| 23 Jun 2026 |
 matthewcroughan - nix.zone | well you would hope | 19:14:12 |
 Nico | Did you test it without the bridge? | 19:14:36 |
| Nico | Just ensure your tunnel actually works | 19:14:41 |
| Nico | give it static ip addresses on both ends and try to ping through the gre tunnel | 19:14:57 |
| Nico | from this point you can continue by adding the bridge on the real host and look at the traffic on the other side | 19:15:17 |
 casey © | as far as i knew, once you added an interface to a bridge, the addresses on the interface no longer work. | 19:15:25 |
| Nico | Not to sure about this, but thats pretty easy to test | 19:16:10 |
| Nico | Never tested it I think | 19:16:20 |
| Nico | Usually you don't want to manage the interface in any way if a bridge master has been set | 19:16:52 |
| matthewcroughan - nix.zone | So you mean like, just ip link add eogre type ip6gretap local 200:fe12:89ec:86b6:ce32:9e0a:389:44d3 remote 200:25e6:e48d:963:3c5e:6466:87d4:a951 | 19:16:54 |
| matthewcroughan - nix.zone | then bring it up | 19:17:05 |
| matthewcroughan - nix.zone | result of that is 6: eogre@NONE: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 65469 qdisc fq_codel state UNKNOWN group default qlen 1000 link/ether e6:69:2f:e1:80:8d brd ff:ff:ff:ff:ff:ff inet6 fe80::e469:2fff:fee1:808d/64 scope link proto kernel_ll valid_lft forever preferred_lft forever | 19:17:31 |
| matthewcroughan - nix.zone | You want me to add an IP address to that interface eogre@NONE ? | 19:18:07 |
| matthewcroughan - nix.zone | Why is it @NONE anyway? | 19:18:10 |
| Nico | Yea, and now do the other site | 19:18:13 |
| Nico | You can use fe80::e469:2fff:fee1:808d%eogre from the other side | 19:18:25 |
| Nico | * You should be able to ping fe80::e469:2fff:fee1:808d%eogre from the other side | 19:18:32 |
| matthewcroughan - nix.zone | oh link-local nice | 19:18:39 |
| matthewcroughan - nix.zone | I can, that works | 19:18:50 |
| matthewcroughan - nix.zone | So is that link-local stuff going over ygg? | 19:18:58 |
| matthewcroughan - nix.zone | looks like it since the response time is 50ms | 19:19:10 |
| Nico | yea, gre encapsulated. If you don't know how it looks like, I suggest opening wireshark and inspecting the headers | 19:19:26 |
| matthewcroughan - nix.zone | interesting | 19:19:50 |
| matthewcroughan - nix.zone | the link local ping stops working after adding eth0 and the gre to the bridge | 19:21:03 |
| casey © | how about a ping to your default gateway | 19:21:17 |
| matthewcroughan - nix.zone | the v4 default gateway? | 19:22:16 |
| casey © | yes. | 19:22:31 |
| matthewcroughan - nix.zone | I mean these are VMs, isn't that supposed to not wor | 19:22:39 |
| matthewcroughan - nix.zone | * I mean these are VMs, isn't that supposed to not work? | 19:22:41 |
| Nico | I assume: Once you create the bridge, eth0 (which is required for tun0 to work properly) is probally going down (because it has now br0 set as master), this way the ygg tunnel can no longer be established which results in the gre no longer working | 19:22:41 |
