dmesg from the server in question:
[339893.721555] ------------[ cut here ]------------ [339893.721566] WARNING: at net/sched/sch_generic.c:259 dev_watchdog+0x270/0x280() [339893.721568] NETDEV WATCHDOG: ens1f0 (e1000e): transmit queue 0 timed out [339893.721570] Modules linked in: vhost_net macvtap macvlan nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd sunrpc fscache xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT iptable_filter ip_tables tun bridge 8021q garp stp mrp llc bonding vfat fat coretemp kvm_intel iTCO_wdt kvm cdc_ether crc32c_intel ipmi_devintf usbnet iTCO_vendor_support mii i7core_edac serio_raw lpc_ich ipmi_si ioatdma ipmi_msghandler edac_core i2c_i801 shpchp pcspkr dca mfd_core acpi_cpufreq ext4 mbcache jbd2 sd_mod crc_t10dif crct10dif_common sr_mod cdrom mgag200 syscopyarea sysfillrect sysimgblt i2c_algo_bit drm_kms_helper ttm ata_generic drm pata_acpi mptsas ata_piix scsi_transport_sas libata [339893.721628] e1000e mptscsih mptbase i2c_core ptp bnx2 pps_core dm_mirror dm_region_hash dm_log dm_mod [339893.721637] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.0-229.4.2.el7.x86_64 #1 [339893.721638] Hardware name: IBM System x3550 M2 -[7946W1A]-/49Y6512, BIOS -[D6E162AUS-1.20]- 05/07/2014 [339893.721640] ffff88085fc03d90 b38c2f3260a6249e ffff88085fc03d48 ffffffff81604eaa [339893.721645] ffff88085fc03d80 ffffffff8106e34b 0000000000000000 ffff8810517c4000 [339893.721648] ffff881051aa7080 0000000000000001 0000000000000000 ffff88085fc03de8 [339893.721651] Call Trace: [339893.721653] <IRQ> [<ffffffff81604eaa>] dump_stack+0x19/0x1b [339893.721664] [<ffffffff8106e34b>] warn_slowpath_common+0x6b/0xb0 [339893.721667] [<ffffffff8106e3ec>] warn_slowpath_fmt+0x5c/0x80 [339893.721671] [<ffffffff8151e090>] dev_watchdog+0x270/0x280 [339893.721674] [<ffffffff8151de20>] ? dev_graft_qdisc+0x80/0x80 [339893.721679] [<ffffffff8107e046>] call_timer_fn+0x36/0x110 [339893.721682] [<ffffffff8151de20>] ? dev_graft_qdisc+0x80/0x80 [339893.721684] [<ffffffff8107fecf>] run_timer_softirq+0x21f/0x320 [339893.721688] [<ffffffff81077bf7>] __do_softirq+0xf7/0x290 [339893.721692] [<ffffffff8161671c>] call_softirq+0x1c/0x30 [339893.721697] [<ffffffff81015de5>] do_softirq+0x55/0x90 [339893.721699] [<ffffffff81077f95>] irq_exit+0x115/0x120 [339893.721702] [<ffffffff81617395>] smp_apic_timer_interrupt+0x45/0x60 [339893.721706] [<ffffffff81615a5d>] apic_timer_interrupt+0x6d/0x80 [339893.721707] <EOI> [<ffffffff810ce567>] ? clockevents_notify+0x127/0x140 [339893.721715] [<ffffffff814aaa2f>] ? cpuidle_enter_state+0x4f/0xc0 [339893.721718] [<ffffffff814aab65>] cpuidle_idle_call+0xc5/0x200 [339893.721722] [<ffffffff8101d21e>] arch_cpu_idle+0xe/0x30 [339893.721726] [<ffffffff810c6985>] cpu_startup_entry+0xf5/0x290 [339893.721730] [<ffffffff815f33e7>] rest_init+0x77/0x80 [339893.721735] [<ffffffff81a45057>] start_kernel+0x429/0x44a [339893.721738] [<ffffffff81a44a37>] ? repair_env_string+0x5c/0x5c [339893.721741] [<ffffffff81a44120>] ? early_idt_handlers+0x120/0x120 [339893.721743] [<ffffffff81a445ee>] x86_64_start_reservations+0x2a/0x2c [339893.721746] [<ffffffff81a44742>] x86_64_start_kernel+0x152/0x175 [339893.721748] ---[ end trace b05b250bdafd520d ]--- [339893.721803] e1000e 0000:15:00.0 ens1f0: Reset adapter unexpectedly [339893.778541] bonding: bond1: link status definitely down for interface ens1f0, disabling it [339897.020473] e1000e: ens1f0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None [339897.080356] bonding: bond1: link status definitely up for interface ens1f0, 1000 Mbps full duplex. [343741.003715] virbr201: port 2(vnet0) entered disabled state [343741.004401] device vnet0 left promiscuous mode [343741.004421] virbr201: port 2(vnet0) entered disabled state [344116.096123] virbr203: port 2(vnet2) entered disabled state [344116.097088] device vnet2 left promiscuous mode [344116.097113] virbr203: port 2(vnet2) entered disabled state [344524.383123] virbr201: port 1(bond1.201) entered disabled state [344524.384074] virbr203: port 1(bond1.203) entered disabled state [344524.385178] virbr204: port 1(bond1.204) entered disabled state [344524.386135] device bond1 left promiscuous mode [344524.386148] device ens1f0 left promiscuous mode [344524.386255] device ens3f0 left promiscuous mode [344524.386518] virbr301: port 1(bond1.301) entered disabled state [344531.513072] 8021q: adding VLAN 0 to HW filter on device bond1 [344531.513127] device bond1 entered promiscuous mode [344531.513136] device ens1f0 entered promiscuous mode [344531.513183] device ens3f0 entered promiscuous mode [344531.513403] virbr201: port 1(bond1.201) entered forwarding state [344531.513409] virbr201: port 1(bond1.201) entered forwarding state [344531.513540] virbr203: port 1(bond1.203) entered forwarding state [344531.513545] virbr203: port 1(bond1.203) entered forwarding state [344531.513669] virbr204: port 1(bond1.204) entered forwarding state [344531.513677] virbr204: port 1(bond1.204) entered forwarding state [344531.513823] virbr301: port 1(bond1.301) entered forwarding state [344531.513828] virbr301: port 1(bond1.301) entered forwarding state
Switch log:
33w6d: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/11, changed state to down 33w6d: %LINK-3-UPDOWN: Interface GigabitEthernet0/11, changed state to down 33w6d: %LINK-3-UPDOWN: Interface GigabitEthernet0/11, changed state to up 33w6d: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/11, changed state to up