Hi,

Currently one of my server have intermittent network issue. The weird thing is it only happening between 1.30am-6.30am. I have check on the cron and did not suspect anything that cause the issue and never experience the issue before with Centos 5.3.

Code:
root@svr7 [~]# ethtool -i eth0
driver: e1000
version: 7.3.20-k2-NAPI
firmware-version: N/A
bus-info: 0000:03:02.0
root@svr7 [~]# ethtool eth0
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: umbg
        Wake-on: g
        Current message level: 0x00000007 (7)
        Link detected: yes


Dmesg:

e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX
NETDEV WATCHDOG: eth0: transmit timed out
e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX
NETDEV WATCHDOG: eth0: transmit timed out

lspci: 

03:02.0 Ethernet controller: Intel Corporation 82541GI Gigabit Ethernet Controller (rev 05)

Any Idea?

Is it related with APM or ACPI or the network chip is hot?

Adi.