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Cisco BGP Dynamic Route Leaking feature Interaction with Juniper

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Introduction

Virtual Routing and Forwarding (VRF) tables are logically isolated entities that enable multiple VPN’s to share a common core such as Internet while keeping private networks traffic segregated from the Internet traffic.In some cases, we will need to allow global prefixes to be installed in vrf table and vice-versa. Currently this can be done by adding a static route, etc.Customers want a way to dynamically leak routes between global and vrf table. This is accomplished through the new feature BGP Dynamic Route-leaking that provides a flexibility of leaking multiple prefixes using route-policy for import and export.

Dynamic Route leaking feature is introduced to import routes from global/default vrf to non-default vrf and vice-versa.

 

 

 

Topology

 

 

 

Basic Configuration CLI

 

  • To import from default-VRF to non-default-VRF import, the following configuration is needed:

         vrf <VRF_NAME>

         address-family <ADDRESS_FAMILY>

         import from default-vrf route-policy <POLICY_NAME>

 

  • To import from non-default-VRF to default VRF, the following configuration is needed:

        vrf <VRF_NAME>

       address-family <ADDRESS_FAMILY>

       export to default-vrf route-policy <POLICY_NAME>

 

  • Policy is mandatory in both the cases.

 

 

 

Test Scenarios

1) Import from default-vrf

          i) Matching prefix

 

 

Configuration on Cisco router

route-policy dyna-route-leak-8-x

  if destination in (8.0.0.0/24) then

    pass

  endif

end-policy 

vrf vrf1

address-family ipv4 unicast

import from default-vrf route-policy dyna-route-leak-8-x

  import route-target

   1:1

  !

 

 

 

Existing Global entry for the route:

 

RP/0/RSP0/CPU0:vc#sh bgp 8.0.0.0/24                      

Wed Jan 16 10:48:52.515 PST

BGP routing table entry for 8.0.0.0/24

Versions:

  Process           bRIB/RIB  SendTblVer

  Speaker             272161      272161

Last Modified: Jan 16 10:38:15.025 for 00:10:37

Paths: (1 available, best #1)

  Not advertised to any peer

  Path #1: Received by speaker 0

  Not advertised to any peer

  65008

    192.200.1.2 (metric 2) from 6.6.6.6 (6.6.6.6)

      Origin incomplete, localpref 100, valid, internal, best, group- best, import-candidate

      Received Path ID 0, Local Path ID 1, version 272161

RP/0/RSP0/CPU0:vc#

 

Show command to see imported route in vrf1

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf1 8.0.0.0/24             

Wed Jan 16 10:49:10.665 PST

BGP routing table entry for 8.0.0.0/24, Route Distinguisher: 3.3.3.3:0

Versions:

  Process           bRIB/RIB  SendTblVer

  Speaker             258011      258011

Last Modified: Jan 16 10:38:15.025 for 00:10:55

Paths: (1 available, best #1)

  Advertised to CE update-groups (with more than one peer):

    0.2

  Path #1: Received by speaker 0

  Advertised to CE update-groups (with more than one peer):

    0.2

  65008

    192.200.1.2 (metric 2) from 6.6.6.6 (6.6.6.6)

      Origin incomplete, localpref 100, valid, internal, best, group-best,

import-candidate, imported- This tag gets added for the imported route

      Received Path ID 0, Local Path ID 1, version 258011

      Source VRF: default, Source Route Distinguisher: 0:0

RP/0/RSP0/CPU0:vc#

RP/0/RSP0/CPU0:vc#sh cef vrf vrf1 8.0.0.0/24

Wed Jan 16 10:50:08.130 PST

8.0.0.0/24, version 110154, internal 0x14000001 (ptr 0x75714894) [1], 0x0 (0x0), 0x0 (0x0)

Updated Jan 16 10:38:15.502

Prefix Len 24, traffic index 0, precedence n/a, priority 3

   via 192.200.1.2, 7 dependencies, recursive [flags 0x6010]

    path-idx 0 [0x72d9f6e0 0x0]

    next hop VRF - 'default', table - 0xe0000000---- next hop would still point to the default vrf for a route imported in vrf table

    next hop 192.200.1.2 via 192.200.1.0/24

RP/0/RSP0/CPU0:vc#

 

          ii) Matching Community attribute             

 

Configuration on Cisco router

route-policy dyna-route-leak-comm-9-x

  if community matches-every (65008:9) then

    pass

  endif

end-policy

vrf vrf2

address-family ipv4 unicast

  import from default-vrf route-policy dyna-route-leak-comm-9-x

  import route-target

   1:2

 

Global Entry for route:

 

RP/0/RSP0/CPU0:vc#sh bgp 9.0.0.0/24

Fri Jan  4 16:27:10.080 PST

BGP routing table entry for 9.0.0.0/24

…..

………

………

Not advertised to any peer

  65008

    1.1.1.1 (metric 9) from 1.1.1.1 (1.1.1.1)

      Origin IGP, localpref 100, valid, internal, best, group-best, import-candidate

      Received Path ID 0, Local Path ID 1, version 739583

      Community: 65008:9

 

Show command to see imported route in vrf2

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf2 9.0.0.0  

Wed Jan 16 11:07:39.941 PST

BGP routing table entry for 9.0.0.0/24, Route Distinguisher: 1:2

.....

....

192.200.1.2 (metric 2) from 6.6.6.6 (6.6.6.6)

      Origin incomplete, localpref 100, valid, internal, best, group-best,

import-candidate, imported

......

 

 

          iii) Matching as-path; prefix

 

Configuration on Cisco router

route-policy dyna-route-leak-aspath-prefix-10-x

  if as-path originates-from '65008'  and destination in (10.0.0.0/24) then

    pass

  endif

end-policy

!

vrf vrf3

address-family ipv4 unicast

  import from default-vrf route-policy dyna-route-leak-aspath-prefix-10-x

  import route-target

   1:3

 

Global entry for the route:

 

RP/0/RSP0/CPU0:vc#sh bgp 10.0.0.0/24

Wed Jan 16 11:13:46.446 PST

BGP routing table entry for 10.0.0.0/24

……

…….

 

Show command to see imported route in vrf3

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf3 10.0.0.0/24

Wed Jan 16 11:14:10.537 PST

BGP routing table entry for 10.0.0.0/24, Route Distinguisher: 1:3

…..

…..

Origin incomplete, localpref 100, valid, internal, best, group-best,

import-candidate, imported

…….

 

RP/0/RSP0/CPU0:vc#sh cef vrf vrf3 10.0.0.0

Wed Jan 16 11:14:21.743 PST

10.0.0.0/24, version 58508, internal 0x14000001 (ptr 0x75b37d34) [1], 0x0 (0x0), 0x0 (0x0)

…….

   next hop VRF - 'default', table - 0xe0000000

   next hop 192.200.1.2 via 192.200.1.0/24

RP/0/RSP0/CPU0:vc#

 

 

          iv) Matching as-path;prefix and community

 

Configuration on Cisco router

route-policy dyna-route-leak-aspath-prefix-comm-11-x

  if as-path originates-from '65008'  and destination in (11.0.0.0/24) and community matches-every (65008:11) then

    pass

  endif

end-policy

 

vrf vrf4

address-family ipv4 unicast

  import from default-vrf route-policy dyna-route-leak-aspath-prefix-comm-11-x

  import route-target

   1:4

 

Global entry for the route:

 

RP/0/RSP0/CPU0:vc#sh bgp 11.0.0.0/24

Wed Jan 16 11:20:59.420 PST

BGP routing table entry for 11.0.0.0/24

…..

…..

 

Show command to see imported route in vrf4

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf4 11.0.0.0                                  

Wed Jan 16 11:22:48.438 PST

BGP routing table entry for 11.0.0.0/24, Route Distinguisher: 1:4

……

……

Origin incomplete, localpref 100, valid, internal, best, group-best,

import-candidate, imported

……..

 

RP/0/RSP0/CPU0:vc#sh cef vrf vrf4 11.0.0.0

Wed Jan 16 11:23:27.457 PST

11.0.0.0/24, version 39030, internal 0x14000001 (ptr 0x75b37da4) [1], 0x0 (0x0), 0x0 (0x0)

Updated Jan 16 11:22:50.079

.......

   next hop VRF - 'default', table - 0xe0000000

   next hop 192.200.1.2 via 192.200.1.0/24

RP/0/RSP0/CPU0:vc#

 

 

 

 

2) Export to default-vrf

 

          i) Matching prefix

Cisco configuration on the router

route-policy dyna-route-leak-26-x

  if destination in (26.0.0.0/30) then

    pass

  endif

end-policy

vrf vrf1

address-family ipv4 unicast

export to default-vrf route-policy dyna-route-leak-26-x

  export route-target

   1:1

 

VRF entry for the route:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf1 26.0.0.0                

Wed Jan 16 11:34:20.369 PST

BGP routing table entry for 26.0.0.0/30, Route Distinguisher: 3.3.3.3:0

…….

……

 

Show command to see exported route in the global table

 

RP/0/RSP0/CPU0:vc#sh bgp 26.0.0.0                        

Wed Jan 16 11:34:46.949 PST

BGP routing table entry for 26.0.0.0/30

……..

…….

Advertised to update-groups (with more than one peer):

   0.7 0.8

65002

   192.172.1.2 from 192.172.1.2 (192.172.1.2)

     Origin incomplete, localpref 100, valid, external, best, group-best, import-candidate, imported -••à This tag gets added for the imported route

     Received Path ID 0, Local Path ID 1, version 372157

     Extended community: RT:1:1

     Origin-AS validity: not-found

     Source VRF: vrf1, Source Route Distinguisher: 3.3.3.3:0

 

RP/0/RSP0/CPU0:vc#sh cef 26.0.0.0

Wed Jan 16 11:34:54.832 PST

26.0.0.0/30, version 2038985, internal 0x14004001 (ptr 0x759afa7c) [1], 0x0 (0x72fee3d8), 0x400 (0x74714080)

………

next hop VRF - 'vrf1', table - 0xe0000042••à next hop would still point to the vrf table for a route imported in global table

……….

 

          ii) Matching community attribute

Cisco Configuration on the router

route-policy dyna-route-leak-comm-27-x

  if community matches-every (65004:27) then

    pass

  endif

end-policy

!

vrf vrf2

address-family ipv4 unicast

export to default-vrf route-policy dyna-route-leak-comm-27-x

  export route-target

   1:2

  !

 

VRF Entry for route:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf2 27.0.0.0                    

Wed Jan 16 11:42:48.873 PST

BGP routing table entry for 27.0.0.0/30, Route Distinguisher: 1:2

……

……

 

Show command to see exported route in the global table

RP/0/RSP0/CPU0:vc#sh bgp 27.0.0.0

Wed Jan 16 11:44:26.564 PST

BGP routing table entry for 27.0.0.0/30

……

……..

   192.172.2.2 from 192.172.2.2 (192.172.2.2)

     Origin EGP, localpref 100, valid, external, best, group-best, import-candidate, imported

………

 

 

 

RP/0/RSP0/CPU0:vc#sh cef 27.0.0.0

Wed Jan 16 11:44:33.638 PST

27.0.0.0/30, version 2038990, internal 0x14004001 (ptr 0x759afbc0) [1], 0x0 (0x72fee360), 0x400 (0x74b8c278)

………

   next hop VRF - 'vrf2', table - 0xe0000043

   …….

 

 

          iii) Matching as-path; prefix

Cisco configuration on the router

route-policy dyna-route-leak-aspath-prefix-28-x

  if as-path originates-from '65006'  and destination in (28.0.0.0/30) then

    pass

  endif

end-policy

 

vrf vrf3

address-family ipv4 unicast

export to default-vrf route-policy dyna-route-leak-aspath-prefix-28-x

  export route-target

   1:3

 

Vrf entry for the route:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf3 28.0.0.0

Wed Jan 16 11:47:04.085 PST

BGP routing table entry for 28.0.0.0/30, Route Distinguisher: 1:3

………

……

 

Show command to see exported route in the global table

 

RP/0/RSP0/CPU0:vc#sh bgp 28.0.0.0

Wed Jan 16 11:48:31.484 PST

BGP routing table entry for 28.0.0.0/30

……..

……..

Origin incomplete, localpref 100, valid, external, best, group-best, import-candidate, imported

……

 

RP/0/RSP0/CPU0:vc#sh cef 28.0.0.0

Wed Jan 16 11:47:53.249 PST

28.0.0.0/30, version 2059119, internal 0x14000001 (ptr 0x759af9a4) [1], 0x0 (0x72fee400), 0x400 (0x754ea778)

……..

………

   next hop VRF - 'vrf3', table - 0xe0000044

   ……

 

 

          iv) Matching as-path; prefix;community

Cisco configuration on the router

route-policy dyna-route-leak-aspath-prefix-comm-29-x

  if as-path originates-from '65008'  and destination in (29.0.0.0/30) and

community matches-every (65008:29) then

    pass

  endif

end-policy

 

vrf vrf4

address-family ipv4 unicast

export to default-vrf route-policy dyna-route-leak-aspath-prefix-comm-29-x

  export route-target

   1:4

 

Vrf entry for the route:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf4 29.0.0.0

Wed Jan 16 11:54:34.259 PST

BGP routing table entry for 29.0.0.0/30, Route Distinguisher: 1:4

……

……….

 

Show command to see exported route in the global table

 

 

RP/0/RSP0/CPU0:vc#sh bgp 29.0.0.0

Wed Jan 16 11:54:51.833 PST

BGP routing table entry for 29.0.0.0/30

……..

……..

 

     Origin incomplete, localpref 100, valid, external, best, group-best,

import-candidate, imported

……

 

RP/0/RSP0/CPU0:vc#sh cef 29.0.0.0

Wed Jan 16 11:54:56.327 PST

29.0.0.0/30, version 2059125, internal 0x14004001 (ptr 0x72d4c304) [1], 0x0 (0x75554448), 0x400 (0x754fa470)

……..

next hop VRF - 'vrf4', table - 0xe0000045

…….

 

 

3) Common prefixes imported to multiple vrf's

 

Cisco Configuration on the router

route-policy dyna-route-leak-8-x

if destination in (12.0.0.0/24) then

    pass

  endif

end-policy

 

vrf vrf1

address-family ipv4 unicast

import from default-vrf route-policy dyna-route-leak-8-x

 

 

Similarly this route-policy can be imported under multiple vrf to import this prefix.

 

Global entry for the route

 

RP/0/RSP0/CPU0:vc#sh bgp 12.0.0.0/24

Wed Jan 16 12:05:11.712 PST

BGP routing table entry for 12.0.0.0/24

…….

……….

 

Show command to see route imported in multiple vrf’s

 

 

VRF1:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf1 12.0.0.0/24

Wed Jan 16 12:05:30.630 PST

BGP routing table entry for 12.0.0.0/24, Route Distinguisher: 3.3.3.3:0

 

VRF2:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf2 12.0.0.0/24

Wed Jan 16 12:07:08.524 PST

BGP routing table entry for 12.0.0.0/24, Route Distinguisher: 1:2

 

VRF3:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf3 12.0.0.0/24

Wed Jan 16 12:07:12.441 PST

BGP routing table entry for 12.0.0.0/24, Route Distinguisher: 1:3

 

VRF4:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf4 12.0.0.0/24

Wed Jan 16 12:07:17.185 PST

BGP routing table entry for 12.0.0.0/24, Route Distinguisher: 1:4

 

 

Vrf entry in all the vrf’s:

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf1 12.0.0.0/24

Wed Jan 16 12:05:30.630 PST

BGP routing table entry for 12.0.0.0/24, Route Distinguisher: 3.3.3.3:0

…….

……….

     Origin incomplete, localpref 100, valid, internal, best, group-best, import-candidate, imported

     ……….

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf2 12.0.0.0/24

Wed Jan 16 12:07:08.524 PST

BGP routing table entry for 12.0.0.0/24, Route Distinguisher: 1:2

……

………

Origin incomplete, localpref 100, valid, internal, best, group-best, import-candidate, imported

……

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf3 12.0.0.0/24

Wed Jan 16 12:07:12.441 PST

BGP routing table entry for 12.0.0.0/24, Route Distinguisher: 1:3

……..

……..

     Origin incomplete, localpref 100, valid, internal, best, group-best, import-candidate, imported

……

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf4 12.0.0.0/24

Wed Jan 16 12:07:17.185 PST

BGP routing table entry for 12.0.0.0/24, Route Distinguisher: 1:4

…….

……

     Origin incomplete, localpref 100, valid, internal, best, group-best, import-candidate, imported

….......

 

Traffic Scenarios

4 a) CISCO vrf ----> Junos global

Traffic direction: Cisco ----> Junos

27.0.0.0(vrf2) ----> 9.0.0.0

 

Dynamic route-leaking based on Community on Cisco ASR9K:

-Import from default-vrf

 

Cisco configuration on the router

route-policy dyna-route-leak-comm-9-x

  if community matches-every (65008:9) then

    pass

  endif

end-policy

 

vrf vrf2

address-family ipv4 unicast

  import from default-vrf route-policy dyna-route-leak-comm-9-x

 

Global entry for 9.0.0.0 on Cisco ASR9K:

 

RP/0/RSP0/CPU0:vc#sh bgp 9.0.0.0

Wed Feb 13 00:33:04.007 PST

BGP routing table entry for 9.0.0.0/24

……

…….

 

Route as seen in CISCO vrf table after route-leaking

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf2 9.0.0.0

Wed Feb 13 00:33:56.913 PST

BGP routing table entry for 9.0.0.0/24, Route Distinguisher: 1:2

…….

……….

Origin incomplete, localpref 100, valid, internal, best, group-best, import-

candidate, imported

……..

 

Cef entry for the route:

 

RP/0/RSP0/CPU0:vc#sh cef vrf vrf2 9.0.0.0

Wed Feb 13 00:37:02.628 PST

9.0.0.0/24, version 150018, internal 0x14000001 (ptr 0x74e1ef84) [1], 0x0 (0x0), 0x0 (0x0)

……

……

   next hop VRF - 'default', table - 0xe0000000

……..

 

 

   b) Junos Global ----> Cisco vrf

Traffic direction : Junos --> Cisco

9.0.0.0 --> 27.0.0.0(vrf2)

 

Dynamic route-leaking based on Community on Cisco ASR9K:

-Export to default vrf:

Cisco configuration on the router

route-policy dyna-route-leak-comm-27-x

  if community matches-every (65004:27) then

    pass

  endif

end-policy

!

vrf vrf2

address-family ipv4 unicast

export to default-vrf route-policy dyna-route-leak-comm-27-x

 

Vrf entry for the route:

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf2 27.0.0.0                    

Wed Feb 13 00:20:02.109 PST

BGP routing table entry for 27.0.0.0/30, Route Distinguisher: 1:2

……

……

 

Route as seen in CISCO Global table after route-leaking

 

RP/0/RSP0/CPU0:vc#sh bgp 27.0.0.0

Wed Feb 13 00:23:13.598 PST

BGP routing table entry for 27.0.0.0/30

……

……

     Origin EGP, localpref 100, valid, external, best, group-best, import-candidate, imported

…….

 

CEF entry for the route:

RP/0/RSP0/CPU0:vc#sh cef 27.0.0.0

Wed Feb 13 00:22:19.199 PST

27.0.0.0/30, version 357462, internal 0x14000001 (ptr 0x71cedfe0) [1], 0x0 (0x73a9a798), 0x400 (0x74690070)

……

……

   next hop VRF - 'vrf2', table - 0xe0000012

……..

 

5 a) Cisco global ----> Junos vrf

Traffic direction: cisco ----->  junos

16.0.0.0---- 15.0.0.0(vrf1)

 

Route-leaking on Juniper ----- vrf to global:

 

Juniper configuration on the node

root@MX960# show routing-instances vrf1

instance-type vrf;

interface xe-5/1/0.101;

route-distinguisher 1:1;

vrf-import vrf1-import;

vrf-export vrf1-export{

routing-options {

    auto-export;

}

protocols {

    bgp {

        family inet {

            unicast;

        }

        group ROUTE-LEAK {

            type external;

            family inet {

                unicast {

                    rib-group vrf1-to-global;

                }

            }

            neighbor 192.7.1.2 {

                peer-as 65002;

            }

        }                              

    }

}

 

 

Route as seen in Juniper Global table after route-leaking

 

root@MX960# run show route 15.0.0.0

inet.0: 70048 destinations, 70054 routes (70048 active, 0 holddown, 0 hidden)

@ = Routing Use Only, # = Forwarding Use Only

+ = Active Route, - = Last Active, * = Both

15.0.0.0/24       *[BGP/170] 00:14:03, localpref 100

                    AS path: 65002 ?

                   > to 192.7.1.2 via xe-5/1/0.101

vrf1.inet.0: 20038 destinations, 20038 routes (20038 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both

15.0.0.0/24       *[BGP/170] 18:34:44, localpref 100

                     AS path: 65002 ?

                   > to 192.7.1.2 via xe-5/1/0.101

 

 

 

   b) Junos vrf ----> Cisco global

Traffic direction: Junos ----->CISCO

15.0.0.0(vrf1)---- 16.0.0.0

 

Route-leaking on Juniper global--- to----vrf:

 

Juniper configuration on the node

root@MX960# show protocols bgp group ROUTE-LEAK-internal

type internal;

family inet {

    unicast {

        rib-group global-to-vrf1;

    }

}

local-as 65000;

neighbor 3.3.3.3 {

    local-address 6.6.6.6

    peer-as 65000;

}

 

 

Route as seen in Juniper vrf table after route-leaking

 

 

root@MX960# run show route 16.0.0.0

inet.0: 70048 destinations, 70054 routes (70048 active, 0 holddown, 0 hidden)

@ = Routing Use Only, # = Forwarding Use Only

+ = Active Route, - = Last Active, * = Both

16.0.0.0/24       *[BGP/170] 00:58:02, localpref 100, from 3.3.3.3

                     AS path: 65010 ?

                   > to 12.1.1.2 via xe-5/2/0.0

vrf1.inet.0: 20038 destinations, 20038 routes (20038 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both

16.0.0.0/24       *[BGP/170] 00:05:43, localpref 100, from 3.3.3.3

                     AS path: 65010 ?

                   > to 12.1.1.2 via xe-5/2/0.0

 

6 a) CISCO vrf -----> Junos vrf

Traffic direction:

CISCO (26.0.0.0) VRF1------- JUNOS (15.0.0.0) VRF1

 

Dynamic route-leaking configuration on CISCO ASR9K

route-policy dyna-route-leak-15-x

  if destination in (15.0.0.0/24) then

    pass

  endif

end-policy

 

vrf vrf1

address-family ipv4 unicast

  import from default-vrf route-policy dyna-route-leak-15

 

 

Route as seen in CISCO vrf table after route-leaking

 

RP/0/RSP0/CPU0:vc#sh bgp vrf vrf1 15.0.0.0

Thu Feb 7 10:44:05.506 PST

BGP routing table entry for 15.0.0.0/24, Route Distinguisher: 1:1

…….

…….

Not advertised to any peer

65002

   6.6.6.6 (metric 1) from 6.6.6.6 (6.6.6.6)

     Origin incomplete, localpref 100, valid, internal, best, group-best, import-candidate, imported

     Received Path ID 0, Local Path ID 1, version 128819

     Extended community: RT:1:1

     Source VRF: default, Source Route Distinguisher: 0:0

 

 

   b) Junos vrf ----> Cisco vrf

Traffic direction:

JUNOS (15.0.0.0) VRF1------- CISCO (26.0.0.0) VRF1

 

 

Header 1

route-policy dyna-route-leak-26-x

  if destination in (26.0.0.0/30) then

    pass

endif

end-policy

!

 

vrf vrf1

address-family ipv4 unicast

export to default-vrf route-policy dyna-route-leak-26-x

 

Route as seen in Juniper vrf table after route-leaking

 

root@MX960# run show route 26.0.0.0  

inet.0: 60028 destinations, 60034 routes (60028 active, 0 holddown, 0 hidden)

@ = Routing Use Only, # = Forwarding Use Only

+ = Active Route, - = Last Active, * = Both

26.0.0.0/30       *[BGP/170] 00:00:03, localpref 100, from 3.3.3.3

                     AS path: 65002 ?

                   > to 12.1.1.2 via xe-5/2/0.0

vrf1.inet.0: 10018 destinations, 10018 routes (10018 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both

26.0.0.0/30       *[BGP/170] 00:00:03, localpref 100, from 3.3.3.3

                     AS path: 65002 ?

                   > to 12.1.1.2 via xe-5/2/0.0

 

 

References

N/A

 

 

Sheetal Bhogale

Software Engineer, ASR9K SIT Team

Comments

Hello Xander,

Hope you are doing good. this question might be a bit off topic, but is there an easy way to leak routes between two different VRFs other then using export/import RT combination.

Another question is can we configure static route in a VRF with a global next-hop as possible on the IOS.

Thanks,

Mufaddal

Cisco Employee

hi mufaddal,

one could configure static routes manually, but that doesn't sound like an appealing option...

and sure thing you can configure a static route with a next hop in a different table like this:

 vrf RED
  address-family ipv4 unicast
   0.0.0.0/0 10.1.1.1
   1.2.3.4/32 vrf BLUE 4.4.4.4
   1.2.3.4/32 vrf BLUE Bundle-Ether100.800 4.4.4.4
  !

xander

I guess we don't have something like what we do for the default-vrf, 

export to vrf-a

import from vrf-b

For the static route option, how do we put the next-hop which is in the default-vrf or we can directly put the loopback in GRT

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