See attached topology of lab.
I am running OSPF on routers 1-4, and 10; BGP on R4-6.
I am using Lo0 for BGP neighborships, not using IGP for BGP connectivity as I have static routes.
I entered redistribute static subnets under OSPF 1 on router 4 so all OSPF routers can now ping all Lo0 of every router including R4-6 BGP routers. Would this be a good practice implementation, or is IGP usually always used on BGP routers which may connect to ISP BGP routers, etc.?
R2:
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
no ip address
shutdown
duplex half
!
interface GigabitEthernet1/0
ip address 10.1.1.2 255.255.255.0
ip ospf message-digest-key 1 md5 cisco
ip ospf 1 area 0
negotiation auto
!
interface GigabitEthernet2/0
ip address 10.1.3.2 255.255.255.0
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 cisco
ip ospf 1 area 1
negotiation auto
!
interface GigabitEthernet3/0
ip address 10.1.4.2 255.255.255.0
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 cisco
ip ospf 1 area 1
negotiation auto
router ospf 1
router-id 2.2.2.2
network 2.2.2.2 0.0.0.0 area 1
================================
R4:
interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface FastEthernet0/0
no ip address
shutdown
duplex half
!
interface GigabitEthernet1/0
bandwidth 128
ip address 10.1.4.4 255.255.255.0
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 cisco
ip ospf 1 area 1
load-interval 30
negotiation auto
!
interface GigabitEthernet2/0
ip address 11.1.3.4 255.255.255.0
negotiation auto
!
interface GigabitEthernet3/0
ip address 11.1.1.4 255.255.255.0
negotiation auto
!
interface GigabitEthernet4/0
no ip address
shutdown
negotiation auto
!
interface FastEthernet5/0
no ip address
shutdown
duplex half
!
interface FastEthernet6/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet6/1
no ip address
shutdown
duplex auto
speed auto
!
router ospf 1
router-id 4.4.4.4
redistribute bgp 4 subnets
redistribute static subnets
!
router bgp 4
bgp log-neighbor-changes
bgp redistribute-internal
network 4.4.4.4 mask 255.255.255.255
network 11.1.1.0 mask 255.255.255.0
network 11.1.3.0 mask 255.255.255.0
redistribute ospf 1
neighbor cisco peer-group
neighbor cisco ebgp-multihop 255
neighbor cisco update-source Loopback0
neighbor cisco version 4
neighbor 5.5.5.5 remote-as 5
neighbor 5.5.5.5 peer-group cisco
neighbor 6.6.6.6 remote-as 6
neighbor 6.6.6.6 peer-group cisco
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip route 5.5.5.5 255.255.255.255 11.1.1.5
ip route 6.6.6.6 255.255.255.255 11.1.3.6
================================
R5:
interface Loopback0
ip address 5.5.5.5 255.255.255.255
!
interface FastEthernet0/0
no ip address
shutdown
duplex half
!
interface GigabitEthernet1/0
ip address 11.1.2.5 255.255.255.0
negotiation auto
!
interface GigabitEthernet2/0
ip address 11.1.1.5 255.255.255.0
negotiation auto
!
interface GigabitEthernet3/0
ip address 12.1.1.5 255.255.255.0
ip ospf 1 area 0
negotiation auto
!
interface GigabitEthernet4/0
no ip address
shutdown
negotiation auto
!
interface FastEthernet5/0
no ip address
shutdown
duplex half
!
interface FastEthernet6/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet6/1
no ip address
shutdown
duplex auto
speed auto
!
router ospf 1
redistribute bgp 5 subnets
!
router bgp 5
bgp log-neighbor-changes
bgp redistribute-internal
network 5.5.5.5 mask 255.255.255.255
network 11.1.1.0 mask 255.255.255.0
network 11.1.2.0 mask 255.255.255.0
network 12.1.1.0 mask 255.255.255.0
neighbor cisco peer-group
neighbor cisco remote-as 5
neighbor cisco ebgp-multihop 255
neighbor cisco update-source Loopback0
neighbor cisco version 4
neighbor 4.4.4.4 remote-as 4
neighbor 4.4.4.4 peer-group cisco
neighbor 6.6.6.6 remote-as 6
neighbor 6.6.6.6 peer-group cisco
neighbor 10.10.10.10 remote-as 5
neighbor 10.10.10.10 next-hop-self
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip route 4.4.4.4 255.255.255.255 11.1.1.4
ip route 6.6.6.6 255.255.255.255 11.1.2.6
