Now it's time to talk about the third and last rule
to route reflectors and route reflector clients.
And that's how eBGP sessions are handled.
Let's jump to the whiteboard, draw it up.
So at this point, we've gotten a pretty good lay of the land
as to how iBGP sessions are going
to be handling network advertisements with a route
reflector.
We've got advertisements coming in from non-clients,
advertisements coming in from clients.
We know how the behavior is going to act.
But what happens when an advertisement comes in
from an eBGP neighbor? WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
from an eBGP neighbor?
And what does R2 do with these advertisements from iBGP
with respect to eBGP?
Well, that's what this Nugget's all about.
When an advertisement comes in from R4, an eBGP neighbor,
it will be sent everywhere.
This is the default behavior anyways, regardless
of how route reflector clients work.
And when advertisements come in from either R1, or R3, or R11--
basically, when advertisements come in
from clients or non-clients, they'll be sent towards R4. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
from clients or non-clients, they'll be sent towards R4.
The thing to keep in mind here is going back
to that very first nuance, and that's
how next hops are changed as they go along the path.
As a route exits R2 towards R4, R2
is going to change the next hop to be itself.
As R4 sends routes into R2, R2 is
going to advertise them towards its iBGP peers,
but it doesn't change the next hop
unless you do something like next hop self
to explicitly demonstrate that.
So what we're going to do in the next Nugget WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
So what we're going to do in the next Nugget
is we're going to fire up the virtual lab.
We're going to advertise routes from R1, R3, and R4,
and just verify that they're showing up in the local BGP
tables.
In the meantime, this has been rule number 3
of route reflectors.
I hope this has been informative for you,
and I'd like to thank for viewing.