1-to-instance-2;
}
[edit routing-instances instance-1 protocols bgp group EBGP family inet unicast]
rib-group instance-1-to-instance-2;

Thanks

Hello,

Rib-group allows granular filtering of prefix using import-policy statement under rib-group.
Create a policy for and apply it in the rib-group.


[edit routing-options]
  rib-groups {
      blue-to-red {
          import-rib [ blue.inet.0 red.inet.0 ];
          import-policy SPECIFIC_ONLY;  <<<<<<<<<<<<<<<<<<
      }
  }
[edit policy-options]
   policy-statement SPECIFIC_ONLY {
       term 1 {
           from {
               route-filter 0.0.0.0/0 exact;
           }
           then accept;
       }
       term 2 {
           then reject;
       }
   }

Regards,

Rahul

Please mark my solution as accepted if it helped.

Sorry but for the late response, got busy with work.

Thanks all for responses.