<｜begin▁of▁sentence｜>
### Instruction:
What is the purpose of the BGP fast external fallover feature?
### Response:
By default, if a directly connected eBGP peer goes down, BGP waits until the hold timer expires to tear down the session. The fast external fallover feature immediately resets the session if the interface to the eBGP peer goes down, without waiting for the hold timer.
<|EOT|>
