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
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