On 2018-05-21 01:22, Solene Rapenne wrote:

hello

I'm not sure to understand your need. You don't need BGP for
this. Adding a route on router A, accessing network B through router B
is all you need. Computers on the dhcp client of A will use router A as
a default gateway and then will be able to reach network B computers.

And then, do the same on the other router.

Or maybe I totally missed your need.

I probably didn't explain it very well. Here is my best attempt of drawing the situation in ASCII:

  OooooooooooooooooO
 o     INTERNET     o
  OooooooooooooooooO
   |              |
   | ?.?.?.?      | ?.?.?.?
 +---+          +---+
 | A |          | B |
 +---+          +---+
   | 10.0.0.1     | 10.0.0.2
   |              |
   +--------------+

What I need is some way for A and B to inform each other of their Internet facing IP addresses. They would then route those IPs via the internal path. Since the Internet-facing addresses are dynamic, the routers should inform each other when these change.

Network A and B should be completely autonomous. But they should be aware of their local line instead of using the Internet.

The situation I have now, using BGP, does almost exactly what I want. The only problem is that the routers inform each other of their whole Internet subnet, instead of just their own host entries.

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