Problem: bb01.lsrei01 is preferring a supernet static route to null0 over an external /32 LSA: 77.73.147.245


ip route 77.73.144.0 255.255.248.0 Null0 200   (needed for bgp announcement)

router ospf 1
 log-adjacency-changes
 passive-interface default
 no passive-interface GigabitEthernet0/1
 no passive-interface GigabitEthernet0/2
 no passive-interface GigabitEthernet0/3
 network 77.73.144.0 0.0.0.255 area 0
 default-information originate always


bb01.lsrei01#sho ip ospf database external 77.73.147.245

            OSPF Router with ID (77.73.144.65) (Process ID 1)

                Type-5 AS External Link States

  LS age: 259
  Options: (No TOS-capability, DC)
  LS Type: AS External Link
  Link State ID: 77.73.147.245 (External Network Number )
  Advertising Router: 77.73.144.69
  LS Seq Number: 80000004
  Checksum: 0x944C
  Length: 36
  Network Mask: /32
        Metric Type: 2 (Larger than any link state path)
        TOS: 0
        Metric: 20
        Forward Address: 77.73.144.9
        External Route Tag: 0

bb01.lsrei01#sho ip route 77.73.147.245
Routing entry for 77.73.144.0/21
  Known via "static", distance 200, metric 0 (connected)
  Advertised by bgp 42579
  Routing Descriptor Blocks:
  * directly connected, via Null0
      Route metric is 0, traffic share count is 1

bb01.lsrei01#sho ip route 77.73.144.9   <------------ next hop from the LSA
Routing entry for 77.73.144.8/29
  Known via "connected", distance 0, metric 0 (connected, via interface)
  Routing Descriptor Blocks:
  * directly connected, via GigabitEthernet0/2
      Route metric is 0, traffic share count is 1



Yet this one is fine??? -

bb01.lsrei01#sho ip ospf database external 77.73.148.32

            OSPF Router with ID (77.73.144.65) (Process ID 1)

                Type-5 AS External Link States

  LS age: 426
  Options: (No TOS-capability, DC)
  LS Type: AS External Link
  Link State ID: 77.73.148.32 (External Network Number )
  Advertising Router: 77.73.144.71
  LS Seq Number: 800005CE
  Checksum: 0x9B78
  Length: 36
  Network Mask: /32
        Metric Type: 2 (Larger than any link state path)
        TOS: 0
        Metric: 20
        Forward Address: 0.0.0.0
        External Route Tag: 0

  Routing Bit Set on this LSA
  LS age: 231
  Options: (No TOS-capability, DC)
  LS Type: AS External Link
  Link State ID: 77.73.148.32 (External Network Number )
  Advertising Router: 77.73.144.72
  LS Seq Number: 800005CC
  Checksum: 0x997B
  Length: 36
  Network Mask: /32
        Metric Type: 2 (Larger than any link state path)
        TOS: 0
        Metric: 20
        Forward Address: 0.0.0.0
        External Route Tag: 0

bb01.lsrei01#sho ip route 77.73.148.32
Routing entry for 77.73.148.32/32
  Known via "ospf 1", distance 110, metric 20, type extern 2, forward metric 510
  Last update from 77.73.144.11 on GigabitEthernet0/2, 00:05:52 ago
  Routing Descriptor Blocks:
  * 77.73.144.11, from 77.73.144.72, 00:05:52 ago, via GigabitEthernet0/2
      Route metric is 20, traffic share count is 1







77.73.147.245 is being advertised by an asa:

router ospf 1
 router-id 77.73.144.69
 network 77.73.144.0 255.255.255.0 area 0
 area 0
 log-adj-changes
 redistribute static subnets route-map VPN-REDISTRIBUTE
!
route-map VPN-REDISTRIBUTE permit 10
 match ip address Remote-Staff_netblock
!
access-list Remote-Staff_netblock standard permit 77.73.147.224 255.255.255.224
!
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set reverse-route

fw01# sho route  | i 77.73.147.245
S    77.73.147.245 255.255.255.255 [1/0] via 77.73.144.9, outside