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BGP Backdoor

Hello,

Working on the simulation to show how BGP network x.x.x.x backdoor is working. So in the below example i have router which is configured with backdoor, when IGP (OSPF) is running i see this route in routing table, but from curiosity i shut that link to see if my route (172.16.3.0) will show up in bgp table. It is not showing up? My understanding of the backdoor is that it will be advertised to eBGP peers once IGP link go down, also this is local subnet to this router so i imagined that would be advertised right away?  

 

 

R7#sh run | s bgp
router bgp 3
 bgp router-id 192.168.3.254
 bgp log-neighbor-changes
 network 172.16.1.0 mask 255.255.255.0
 network 172.16.3.0 mask 255.255.255.0 backdoor
 network 172.17.0.0
 network 192.168.6.128 mask 255.255.255.128
 neighbor 10.255.255.3 remote-as 1
 neighbor 10.255.255.3 ebgp-multihop 2
 neighbor 10.255.255.3 update-source Loopback0
 neighbor 10.255.255.3 filter-list 1 out
 neighbor 192.168.100.38 remote-as 4
 neighbor 192.168.100.38 filter-list 1 out
 neighbor 192.168.100.42 remote-as 5
 neighbor 192.168.100.42 filter-list 1 out
R7#sh ip bgp nei 10.255.255.3 adver
R7#sh ip bgp nei 10.255.255.3 advertised-routes
BGP table version is 13, local router ID is 192.168.3.254
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  172.16.1.0/24    0.0.0.0                  0         32768 i
 *>  172.17.0.0       0.0.0.0                  0         32768 i
 *>  192.168.6.128/25 0.0.0.0                  0         32768 i

Total number of prefixes 3
R7#

 

R7#sh ip int br | e una
Interface                  IP-Address      OK? Method Status                Protocol
Ethernet0/0                192.168.100.37  YES manual up                    up  
Serial2/0                  192.168.100.26  YES manual up                    up  
Serial2/1                  192.168.100.41  YES manual up                    up  
Loopback0                  10.255.255.7    YES manual up                    up  
Loopback1                  172.16.1.1      YES manual up                    up  
Loopback3                  172.16.3.1      YES manual up                    up  
Loopback10                 192.168.6.129   YES manual up                    up  
Loopback11                 172.17.0.1      YES manual up                    up 

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