BGP decision chain
I did some playing with BGP and OSPF, and came across something i was expection to behaves differentlly.
I was under the impresion that the Administrative Distance is the first that is looked when you have 2 "identical routes", but not in case of iBGP and eBGP.
I did the following: RA conected to R1, R2 and R3.
R1-RA is OSPF
R2-RA is iBGP
R3-RA is eBGP
R1,R2,R3 inject the same prefix A
I got what i expected the eBGP os prefered, the OSPF then iBGP.
Then i played with LocalPref and modify the LP on the iBGP from R2 to 130.
For me nothing should have changed, but i did The OSPF toute is the best one, then the iBGP and at the end the eBGP.
The conclusion i got is that: the BGP decision making is done first on the sum of iB and eB prefixes, then the AD.
Is my conclusion a good one?