Vypadek serveru

Zdravim, mel bych dotaz ohledne vypadku serveru. Vypadl na par minut bezduvodne (z meho pohledu) po chvili zase nabeh. v dmesg sem nasel toto, co by to mohlo zpusobit? Vypada to ze zdechla sitovka ale nevim ci vinou
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[695879.000045] WARNING: at /build/buildd-linux-2.6_2.6.32-45-i386-yQfQSv/linux-2.6-2.6.32/debian/build/source_i386_none/net/sched/sch_generic.c:261 dev_watchdog+0xbd/0x15d()
[695879.000053] Hardware name: PowerEdge 6650
[695879.000059] NETDEV WATCHDOG: eth0 (tg3): transmit queue 0 timed out
[695879.000064] Modules linked in: ip6table_filter ip6_tables pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv quota_v2 quota_tree iptable_mangle iptable_nat nf_nat ipt_REJECT xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_multiport iptable_filter ip_tables x_tables loop snd_pcm snd_timer psmouse serio_raw snd soundcore snd_page_alloc i2c_piix4 evdev i2c_core processor button dcdbas shpchp pci_hotplug pcspkr ext3 jbd mbcache raid10 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 raid0 multipath linear md_mod sr_mod cdrom ata_generic sd_mod crc_t10dif sg ohci_hcd aic7xxx ehci_hcd scsi_transport_spi pata_serverworks thermal megaraid_mbox qla1280 tg3 megaraid_mm libphy usbcore floppy nls_base thermal_sys libata scsi_mod [last unloaded: scsi_wait_scan]
[695879.000236] Pid: 0, comm: swapper Not tainted 2.6.32-5-686-bigmem #1
[695879.000241] Call Trace:
[695879.000258]  [<c1036a81>] ? warn_slowpath_common+0x5e/0x8a
[695879.000267]  [<c11fa158>] ? dev_watchdog+0x0/0x15d
[695879.000276]  [<c1036adf>] ? warn_slowpath_fmt+0x26/0x2a
[695879.000285]  [<c11fa215>] ? dev_watchdog+0xbd/0x15d
[695879.000300]  [<c102ac30>] ? __wake_up+0x29/0x39
[695879.000310]  [<c1047dfe>] ? insert_work+0x71/0x78
[695879.000319]  [<c1048177>] ? delayed_work_timer_fn+0x0/0x28
[695879.000330]  [<c104186c>] ? run_timer_softirq+0x16a/0x1eb
[695879.000342]  [<c103bbce>] ? __do_softirq+0xaa/0x156
[695879.000351]  [<c103bcab>] ? do_softirq+0x31/0x3c
[695879.000359]  [<c103bd85>] ? irq_exit+0x26/0x58
[695879.000373]  [<c101968d>] ? smp_apic_timer_interrupt+0x6c/0x76
[695879.000385]  [<c1008b75>] ? apic_timer_interrupt+0x31/0x38
[695879.000399]  [<c101ff00>] ? native_safe_halt+0x2/0x3
[695879.000408]  [<c100d9cb>] ? default_idle+0x3c/0x5a
[695879.000417]  [<c10073b7>] ? cpu_idle+0x89/0xa2
[695879.000431]  [<c13e080d>] ? start_kernel+0x318/0x31d
[695879.000437] ---[ end trace 7bdbe04c5a85379e ]---
[695879.000444] tg3 0000:0a:01.0: eth0: transmit timed out, resetting
[695879.000501] tg3 0000:0a:01.0: eth0: DEBUG: MAC_TX_STATUS[00000008] MAC_RX_STATUS[00000008]
[695879.000555] tg3 0000:0a:01.0: eth0: DEBUG: RDMAC_STATUS[00000000] WDMAC_STATUS[00000000]
[695879.101043] tg3 0000:0a:01.0: tg3_stop_block timed out, ofs=2400 enable_bit=2
[695879.201484] tg3 0000:0a:01.0: tg3_stop_block timed out, ofs=1800 enable_bit=2
[695879.301723] tg3 0000:0a:01.0: tg3_stop_block timed out, ofs=4800 enable_bit=2
[695879.402307] tg3 0000:0a:01.0: tg3_stop_block timed out, ofs=3c00 enable_bit=2
[695879.502441] tg3 0000:0a:01.0: tg3_stop_block timed out, ofs=4c00 enable_bit=2
[695879.676769] tg3 0000:0a:01.0: eth0: Link is down
[695882.171316] tg3 0000:0a:01.0: eth0: Link is up at 100 Mbps, full duplex
[695882.171325] tg3 0000:0a:01.0: eth0: Flow control is off for TX and off for RX
Dotaz: Vypadek serveru
