Introduction
Summary
keywords
TODO
HW
Exercise*
Next time
BGP
BGP is over Transport layer connection. BGP advertisement is about inter domain.
The router supporting BGP also need to support Transport. (L4? router is needed) It is because security, Reliability is needed.
import policy,
They will decide whether they will receive the importing datas.
export policy.
What if there is multiple paths advertised?
they will first see the policies, and if both are available, it will choose the minimum cost.
BGP messages
Why different intra-inter
Hot potato router
choose the local gateway that has least intra-domain cost. (based on OSPF)
policy can change the topology perspective network
export policies to not advertised