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nixos/tests: use ::1 instead of anycast address (#96250)

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According to RFC4291[1], 2001:db8:: is the anycast address for the
prefix and will be answered by all routers responsible for this prefix.
This means that before the iputils bump, the ping from client to isp was
answered by the router and not by the ISP machine. Switching away from
the anycast address fixes this issue.

Credits for finding this go to @primeos.

[1]: https://tools.ietf.org/html/rfc4291#section-2.6.1

Fixes #96188
This commit is contained in:
Rouven Czerwinski 2020-08-25 22:29:22 +02:00 committed by GitHub
parent a26ffb006b
commit 7db58b93d0
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1 changed files with 4 additions and 4 deletions
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8
nixos/tests/systemd-networkd-ipv6-prefix-delegation.nix
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@ -31,7 +31,7 @@ import ./make-test-python.nix ({pkgs, ...}: {
firewall.enable = false;
interfaces.eth1.ipv4.addresses = lib.mkForce []; # no need for legacy IP
interfaces.eth1.ipv6.addresses = lib.mkForce [
{ address = "2001:DB8::"; prefixLength = 64; }
{ address = "2001:DB8::1"; prefixLength = 64; }
];
};
@ -260,7 +260,7 @@ import ./make-test-python.nix ({pkgs, ...}: {
client.wait_until_succeeds("ping -6 -c 1 FD42::1")
# the global IP of the ISP router should still not be a reachable
router.fail("ping -6 -c 1 2001:DB8::")
router.fail("ping -6 -c 1 2001:DB8::1")
# Once we have internal connectivity boot up the ISP
isp.start()
@ -273,11 +273,11 @@ import ./make-test-python.nix ({pkgs, ...}: {
# wait until the uplink interface has a good status
router.wait_for_unit("network-online.target")
router.wait_until_succeeds("ping -6 -c1 2001:DB8::")
router.wait_until_succeeds("ping -6 -c1 2001:DB8::1")
# shortly after that the client should have received it's global IPv6
# address and thus be able to ping the ISP
client.wait_until_succeeds("ping -6 -c1 2001:DB8::")
client.wait_until_succeeds("ping -6 -c1 2001:DB8::1")
# verify that we got a globally scoped address in eth1 from the
# documentation prefix