I've a small confusing regarding the following configuration on iBGP router
If i'm configuring iBGP neighbor using loopback interfaces i would normally add the
command neighbor x.x.x.x update-source loopback 0 to specify the source address of the packets
Now when advertising an external route (from an eBGP neighbor) to an iBGP neighbor i need to configure
neighbor x.x.x.x next-hop-self.
i just want to know if the next-hop-self command means the exit interface on my iBGP router or the loopback address.