bonding: arp monitoring is failing with tuntap interfaces
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux (Ubuntu) |
Expired
|
Undecided
|
Unassigned | ||
Bug Description
[Impact]
When tuntap interfaces are slaves of a bonding interface, arp monitoring is unusable.
This is fixed upstream with commit a31d27fbed5d ("tun: fix bonding active backup with arp monitoring"). It will be included in linux v5.16.
https:/
[Test Case]
Create a bonding with two tuntap interfaces and arp monitoring configured. Before the patch, slave interfaces are flapping continuously.
Example:
Nov 19 16:12:28 dut-vm kernel: bond0: (slave ntfp2): link status definitely up
Nov 19 16:12:28 dut-vm kernel: bond0: (slave ntfp2): making interface the new active one
Nov 19 16:12:28 dut-vm kernel: bond0: active interface up!
Nov 19 16:12:31 dut-vm kernel: bond0: (slave ntfp2): link status definitely down, disabling slave
Nov 19 16:12:31 dut-vm kernel: bond0: now running without any active interface!
Nov 19 16:12:32 dut-vm kernel: bond0: (slave ntfp2): link status definitely up
Nov 19 16:12:32 dut-vm kernel: bond0: (slave ntfp2): making interface the new active one
Nov 19 16:12:32 dut-vm kernel: bond0: active interface up!
Nov 19 16:12:35 dut-vm kernel: bond0: (slave ntfp2): link status definitely down, disabling slave
Nov 19 16:12:35 dut-vm kernel: bond0: now running without any active interface!
Nov 19 16:12:36 dut-vm kernel: bond0: (slave ntfp2): link status definitely up
Nov 19 16:12:36 dut-vm kernel: bond0: (slave ntfp2): making interface the new active one
Nov 19 16:12:36 dut-vm kernel: bond0: active interface up!
Nov 19 16:12:37 dut-vm kernel: bond0: (slave ntfp3): link status definitely up
Nov 19 16:12:39 dut-vm kernel: bond0: (slave ntfp2): link status definitely down, disabling slave
Nov 19 16:12:39 dut-vm kernel: bond0: (slave ntfp3): making interface the new active one
[Regression Potential]
The patch is trivial, the potential regressions are low.
| description: | updated |
| summary: |
- bondig: arp monitoring is failing with tuntap interfaces + bonding: arp monitoring is failing with tuntap interfaces |
| Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote Missing required logs. | #1 |
| Changed in linux (Ubuntu): | |
| status: | New → Incomplete |
| Nicolas Dichtel (nicolas-dichtel) wrote | #2 |
| Launchpad Janitor (janitor) wrote | #3 |
| Changed in linux (Ubuntu): | |
| status: | Incomplete → Expired |
| Nicolas Dichtel (nicolas-dichtel) wrote | #4 |
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1951606
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.