Hi Chris,
Some new clarifications are in order. Please disregard the "ARP
Inspection" claim. That feature wasn't even enabled.
Here's a very simplified drawing of the setup.
+-------------------+
| ARP
CACHE |
+------------+ |
(expires 4 hours) |
| | |
10.1.1.11 22:22
| | |
10.1.2.100 33:33
| ROUTER | |
|
| | |
|
| | |
|
| |
+-------------------+
+--------------+
| |
| |
+---------------+ +------------------+
| SWITCH A | | SWITCH B |
+--------+ | | |
| +---------------+ +------------------+
| | |
| | |
+------------------+ +------------------+ +------------------+
| | | | | |
| | | 10.1.1.11 | | 10.1.2.100 |
| | | 255.255.255.0 | | 255.255.255.0 |
| | | | | REGION CTLR |
| MAAS MACHINE 2 | | MAAS MACHINE 1 | | |
| MAC 22:22 | | MAC 11:11 | | MAC 33:33 |
+------------------+ +------------------+ +------------------+
1) Assuming Machine #2 was last deployed and then released within the past 4
hours, using the IP 10.1.1.11. Thus the router already has an ARP entry in its
cache matching 10.1.1.11 to MAC 22:22.
2) Machine #1 is starting Deployment and happens to receive 10.1.1.11 from
Controller to use for ephemeral PXE IP.
3) Machine #1 sends packet to 10.1.2.100:5240
4) Controller sees pack from 10.1.1.11
5) Controller responds to 10.1.1.11
6) Machine #1 never sees the response packet
We suspect the response packet was sent Machine #2. We are actively
parsing the pcap data to confirm.
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1677668
Title:
no GARPs during ephemeral boot
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