Messages in this thread | | | Date | Thu, 5 Jan 2006 21:29:54 +0100 (CET) | From | Lukasz Trabinski <> | Subject | e1000_watchdog_task: NIC Link is Up/Down on kernels 2.4.15 2.4.14 |
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Hello
I have machine with build in ethernet interafce, system is Linux Fedora Core 4. Ethernet controller: Intel Corporation 82541GI/PI Gigabit Ethernet Controller. It's connected to cisco Catalyst 4000 switch:
#show interface GigabitEthernet3/5
GigabitEthernet3/5 is up, line protocol is up (connected) Hardware is Gigabit Ethernet Port, address is xxx Description: xxx MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 1000Mb/s, link type is auto, media type is 10/100/1000-TX input flow-control is off, output flow-control is off
configuration on switch interface:
interface GigabitEthernet3/5 switchport mode access switchport nonegotiate logging event link-status no cdp enable end
on linux machine:
[root@w3cache ~]# 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: 1000Mb/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
Some times I observe flaping eth0 interface:
Jan 5 18:31:19 w3cache kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Down Jan 5 18:31:21 w3cache kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full Duplex Jan 5 18:31:25 w3cache kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Down Jan 5 18:31:27 w3cache kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full Duplex Jan 5 18:56:30 w3cache kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Down Jan 5 18:56:33 w3cache kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full Duplex
Patchcords and other physical layer is OK. Tested kernels kernel-2.6.14-1.1653_FC4 and latest vanilla 2.4.15. I have tried set full duplex, speed 1000 on switch but it's happan again. On cisco switch i don't have seen any flaps this interface or any errors.
Any idea? Thank You.
I have also commited this problem to redhat bugzilla: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=177043
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