BGP Lab Exercise 2
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1.  Building on the previous exercise, we are now going to connect to
   a neighbouring ISP in our locality.  For the lab, you will connect
   to the Router Team directly next to you.  For example, Router A
   will connect to Router B, Router C will connect to Router D, etc.
   Use the Serial interface and the supplied serial cable to do this
   (it may well be already connected for you by the lab instructors).


2.  Agree between you and your neighbouring AS whose address block you
   will take IPv4 addresses from for the point to point link.

   IPv4 Address Block for the Point to Point Link:


   Likewise, for the IPv6 addressing for the point to point link,
   agree whose address block you will take.

   IPv6 Address Block for the Point to Point link:


3.  Write down the AS number of the network you are connecting to:

   AS Number:


4.  Configure eBGP with this AS.  Use the examples in the previous
   exercise to guide you.  Don't forget to set up both IPv4 and IPv6
   BGP peerings.


5.  Check the BGP process for IPv4 using "sh ip bgp" and sub commands
   to see what prefixes you are receiving from your neighbouring AS.
   For IPv6, remember that the syntax is "sh bgp ipv6" and sub
   commands.  Note that "sh bgp ipv4" will also work to show you the
   state of the IPv4 BGP table.


6.  What routes do you see?  What paths are available?  Describe what
   you see in the space below:








7.  We are now at the stage where we are talking BGP with our upstream
   ISP and BGP with the neighbouring ISP in our locality.  We are
   using both IPv4 and IPv6 for this peering.  Note that this is the
   common way that ISPs configure IPv4 and IPv6 peerings - whatever is
   done with IPv4 is repeated with IPv6.

   But we have no filters and as you saw in the previous step.  We are
   now going to fix this using two different methods in the next two
   exercises.