Help with multiple routing tables.

[Grant Taylor]

On 08/22/2018 04:34 PM, Grant Taylor wrote:
> I'll do some more reading on what "learn" does (not) do in the kernel 
> protocol context.

So it looks like learn is a way for BIRD to detect changes to the 
routing table /if/ it can identify the source of the change.

I think that Linux provides the information about the source.

> It sounds like I will likely need to use a pipe to "leak" (is that the 
> proper term?) the default route from kernel table 253 into RIP and 
> filter the default out so that it doesn't get populated into kernel 
> routing table 254.

After (re)reading the Pipe documentation 
(https://bird.network.cz/?get_doc&v=20&f=bird-6.html#ss6.8) it seems as 
if I'm going to logically have three different RIBs (if that's the 
proper term).

One for each kernel routing table (253 & 254) and the view that RIP has.

I think that I will need to import from the default_rib (253) into RIP 
-and- filter said default from RIP so that it doesn't get into the 
main_rib (254).

Or am I going to need a 3rd table inside of BIRD which does the following:

  - Imports all from main_rib (254)
  - Exports all to main_rib (254) EXCEPT the default.
  - Imports all from default_rib (253)
  - Exports none to default_rib (253)

Please stop me if that's not the track that I should be going down.



-- 
Grant. . . .
unix || die

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