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Interface speed autonegotation getting downsized

lki

Hi *

I have a software based Sophos Firewal with 4 Interfaces. This month I changed from DSL to Fibre which allows me to speed up my browsing ;-)

Changing WAN connection was not a big deal, but my interface - lying on Port2 - has some trouble by properly autonegotiating the speed of the interface!
Once I set this to auto the connection is at 1 Gbps speed, after a while the speed is redefined to 100 Mbps. Sure i can set this to static 1 Gbps but I really love to keep it running with autonegotiation at full speed!

Is there any way to troubleshoot this behaviour by monitoring logs?


The setup with DSL had a direct LAN connection to my modem. Since my fibre converter is not located near firewall any longer, I have to connect Port2 interface from the firewall to the fibre convert LAN interface through CAT-cable connection. Sophos Firewall: Best practices tells me that is recommended to use switch and not crossover cable. This may be the issue here.

Thanks in advance for your support!



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  • 0

    HiI,

    what model is the wan interface Nic?
    ian

    XG115W - v19.5.1 mr-1 - Home

    If a post solves your question please use the 'Verify Answer' button.

  • 0 in reply to rfcat_vk

    Hi Ian,

    it is Intel I211AT

  • 0

    forgot to mention: FW is 18.5.3

  • 0 in reply to lki

    The Nic should be able to negotiate and maintain a 1 gb connection, maybe the cable is faulty?
    ian

    XG115W - v19.5.1 mr-1 - Home

    If a post solves your question please use the 'Verify Answer' button.

  • 0 in reply to rfcat_vk

    I will switch LAN-cable this evening, if issue persist there could be an issue with the CAT-cable. In this case I may set a static interface speed ;-)

  • 0

    I found the article i read before Where is logging for interface negotiation history? - Discussions - Sophos Firewall - Sophos Community

    syslog gave me hints about negotiation and Port2 getting Down and Up without reason for me?

    Apr 17 20:35:38 localhost kernel: [131350.964490] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Down
Apr 17 20:35:42 localhost kernel: [131354.577096] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
Apr 17 20:35:47 localhost kernel: [131359.704492] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Down
Apr 17 20:35:50 localhost kernel: [131362.673095] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
Apr 17 20:35:50 localhost kernel: [131363.128493] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Down
Apr 17 20:36:07 localhost kernel: [131380.173101] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Up 100 Mbps Full Duplex, Flow Control: None
Apr 19 13:37:44 localhost kernel: [279141.591294] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
Apr 19 13:37:53 localhost kernel: [279150.810706] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Down
Apr 19 13:37:57 localhost kernel: [279154.435300] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
Apr 19 13:55:02 localhost kernel: [280181.271055] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
Apr 19 13:59:31 localhost kernel: [280449.718475] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Down
Apr 19 13:59:35 localhost kernel: [280453.707079] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
Apr 19 14:00:39 localhost kernel: [280518.066482] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Down
Apr 19 14:00:50 localhost kernel: [280528.831084] igb_nm 0000:02:00.0 Port2: igb: Port2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None

       

  • +1

    monitored the behaviour over the past week, negotiation is stable now but I didn't do any change.

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