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LLDP not working on X710 adapter, i40e driver
Needs reporter action, HighPublicBUG


When LLDP is configured, on all interfaces or on specific interfaces LLDP packets are sent but nothing is received.

With lldpcli this can be confirmed

lldpcli show stat
Interface:    eth1
  Transmitted:  7
  Received:     0
  Discarded:    0
  Unrecognized: 0
  Ageout:       0
  Inserted:     0
  Deleted:      0

And old discussion on Intel forum suggests this has ben long existing in the X710 network card.
I can confirm it also exists on Intel X722 interfaces.

The forum suggests disabling the lldp handling on the nic and let the kernel take care of it.
echo lldp stop > /sys/kernel/debug/i40e/<ifid>/command

This needs to be run as root and the right interface ids need to be picked for the specific cards.


Difficulty level
Unknown (require assessment)
Why the issue appeared?
Will be filled on close
Is it a breaking change?
Unspecified (possibly destroys the router)
Issue type
Bug (incorrect behavior)

Related Objects

Event Timeline

Unknown Object (User) added a subscriber: Unknown Object (User).Apr 13 2020, 10:28 PM

Note: will be good to disable this by udev rule for i40e

Found that in drivers 2.3.6 and newer this should also work:

sudo ethtool --set-priv-flags <interface name> disable-fw-lldp on

This is probably easier, as you do not have to find our the interface ids.
But on Vyos 1.2.5-epa i get:
Cannot set private flags: Operation not supported

This issue exists in firmware 6.8 and 7.1.
Starting with 7.1 i can see that the disable command 'sudo ethtool --set-priv-flags <interface name> disable-fw-lldp on' also works.

I do not have that hardware available, but a possible solution could be the following snippet which could be run on system boot:

for f in /sys/class/net/*; do
    dev=$(basename $f)
    driver=$(readlink $f/device/driver/module)
    if [[ -n $driver ]] && [[ x"$(basename $driver)" -eq x"i40e" ]]; then
        sudo ethtool --set-priv-flags $dev disable-fw-lldp on

@Merijn you could test that? It could be part of /opt/vyatta/sbin/rl-system.init

erkin set Issue type to Bug (incorrect behavior).Aug 30 2021, 7:07 AM
erkin removed a subscriber: Active contributors.
c-po changed the task status from Open to Needs reporter action.Jan 22 2024, 9:07 PM