Interpretting pfsense interface info - is it half-duplex?



  • I've searched the forums without any success in answering my question - how do you know if an interface is half duplex?  In my case, I am interested in fxp0.

    When I look at Status > Interfaces for fxp0, I see "Media 10baseT/UTP".  No indication if it is full duplex or half duplex.

    When I SSH into pfsense and run ifconfig, I see "media: Ethernet autoselect (10baseT/UTP)" .  When I run ifconfig -m fxp0, I see:
    media: Ethernet autoselect (10baseT/UTP)
    status: active
    supported media:
    media autoselect
    media 100baseTX mediaopt full-duplex
    media 100baseTX
    media 10baseT/UTP mediaopt full-duplex
    media 10baseT/UTP
    media none
    media 100baseTX mediaopt hw-loopback

    Thanks in advance,
    Yakup



  • Yakup,

    It would appear not.

    Here is the output for my WAN:

    –------

    ifconfig -m re0

    re0: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
            options=389b <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_ucast,wol_mcast,wol_magic>capabilities=38db <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,polling,vlan_hwcsum,wol_ucast,wol_mcast,wol_magic>ether 00:30:18:a5:a1:cb
            inet6 fe80::230:18ff:fea5:a1cb%re0 prefixlen 64 scopeid 0x1
            media: Ethernet autoselect (100baseTX <full-duplex>)</full-duplex>
            status: active
            supported media:
                    media autoselect
                    media 1000baseTX mediaopt full-duplex
                    media 1000baseTX
                    media 100baseTX mediaopt full-duplex
                    media 100baseTX
                    media 10baseT/UTP mediaopt full-duplex
                    media 10baseT/UTP
                    media none

    –------

    Scott</rxcsum,txcsum,vlan_mtu,vlan_hwtagging,polling,vlan_hwcsum,wol_ucast,wol_mcast,wol_magic></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_ucast,wol_mcast,wol_magic></up,broadcast,running,simplex,multicast>



  • Thanks Scott.  I have about 30 pfsense boxes installed, and just as in your case, when an interface is 100 full-duplex, interface status shows this.  However, on some interfaces, I also see "Media 10baseT/UTP" without any indication of whether its full or half.  So my question really is, does "Media 10baseT/UTP" mean full or half duplex?  What does the absence of a duplex indication mean?

    Yakup


  • Rebel Alliance Developer Netgate

    It says full duplex if it's full duplex - if it's not printed, it's half.



  • Thanks, jimp.  That's what I thought but wanted to be sure.

    Yakup


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