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AOS-CX Simple Route redistribution OSPF-BGP!

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  • 1.  AOS-CX Simple Route redistribution OSPF-BGP!

    Posted Jul 22, 2020 01:03 PM

    Good day!

     

    AOS-CX Route Redistribution

    Route redistribution is a process that allows a network to use a routing protocol to dynamically route traffic based on information learned from a different routing protocol like OSPF and BGP. Route redistribution helps increase accessibility and control routes within networks.

     

    AOS-CX 10.5 Sample Topology

    Yash_0-1595436678389.png

     

    Step1: Let's configure BGP-CORE

     

    hostname BGPCORE

     

    !#Configure LAG11 to ASBR-1

    interface lag 11

        no shutdown

        ip address 172.16.0.1/30

        lacp mode active

    interface 1/1/1

        no shutdown

        lag 11

    interface 1/1/2

        no shutdown

        lag 11

    !#Configure LAG12 to ASBR-2

    interface lag 12

        no shutdown                                 

        ip address 172.16.0.5/30

        lacp mode active

    interface 1/1/3

        no shutdown

        lag 12

    interface 1/1/4

        no shutdown

        lag 12

     

    !#Configure Loopback

    interface loopback 0

        ip address 172.31.0.1/32

     

    !#Configure BGP AS 65010

    router bgp 65010

        neighbor 172.16.0.2 remote-as 65011

        neighbor 172.16.0.6 remote-as 65011

        address-family ipv4 unicast

            neighbor 172.16.0.2 activate

            neighbor 172.16.0.6 activate

            network 172.16.0.0/30

            network 172.16.0.4/30

            network 172.31.0.1/32

        exit-address-family

    !

     

    Step2: Configure ASBR-1

     

    hostname ASBR-1

     

    !#Configure OSPF and BGP

    interface loopback 0

        ip address 1.1.1.1/32

        ip ospf 1 area 0.0.0.0

    router ospf 1

        router-id 1.1.1.1                                         

        bfd all-interfaces

        redistribute bgp

        area 0.0.0.0

    router bgp 65011

        neighbor 172.16.0.1 remote-as 65010

        address-family ipv4 unicast

            neighbor 172.16.0.1 activate

            neighbor 172.16.0.1 next-hop-self

            redistribute ospf

        exit-address-family

     

    !#Configure Lag1 between ASBR’s

    interface lag 1

        no shutdown

        ip address 10.0.1.1/30

        lacp mode active

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point

    interface 1/1/3

        no shutdown

        lag 1

    interface 1/1/4

        no shutdown

        lag 1

    !#Configure Lag11 to BGP-CORE

    interface lag 11                                              

        no shutdown

        ip address 172.16.0.2/30

        lacp mode active

    interface 1/1/1

        no shutdown

        lag 11

    interface 1/1/2

        no shutdown

        lag 11

    !#Configure OSPF-1 and OSPF-2 connected interface

    interface 1/1/5                                               

        no shutdown

        ip address 10.0.1.5/30

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point

    interface 1/1/6

        no shutdown

        ip address 10.0.1.9/30

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point

     

    Step3: Configure ASBR-2

     

    hostname ASBR-2

     interface loopback 0

        ip address 1.1.1.2/32

        ip ospf 1 area 0.0.0.0

    router ospf 1

        router-id 1.1.1.2

        bfd all-interfaces

        redistribute bgp

        area 0.0.0.0                                              

    router bgp 65011

        neighbor 172.16.0.5 remote-as 65010

        address-family ipv4 unicast

            neighbor 172.16.0.5 activate

            neighbor 172.16.0.5 next-hop-self

            redistribute ospf

        exit-address-family

    !#Configure Lag1 between ASBR’s

    interface lag 1

        no shutdown

        ip address 10.0.1.2/30

        lacp mode active

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point 

    interface 1/1/3

        no shutdown

        lag 1

     

    interface 1/1/4

        no shutdown

        lag 1

    !#Configure Lag12 to BGP-CORE

    interface lag 12

        no shutdown

        ip address 172.16.0.6/30

        lacp mode active

    interface 1/1/1

        no shutdown

        lag 12

    interface 1/1/2

        no shutdown

        lag 12

     !#Configure OSPF-1 and OSPF-2 connected interface

    interface 1/1/5

        no shutdown

        ip address 10.0.1.13/30

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point

    interface 1/1/6

        no shutdown

        ip address 10.0.1.17/30

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point

     

    Step4: Configure OSPF-1

     

    hostname OSPF-1

    !#Configure Loopback and OSPF

    interface loopback 0

        ip address 1.1.2.1/32

        ip ospf 1 area 0.0.0.0

    router ospf 1

        router-id 1.1.2.1

        area 0.0.0.0

    !#Configure OSPF on connected interface

    interface 1/1/1

        no shutdown

        ip address 10.0.1.6/30

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point                             

    interface 1/1/2

        no shutdown

        ip address 10.0.1.14/30

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point

     

    Step5: Configure OSPF-2

     

    hostname OSPF-2

    !#Configure loopback and OSPF

    interface loopback 0

        ip address 1.1.2.2/32

        ip ospf 1 area 0.0.0.0

    router ospf 1

        router-id 1.1.2.2

        bfd all-interfaces

        area 0.0.0.0

    !#Configure OSPF on connected interface

    interface 1/1/1

        no shutdown

        ip address 10.0.1.10/30

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point                            

    interface 1/1/2

        no shutdown

        ip address 10.0.1.18/30

        ip ospf 1 area 0.0.0.0

        ip ospf network point-to-point

     

    VERIFICATION:

     

    ASBR-1# show lldp neighbor-info

     LLDP Neighbor Information

    =========================

    Total Neighbor Entries          : 5

    Total Neighbor Entries Deleted  : 0

    Total Neighbor Entries Dropped  : 0

    Total Neighbor Entries Aged-Out : 0

     

    LOCAL-PORT  CHASSIS-ID         PORT-ID          PORT-DESC               TTL      SYS-NAME   

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

    1/1/1       08:00:09:21:4c:e9  1/1/1            1/1/1                   120      BGPCORE                           

    1/1/2       08:00:09:21:4c:e9  1/1/2            1/1/2                   120      BGPCORE                           

    1/1/3       08:00:09:a8:58:d4  1/1/3            1/1/3                   120      ASBR-2                            

    1/1/4       08:00:09:a8:58:d4  1/1/4            1/1/4                   120      ASBR-2                            

    1/1/5       08:00:09:04:b6:52  1/1/1            1/1/1                   120      OSPF-1                            

    ASBR-1#

     

    ASBR-1# sh ip ospf 1 routes

    Codes: i - Intra-area route, I - Inter-area route

           E1 - External type-1, E2 - External type-2

     

    OSPF Process ID 1 VRF default, Routing Table

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

     

    Total Number of Routes : 10

     

    1.1.1.2/32         (i) area: 0.0.0.0

         via 10.0.1.2 interface lag1, cost 50 distance 110

    1.1.2.1/32         (i) area: 0.0.0.0

         via 10.0.1.6 interface 1/1/5, cost 100 distance 110

    10.0.1.0/30        (i) area: 0.0.0.0

         directly attached to interface lag1, cost 50 distance 110

    10.0.1.4/30        (i) area: 0.0.0.0

         directly attached to interface 1/1/5, cost 100 distance 110

    10.0.1.8/30        (i) area: 0.0.0.0

         directly attached to interface 1/1/6, cost 100 distance 110

    10.0.1.12/30       (i) area: 0.0.0.0

         via 10.0.1.2 interface lag1, cost 150 distance 110

    10.0.1.16/30       (i) area: 0.0.0.0

         via 10.0.1.2 interface lag1, cost 150 distance 110

    172.16.0.0/30      (E2)

         via 10.0.1.2 interface lag1, cost 25 distance 110        

    172.16.0.4/30      (E2)

         via 10.0.1.2 interface lag1, cost 25 distance 110

    172.31.0.1/32      (E2)

         via 10.0.1.2 interface lag1, cost 25 distance 110

     

    ASBR-1#

     

    Reference:

    https://techhub.hpe.com/eginfolib/Aruba/OS-CX_10.04/5200-6702/index.html#book.html

     

     

    Thank you,

    Yash