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bgp-contd: script check-connectivity

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Add a script for testing connectivity. Basically ping every router
from every router.

Edit by Knorrie:
* Ignore all the crap that ping outputs
* Test all links, don't stop when one fails.
* Insert commented out extra [OK] output that can be enabled quickly to
  also see all connections that succeed
This commit is contained in:
Yuri Volchkov
2017-11-08 18:10:10 +01:00
committed by Hans van Kranenburg
parent d41fdd708d
commit 101b25edd0
2 changed files with 17 additions and 1 deletions
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2
bgp-contd/README.md
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@@ -201,7 +201,7 @@ Now, do the following things:
2001:db8:20::/48 via 2001:db8:0:5::20 on ebgp_r20 [ebgp_r20 2015-11-28] * (100) [AS65020i] 2001:db8:20::/48 via 2001:db8:0:5::20 on ebgp_r20 [ebgp_r20 2015-11-28] * (100) [AS65020i]
2001:db8:10::/48 via 2001:db8:10:4::10 on ebgp_r10 [ebgp_r10 2015-11-28] * (100) [AS65010i] 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. * 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 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.
* 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. * 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.

16
bgp-contd/lxc/check_connectivity.sh Executable file
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@@ -0,0 +1,16 @@
#!/bin/sh
routers='0 1 2 10 11 12 20'
for src in $routers
do
for dst in $routers
do
lxc-attach -n R$src -- ping6 -c 1 r$dst >/dev/null 2>&1
if [ $? -ne 0 ]
then
echo "[FAIL] R$src -> R$dst"
#else
# echo "[OK] R$src -> R$dst"
fi
done
done