unavailable virtual gateways

[Robert Woody Woodburn <[e-mail]>]

      Unavailable virtual gateways should not have an effect on the routing
      information database.  Rather, as I said in my previous message, a
      route server can use information about unavailable virtual gateways to
      flush routes that traverse such gateways from its route database (i.e.
      route cache).  To use this information, the route server would have to
      keep track of the routes in which each virtual gateway is included,
      and I know that the prototype software doesn't do this.  But I think
      this cache clean up is a function that a route server may well want to
      have.

OK, I can see that.  I change my vote to leaving it in.  It is easy to
compute, and it does make cleaning the route cache easy.

wood y