[c-nsp] BFD state remains in "AdminDown"

[Stephen Fulton]

I have BFD configured between two routers, both running 12.4(15)T3.  On 
router A, BFD cycles between INIT and DOWN.  On router B, the state 
remains "AdminDown".  Here are the configs for both interfaces:

-- snip --

Router A:

interface FastEthernet0/0.1000
  encapsulation dot1Q 1000
  ip vrf forwarding CUSTOMER
  ip address 10.248.1.1 255.255.255.248
  no ip redirects
  ip ospf hello-interval 2
  ip ospf dead-interval 6
  ip ospf priority 255
  ip ospf bfd
  bfd interval 50 min_rx 50 multiplier 5
  no cdp enable
end


Router B:

interface FastEthernet0/0
  bandwidth 1544
  ip address 10.248.1.2 255.255.255.248
  no ip redirects
  ip ospf hello-interval 2
  ip ospf dead-interval 6
  ip ospf bfd
  duplex full
  speed 10
  bfd interval 50 min_rx 50 multiplier 5
  no cdp enable
end

-- snip --

And here is the output from "sh bfd neighbors detail" for both:

-- snip --

Router A:

Sheridan#sh bfd neighbors 10.248.1.2 details

OurAddr       NeighAddr     LD/RD  RH/RS  Holddown(mult)  State     Int
10.248.1.1    10.248.1.2     7/3    Down      4108 (5 )   Init 
Fa0/0.1000
Local Diag: 1, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 5
Received MinRxInt: 1000000, Received Multiplier: 5
Holddown (hits): 4108(102), Hello (hits): 1000(567)
Rx Count: 619, Rx Interval (ms) min/max/avg: 744/1092/879 last: 892 ms ago
Tx Count: 773, Tx Interval (ms) min/max/avg: 1/1000/704 last: 424 ms ago
Elapsed time watermarks: 0 8 (last: 4)
Registered protocols: OSPF
Last packet: Version: 1            - Diagnostic: 0
              State bit: Down       - Demand bit: 0
              Poll bit: 0           - Final bit: 0
              Multiplier: 5         - Length: 24
              My Discr.: 3          - Your Discr.: 0
              Min tx interval: 1000000    - Min rx interval: 1000000
              Min Echo interval: 50000


Router B:

OurAddr       NeighAddr     LD/RD  RH/RS  Holddown(mult)  State     Int
10.248.1.2    10.248.1.1     3/0    Down      0    (0 )   Down      Fa0/0
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 5
Received MinRxInt: 0, Received Multiplier: 0
Holddown (hits): 0(0), Hello (hits): 1000(515)
Rx Count: 0, Rx Interval (ms) min/max/avg: 0/0/0 last: 1351524 ms ago
Tx Count: 516, Tx Interval (ms) min/max/avg: 756/1000/879 last: 168 ms ago
Elapsed time watermarks: -1 0 (last: 0)
Registered protocols: OSPF
Last packet: Version: 1            - Diagnostic: 0
              State bit: AdminDown  - Demand bit: 0
              Poll bit: 0           - Final bit: 0
              Multiplier: 0         - Length: 0
              My Discr.: 0          - Your Discr.: 0
              Min tx interval: 0    - Min rx interval: 0
              Min Echo interval: 0

-- snip --

I'm out of ideas, and there is nothing in the bug toolkit.. Suggestions?

-- Stephen