FYI, I was being hit by this and the issue disappeared once I updated
the firmware on those NICs to 14.31.1014. The problematic firmware
version I had was 14.26.1040. Not only did I see those errors, but I
actually saw traffic being dropped.
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With https://patchwork.ozlabs.org/patch/1224104/ and the secondary port
link set to down I get reliable network connections to instances with
offloaded ports.
Upstream developers pointed me to a commit that might resolve this.
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Bug 1852077 - however that is marked fix released so I think something
else is at fault.
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https://bugs.launchpad.net/bugs/1851819
Title:
bond: An illegal loopback occurred
Did a bit more testing; the error message is only seen when the card is
in offload mode; when its in legacy mode (the default) the error message
is not seen.
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** Tags added: hwoffload
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https://bugs.launchpad.net/bugs/1851819
Title:
bond: An illegal loopback occurred on slave
Status in linux package in Ubuntu:
Confirmed
Bug
apport information
** Tags added: apport-collected
** Description changed:
Mellanox ConnectX 5 adapter configured with LACP bonding; adapters in
switchdev (offload) mode with VF's configure on both ports.
Kernel continually reports:
Nov 8 10:57:51 node-laveran kernel: [
** Package changed: linux-meta-hwe-edge (Ubuntu) => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1851819
Title:
bond: An illegal loopback occurred on slave
Status in
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