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bgp-contd: too early to check connectivity to r20

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The first thing I did in this assignment is disabled connection
R1-R20. And spend some time trying to understand how it is even
supposed to work, before I scrolled down and read that it is not
supposed actually.

So let's not ask a person to check if he can reach ALL parts of the
network, but only reasonable for now parts.

Edit by Knorrie:
* Explicitely mention what can be disabled now, so that we don't run
  into the situation above. :)
This commit is contained in:
Yuri Volchkov 2017-11-08 19:01:02 +01:00 committed by Hans van Kranenburg
parent 101b25edd0
commit 815d129e72
1 changed files with 1 additions and 1 deletions
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bgp-contd/README.md
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@ -202,7 +202,7 @@ Now, do the following things:
2001:db8:10::/48 via 2001:db8:10:4::10 on ebgp_r10 [ebgp_r10 2015-11-28] * (100) [AS65010i]
* Check that you can reach every external network from every router in all of the three networks. You can use the script `bgp-contd/lxc/check_connectivity.sh` to check that every router can ping any other router.
* Try disabling some of the links between routers by using the `disable`/`enable` commands on the bird command line, and check if you still can reach all parts of the network.
* Try disabling the link between `R0` and `R11`, by using the `disable`/`enable` commands on the bird command line, from either side. Check if you still can reach all parts of the network. Do the same for the link between `R1` and `R10`. If this succeeds your iBGP configuration is correct.
* Change `import` and `export` filters in the `protocol bgp ebgp_r*` sections in `bird6.conf` so that you end up with a situation where all traffic is forced into an asymmetric traffic pattern in which traffic from `AS65000` to `AS65010` has to leave via `R1` to `R10`, and traffic back flows over `R11` to `R0`. Verify the changes seen in bird `show route all` output when you change filters.
## A closer look at the BIRD configuration