Re: EBGP over unnumbered serial lines

[Tony Li <[e-mail]>]

   > Here is Yakov's response to my question on whether it makes sense to
   > support external BGP over unnumbered serial lines.  Yakov suggested
   > that we bring this issue up in the mailing list.  All comments are 
   > welcome.
   > 
   > > I think that the "same subnet" restriction is mostly intended to
   > > make sure that the external neighbors are one hop away from each 
   > > other (on a common Data Link subnetwork). I think the key question
   > > you need to answer is what you are going to put in the NEXT_HOP attribute,
   > > and whether what you'll put in the NEXT_HOP attribute would cause
   > > any problems to the neighbor (when the neighbor receive a route with
   > > this attribute).  I suspect (but I am not sure), that there
   > > may be some problems associated with what you put in the NEXT_HOP
   > > when you have serial line with unnumbered interfaces.

   And how would a TCP connection be handled between the unnumbered endpoints
   of a serial line?

Wow, you can do that?  ;-)

The correct answer (that Dimitry alludes to obliquely) is that if you
put your TCP peering address into the NEXT_HOP attribute that the
neighbor should accept it.  Assuming the neighbor has a clue.

Tony