[rbak-nsp] Corrent subscriber's configuration but cannot ping gateway

[Tao Lei]

Hello.

I have run into this strange thing more than once, especially when 
configuring or modifying dedicated IP for customers:
  The configuration is correct -- "interface", "subscriber", "bind 
subscriber" ... all are there, no wrong.
  But the customer is still not able to ping the gateway (interface's ip 
address configured on BRAS).
  Finally, I undo the "bind subscriber"statement and then re-bind it, or 
even delete the subscriber and then re-create it.
  Not till then can the customer ping gateway.

I don't know where the problem is and why sometimes I must first un-bind and 
then re-bind the subscriber.
Is there any detail need to be paid attention to?

Thanks.