[j-nsp] eBGP neighbor link failure detection

[Andy Litzinger]

One of my providers (and eBGP neighbor) recently had a hardware failure
which caused the port that connects our two routers to go down.  My router
did detect the link failure and BGP pretty much immediately transitioned to
an Idle state.  my side is a Juniper MX80  running 11.4, their side I
believe is a Cisco 6509.

what surprised me is that it looks like routes toward that provider were
not immediately removed from my routing table.  Instead i see evidence of
blackholing for almost 3 minutes.  Is this normal behavior?  is the
behavior configurable? I thought it might be related to the BGP holdtime,
but that appears to be set for 30 seconds.

  I see that cisco has a feature called 'fast-external-fallover' that
bypasses the hold-down timer.  Is there an equivalent in JunOS?  what is
the Juniper best practice to handle link failure between eBGP neighbors?

thanks!
 -andy