Cisco and the AD of BGP
I was wondering about the AD of BGP and his implementation on various vendors.
For Alcatel, Juniper and Huawei, they use the same value for i and e BGP. And as you know, Cisco use two : 20 and 200.
On Cisco Routers, the Path Selection is based on the 7th* Attribute (eBGP > iBGP) ; whatever is the AD of eBGP/iBGP.
- For Exp., if AD of eBGP = 50 and iBGP = 30. The router chose the eBGP route.
In must cases, iBGP is not choosed because of his high AD.
Can some one explain me please, why this "separation" between iBGP and eBGP by Cisco ?
Thanks in advance,