Ok on review of the previous
page we know that www.logicalpackets.com is located on the 220.127.116.11/21 subnet.
Ok now click the link
"BGP Play" This
link is also available in the site here so there is no need to book mark it.
Java is required here so if you do not have it then you will have to get it. Click the button Start BGP play.
When the interface spawns in Java
it will look like the image above. Note I have entered 18.104.22.168/21 which we
Now the return should look
something like the above for this network. Now don't be overwhelmed here you are
seriously learning allot by all these numbers. The hosts ASN is
a globally unique number that is used to identify an Autonomous System (AS) and
it enables an AS to exchange exterior routing information with neighboring AS
numbers. An AS is a connected group of IP networks that adhere to a single and
clearly defined routing policy.
You can see from the query sample
above that www.logicalpackets.com is part of the as26286 network. Ok what
is that? A host has to pay ARIN or RIPE to generate a unique ASN for their
network if they plan to use BGP protocol and enjoy the multi-homed benefits of
By clicking on the ASN or the
number you can see
at the top of the page who owns the AS # in this example as26286 belongs to
ActiveServers, Inc. You can now go to
Arin Click Here. Type in that number in the whois query and all the
registration information about the company will come back to you. If your
hosts network does not have a connection on each side of their AS they are not
multi-homed. ActiveServers has a private peer with as4323 which is Time Warner
and a peer with Cogent as174. By standing in the middle of these two large
networks they have the benefit of both networks with regard to routing.
Redundancy of their network is greater than the Time Warner or Cogent networks
alone. Because either could be doing maintenance or be completely unreachable
and a route is still available on the other peering arrangement.
If if your host is not listed or does not have a AS number
certainly it is not their network. Previous Page.