I'm having a very similar issue with the same hardware. Do you think it might be the same problem? If it is, then it was not actually fixed in jammy (I'm using a kernel that supposedly have it already fixed). - same hardware --> a1:00.0 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02) - ubuntu 22.04: `5.15.0-83-generic #92-Ubuntu SMP Mon Aug 14 09:30:42 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux` - using a bond over the two ports of the same card, at 25Gbps to two different switches - bond is using LACP with hash layer3+4 and fast timeout - machine installed by maas. No issues during installation, but at that time bond is not formed yet - later when installed linix is booted, the bond is up and working without issues - it works for about 2 to 3 hours fine, then the issue starts (may or may not be related to network load, but it seems that it is triggered by some tests that I run after openstack finishes installing) - one of the legs of the bond freezes and everything that would go to that lag is discarded, in and out, ping to random external hosts start losing every second packet - after some time you can see on the kernel log messages about "NETDEV WATCHDOG: enp161s0f0 (ice): transmit queue 166 timed out" and a stack trace - the switch does log that the bond is flapping [ 6337.489648] ------------[ cut here ]------------ [ 6337.489653] NETDEV WATCHDOG: enp161s0f0 (ice): transmit queue 166 timed out [ 6337.489663] WARNING: CPU: 12 PID: 0 at net/sched/sch_generic.c:477 dev_watchdog+0x277/0x280 [ 6337.489669] Modules linked in: nf_conntrack_netlink geneve ip6_udp_tunnel udp_tunnel xt_CT dm_crypt scsi_transport_iscsi veth nfnetlink_cttimeout openvswitch nsh nf_conncount unix_diag nft_masq zfs(PO) zunico de(PO) zzstd(O) zlua(O) zavl(PO) icp(PO) zcommon(PO) znvpair(PO) spl(O) vhost_vsock vmw_vsock_virtio_transport_common vhost vhost_iotlb vsock xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_t cpudp nft_compat nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_counter nf_tables nfnetlink bridge sunrpc nvme_fabrics 8021q garp mrp stp llc bonding tls intel_rapl_msr intel_rapl_common amd 64_edac edac_mce_amd ipmi_ssif binfmt_misc kvm_amd kvm dell_wmi ledtrig_audio sparse_keymap video nls_iso8859_1 rapl irdma dell_smbios dcdbas i40e wmi_bmof dell_wmi_descriptor ib_uverbs ib_core ccp ptdma k10temp acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter mac_hid sch_fq_codel dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua ramoops reed_solomon [ 6337.489754] pstore_blk pstore_zone efi_pstore ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c r aid1 raid0 multipath linear cdc_ether usbnet mii mgag200 i2c_algo_bit drm_kms_helper syscopyarea crct10dif_pclmul sysfillrect crc32_pclmul sysimgblt ghash_clmulni_intel bcache fb_sys_fops crc64 aesni_intel crypt o_simd cec rc_core nvme ahci cryptd xhci_pci ice tg3 libahci drm megaraid_sas i2c_piix4 nvme_core xhci_pci_renesas wmi [ 6337.489809] CPU: 12 PID: 0 Comm: swapper/12 Tainted: P O 5.15.0-83-generic #92-Ubuntu [ 6337.489812] Hardware name: Dell Inc. PowerEdge R7525/03WYW4, BIOS 2.12.4 07/26/2023 [ 6337.489814] RIP: 0010:dev_watchdog+0x277/0x280 [ 6337.489817] Code: eb 97 48 8b 5d d0 c6 05 2a e2 67 01 01 48 89 df e8 2e 5f f9 ff 44 89 e1 48 89 de 48 c7 c7 b8 ec 0d 8c 48 89 c2 e8 65 d6 19 00 <0f> 0b eb 80 e9 af 68 23 00 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 [ 6337.489818] RSP: 0018:ffffa4e6d986ce70 EFLAGS: 00010282 [ 6337.489820] RAX: 0000000000000000 RBX: ffff950b843af000 RCX: 0000000000000027 [ 6337.489821] RDX: ffff9489bd520588 RSI: 0000000000000001 RDI: ffff9489bd520580 [ 6337.489822] RBP: ffffa4e6d986cea8 R08: 0000000000000003 R09: ffffffffffe3d588 [ 6337.489823] R10: 756575712074696d R11: 736e617274203a29 R12: 00000000000000a6 [ 6337.489824] R13: ffff950b9a613b80 R14: 00000000000000fd R15: ffff950b843af4c0 [ 6337.489825] FS: 0000000000000000(0000) GS:ffff9489bd500000(0000) knlGS:0000000000000000 [ 6337.489826] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6337.489827] CR2: 00007f89d69a0008 CR3: 00000101037be003 CR4: 0000000000770ee0 [ 6337.489828] PKRU: 55555554 [ 6337.489829] Call Trace: [ 6337.489830] [ 6337.489834] ? show_trace_log_lvl+0x1d6/0x2ea [ 6337.489839] ? show_trace_log_lvl+0x1d6/0x2ea (cut) [ 6337.489963] ice 0000:a1:00.0 enp161s0f0: tx_timeout: VSI_num: 6, Q 166, NTC: 0x1d, HW_HEAD: 0x52, NTU: 0x53, INT: 0x0 [ 6337.489967] ice 0000:a1:00.0 enp161s0f0: tx_timeout recovery level 1, txqueue 166 [ 6339.354957] bond0: (slave enp161s0f0): link status definitely down, disabling slave [ 6339.386095] ice 0000:a1:00.0: Removed PTP clock [ 6339.541782] ice 0000:a1:00.0: Clearing default VSI, re-enable after reset completes [ 6340.184069] ice 0000:a1:00.0: PTP init successful [ 6350.054268] ice 0000:a1:00.0: VSI rebuilt. VSI index 0, type ICE_VSI_PF [ 6350.092303] ice 0000:a1:00.0: VSI rebuilt. VSI index 383, type ICE_VSI_CTRL [ 6350.162346] bond0: (slave enp161s0f0): link status definitely up, 25000 Mbps full duplex