Redistributing BGP route into OSPF from Azure ExpressRoute
BGP/OSPF novice here. ICND 1 and 2 only went over the basics.
I'm using Microsoft's Azure ExpressRoute with private peering on an ASR1001X with XE 3.16.02.S
show bgp does show my remote routes in Azure. How do I publish these into my internal OSPF routes so that everyone else knows how to get into the azure private space?
I'm able to see all the other OSPF routes in my network on this ASR so I know I'm a member of OSPF, I just can't figure out how to advertise my azure routes to the rest of my network.
10.0.0.16/32 is the primary network
10.0.0.20/32 is the secondary
172.30.0.0/16 is the remote azure ip space
10.40.0.11 is the ASR
EQX-DA2-ASR#show ip route
Gateway of last resort is 10.40.0.1 to network 0.0.0.0
S* 0.0.0.0/0 [1/0] via 10.40.0.1 10.0.0.0/8 is variably subnetted, 29 subnets, 6 masks O 10.0.0.0/30 [110/3] via 10.40.0.1, 01:48:33, GigabitEthernet0/0/1 . . . C 10.0.0.16/30 is directly connected, GigabitEthernet0/0/3.1 L 10.0.0.17/32 is directly connected, GigabitEthernet0/0/3.1 C 10.0.0.20/30 is directly connected, GigabitEthernet0/0/4.1 L 10.0.0.21/32 is directly connected, GigabitEthernet0/0/4.1 B 172.30.0.0/16 [20/0] via 10.0.0.18, 2d19h
show bgp BGP table version is 3, local router ID is 10.40.0.11
Network Next Hop Metric LocPrf Weight Path *> 10.40.0.0/24 0.0.0.0 0 32768 i * 172.30.0.0 10.0.0.22 0 12076 i *> 10.0.0.18 0 12076 i
show run . . .
! interface GigabitEthernet0/0/1 ip address 10.40.0.11 255.255.255.0 ip ospf 1 area 0 negotiation auto ! interface GigabitEthernet0/0/3 description DA1-CX-PRI-01 no ip address negotiation auto ! interface GigabitEthernet0/0/3.1 description ExpressRoute Primary encapsulation dot1Q 1000 ip address 10.0.0.17 255.255.255.252 ! interface GigabitEthernet0/0/4 description DA1-CX-SEC-01 no ip address negotiation auto ! interface GigabitEthernet0/0/4.1 description ExpressRoute Secondary encapsulation dot1Q 1001 ip address 10.0.0.21 255.255.255.252 ! router ospf 1 router-id 10.40.0.11 network 172.30.0.0 0.0.255.255 area 0 ! router bgp 64512 bgp log-neighbor-changes neighbor 10.0.0.18 remote-as 12076 neighbor 10.0.0.22 remote-as 12076 ! address-family ipv4 network 10.0.0.30 mask 255.255.255.255 network 10.40.0.0 mask 255.255.255.0 neighbor 10.0.0.18 activate neighbor 10.0.0.22 activate exit-address-family !
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