Hello,
we are facing an issue with Intel 100G E810-C card. If we change
number of channels using ethtool -L, LLDP packets stop to be forwarded
to the network stack and user space.
Firmware-based lldp agent is disabled:
# ethtool --show-priv-flags hge11
Private flags for hge11:
link-down-on-close : off
fw-lldp-agent : off
vf-true-promisc-support: off
mdd-auto-reset-vf : off
vf-vlan-pruning : off
legacy-rx : off
[ 363.664628] ice 0000:41:00.0: The DDP package was successfully
loaded: ICE COMMS Package version 1.3.45.0
[ 363.983822] ice 0000:41:00.0: 252.048 Gb/s available PCIe bandwidth
(16.0 GT/s PCIe x16 link)
[ 364.003040] ice 0000:41:00.0: PTP init successful
[ 364.202873] ice 0000:41:00.0: DCB is enabled in the hardware, max
number of TCs supported on this port are 8
[ 364.202880] ice 0000:41:00.0: FW LLDP is disabled, DCBx/LLDP in SW mode.
[ 364.203045] ice 0000:41:00.0: Commit DCB Configuration to the hardware
The channels are set to the default values:
ethtool -l hge11
Channel parameters for hge11:
Pre-set maximums:
RX: 64
TX: 64
Other: n/a
Combined: 64
Current hardware settings:
RX: 0
TX: 0
Other: n/a
Combined: 64
We are able to see the LLDP frames:
tcpdump -i hge11 -nn 'ether proto 0x88cc'
16:21:08.528229 4c:ae:a3:6a:80:ee > 01:80:c2:00:00:0e, ethertype LLDP
(0x88cc), length 347: LLDP, length 333: test-hp5945
16:21:09.528501 4c:ae:a3:6a:80:ee > 01:80:c2:00:00:0e, ethertype LLDP
(0x88cc), length 347: LLDP, length 333: test-hp5945
16:21:10.528325 4c:ae:a3:6a:80:ee > 01:80:c2:00:00:0e, ethertype LLDP
(0x88cc), length 347: LLDP, length 333: test-hp5945
16:21:11.528217 4c:ae:a3:6a:80:ee > 01:80:c2:00:00:0e, ethertype LLDP
(0x88cc), length 347: LLDP, length 333: test-hp5945
However, if we changed the number of channels, e.g.:
ethtool -L hge11 combined 63
no LLDP frames are seen using tcpdump.
There is a workaround - enable and disable fw-lldp-agent using ethool.
However enabling/disabling fw-lldp-agent using the ethtool flaps the
link which is a problem as a connectivity is lost for a short time period.
Kernel version is 6.8.2, but we see the issue with previous versions as
well. Firmware version is
ethtool -i hge11
driver: ice
version: 6.8.2
firmware-version: 4.40 0x8001c967 1.3534.0
lspci info:
41:00.1 Ethernet controller: Intel Corporation Ethernet Controller
E810-C for QSFP (rev 02)
Subsystem: Intel Corporation Ethernet Network Adapter E810-C-Q2
Product Name: Intel(R) Ethernet Network Adapter E810-CQDA2
Read-only fields:
[V1] Vendor specific: Intel(R) Ethernet Network Adapter E810-CQDA2
[PN] Part number: K91258-011
[SN] Serial number: 6CFE545A0C20
[V2] Vendor specific: 4022
Best regards,
M.
