[nsp] RIB failure when using backdoor network

[Scott.Keoseyan@BroadWing.com]

I ran into a weird situation and I am hoping someone can shed some light
here...

I am receiving a default route via eBGP (don't ask).  I also have generated
a default-route from another router via my IGP, which I prefer.

I used the 

"network 0.0.0.0 mask 0.0.0.0 backdoor"

command, to ensure I used the default I prefer.

When I did this, I ended up with a RIB Failure in the BGP table.  Is this
normal?

router2#sh ip bgp  
BGP table version is 19286, local router ID is 172.16.0.1
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
              r RIB-failure
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
r> 0.0.0.0          192.168.100.1                  119      0 100 200 i

when I remove the command, the route simply drops back to "valid" state,
which is what I would expect, but I did not expect to see RIB-Failure when I
used the backdoor command since it doesn't appear to be noted anywhere in
the documentation (RIB-Failure as a Status code does not appear to be
documented yet in any of the docs I could find... a search on "RIB-Failure"
produced no meaningful results).

I did find a bug (CSCdw84776) that describes a condition when operating as a
PE that could cause a RIB failure, but that has little to do with my
config... 

This is a 3660 running 12.2(11)T... and I know... it shouldn't be... :-/

thanks,

Scott
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