BGP doubt-CodePudding

14 px] [size=1. By BGP can be declared inside a AS the existence of the subnet, since EBGP already can provide this AS different AS border routing network prefix, so the service (declare this AS subnet) is redundant? Can this AS internal IGP routing AS an external group!

2. Under the Internet environment, AS if all over the world are announced AS the subnet can cause eBGP routing information is too large and collapse?

3. In the same AS (this AS a big) presence of multiple levels of small AS (small AS used between eBGP?) The structure of the?

4. A AS each internal router is needed to support iBGP (or using MPLS for border router connection?)

Each 5. AS internal routers need to generate all external AS turn published?

Novice self-study really don't understand, please answer! [/size]
CodePudding user response:
Black book of 257 pages
CodePudding user response:
Personally, I think, not necessarily correct:
=MAY 1, "can", is not a MUST, not to be used most of the time, when need not go out all the details within, selectively leaked some necessary leaked,
2, will be
3, I don't think officially registered AS a logical level are flat,
4, do not need
5, don't need, the majority of the AS internal routers depend on external default routes to solve the problem,
Not exactly a ra, are for reference only.