RE: de-peering and peering

Let us say Network A has a peering Agreement with Network B.
Now let us
say Network X wants to reach Network B. X and B do not have a peering
agreement. Can Network A use the peering Link between A nd B to route
the traffic of network X.

If there is an agreement in place (ie. A and B exchanging customer prefixes
and X is a customer of A).

What are the mechanisms in place in B's network to detect
that Network A
is transiting the data( in this case network B looser) from Network X?

You should be able to filter. RADB is one solution that may make it more
manageable. But if your not filtering it will still require a transit
provider to get the traffic back to X (think asymmetry).


masquerading transit data as if its originating from its own n

Steve Naslund wrote:

> Peering arrangements are when networks make connections
between each other.
> Usually networks of
> equal size (traffic wise) will try to peer with each other.
Although this
> may not be technically correct here
> are the basics.
> Peering - connections between networks that our
cooperative, there is no
> cost other than the physical
> connection itself. That cost might be shared or the
smaller network may pay
> for the physical connection.
> Carries traffic that terminates on one of the two networks.
i.e. you can't
> go through the peering connection
> you have with my network to get to another network.
Consider peering
> connections to be express routes between
> two networks. You generally can get this type of
connection if you are a
> service provider or public institution.
> It is harder to get if you are a private entity unless you
can show a
> benefit for me in peering with you. In
> other words, I would like the traffic flow to be as
symmetric as possible or
> improve service for an important
> customer.
> Transit - connections between networks that I pay for an
allow me to get to
> anything on the Internet. These
> are generally very expensive but allow you to reach anyone,
> Consider transit connections to be the
> superhighway with exits to everywhere but with a lot of
traffic. Anyone who
> buys service from an upstream
> provider has a transit connection although they usually
refer to full BGP
> sessions.
> Now you can see that if I am paying for a transit
connection through say
> UUnet and I have a ton of traffic going
> to say Exodus, it is in my best interest to try to
establish a peering
> agreement with Exodus so that I don't have
> to use my expensive bandwidth from UUnet. I can also get a
more direct
> route to where my customers want to go and
> avoid congestion.
> Peering and de-peering have a huge impact on traffic
engineering because
> lack of peering means that most traffic
> is being carried by the biggest transit providers like
UUnet and Cable &
> Wireless. Peering makes the Internet
> more redundant and reliable and evens out the loads better. Traffic
> engineering is all about peering and which
> paths are preferred over others. I your only connections
are transit then
> there are not many options for
> traffic engineering.
> Steve

[]On Behalf Of