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    Slow connection with CAT6

    Scheduled Pinned Locked Moved General pfSense Questions
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    • K Offline
      kipTry
      last edited by

      Hi,

      Yesterday, I changed a CAT5e for a CAT6. I don't know why, but my connection now is stuck at 100mbps (with cat5e is 300mbps). So, instead of use my laptop, I did a test with another laptop and I got the 300mbps. In this moment I was thinking the problem is with my laptop, then I put cat 5e again in my laptop and the connection was 100mbps!. I reset pfsense and I have again 300mb wit CAT5e. So maybe the problem is with pfsense?.

      I know… I don't need a CAT6 cable, but I want to know what is going on!
      Thanks

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      • D Offline
        divsys
        last edited by

        My first instinct would be that there's something not right with that Cat6 cable.

        Where did you get it, do you have access to another one from a different source?

        On another note, Cat6 cabling gets you absolutely nothing unless all components in the cabling chain are rated for Cat6.

        Even then, unless you are trying to get into a 10GB LAN environment, you're not likely to see any performance improvements.

        -jfp

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        • K Offline
          kipTry
          last edited by

          I know, I can use CAT5e cable and problem solved ;)

          But I want to know what is the problem because the CAT6 is working perfectly with other laptop!. And the weird thing is when I do this sequence: cat5e, cat6, cat5e. In this moment a I get 100mbps with cat5e! and I have to reset the pfsense for get 300mbps again.

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          • johnpozJ Offline
            johnpoz LAYER 8 Global Moderator
            last edited by

            huh?  300mbps cat5e is more than cable of gig. That standard for gig is 5e will work.  I run it all over the place without any issues for gig.  Are you doing some speed test where you got that 300mbps number from vs what your interfaces are showing for connections.

            If your connected at 100 there is no way would actually see 100, it would be say mid to high 90s at best.  You can never actually see wire speed..

            So how exactly are you doing the testing or finding these numbers.

            If the cable passes specs then cat6 should be showing you what speed your connected at.  you can view the speed of pfsense connections with ifconfig or in the gui.

            example
            em1: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
                    options=9b <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum>ether 00:50:56:00:00:02
                    inet6 fe80::250:56ff:fe00:2%em1 prefixlen 64 scopeid 0x2
                    inet 192.168.9.253 netmask 0xffffff00 broadcast 192.168.9.255
                    inet6 2001:snipped::1 prefixlen 64
                    nd6 options=21 <performnud,auto_linklocal>media: Ethernet autoselect (1000baseT <full-duplex>)</full-duplex>

            In windows you can look at status of your interface

            speed.png
            speed.png_thumb
            status.png
            status.png_thumb</performnud,auto_linklocal></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum></up,broadcast,running,simplex,multicast>

            An intelligent man is sometimes forced to be drunk to spend time with his fools
            If you get confused: Listen to the Music Play
            Please don't Chat/PM me for help, unless mod related
            SG-4860 24.11 | Lab VMs 2.8, 24.11

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            • M Offline
              muswellhillbilly
              last edited by

              If you have a managed switch, what speed/duplex is the port that the pfSense is plugged into set at? Some devices will default to the lowest common speed by default if the device and the port are both set to autonegotiate.

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              • K Offline
                kipTry
                last edited by

                Ok, ifconfig with CAT5e:
                igb1: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
                        options=400bb <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,jumbo_mtu,vlan_hwcsum,vlan_hwtso>media: Ethernet autoselect (1000baseT <full-duplex>)
                        status: active

                Now, I change CAT5E for CAT6:     
                CAT6
                igb1: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
                        options=400bb <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,jumbo_mtu,vlan_hwcsum,vlan_hwtso>media: Ethernet autoselect (100baseTX <full-duplex>)
                        status: active

                So, that is the problem. If I force 1000baseTX with:
                ifconfig igb1 192.168.2.1 media 1000baseTX mediaopt full-duplex

                I get "status: no carrier" :(

                It is problem of my laptop, I'm going to update drivers and so on and buy a cat5e cable hahah.

                Thanks!</full-duplex></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,jumbo_mtu,vlan_hwcsum,vlan_hwtso></up,broadcast,running,simplex,multicast></full-duplex></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,jumbo_mtu,vlan_hwcsum,vlan_hwtso></up,broadcast,running,simplex,multicast>

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                • N Offline
                  NOYB
                  last edited by

                  Read up on auto detection protocols for 10/100/1000.  There are some differences in how the determines the speed based on pair connections etc.  I remember reading a little about it a while back but not enough to explain.

                  On second thought it may have been PoE I was reading about.

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                  • johnpozJ Offline
                    johnpoz LAYER 8 Global Moderator
                    last edited by

                    If your cable doesn't auto come up gig then you should never force it and expect it to work that is for sure!!

                    Throw the cable out if its not coming up gig.. Do you have a cable tester?  Do you know anyone that has a cable tester..  Cables are pretty cheap, I would just throw it out and get new one from good source.  I like deepsurplus or monoprice never had any issues with their very reasonable priced cables.

                    An intelligent man is sometimes forced to be drunk to spend time with his fools
                    If you get confused: Listen to the Music Play
                    Please don't Chat/PM me for help, unless mod related
                    SG-4860 24.11 | Lab VMs 2.8, 24.11

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                    • K Offline
                      kipTry
                      last edited by

                      I did a test with a Live Usb with Linux and the same, so maybe the cable has some issue…

                      I don't have a cable tester, so I'm going to buy a new one as you told. Anyway this situation is curious.

                      Thnaks guys!

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                      • N Offline
                        NOYB
                        last edited by

                        I like to build my own cables.  A little tedious to put the connectors on, but if there is a problem, just cut off the connector and try again.

                        If you don't have some place local to buy crimper, bulk cable and connectors.  Have a look at: http://www.pchcables.com/

                        That's where I buy from.

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                        • KOMK Offline
                          KOM
                          last edited by

                          Back in the day I used to make my own cables, but it's such a hassle now and cables are cheap.  You forgot the cable tester in your list.  Making your own without a tester is setting you up to chase ghosts in the wire.

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                          • johnpozJ Offline
                            johnpoz LAYER 8 Global Moderator
                            last edited by

                            yeah a cable tester is good tool for the belt for anyone that deals with cabling be it you make your own or buy predone, etc.

                            Simple testers can be as cheap as <$50 for sure.. Now if you want a fancy specification validation tool you can get into the 1000's so kind of out of the realm of home user diyer ;)

                            The cheap ones won't point out issues in quality of the cable but will real quick tell you if wiring is wrong, shorts/opens, etc.  So nice tool to check a cable before you put it into use, etc.  And that you crimped them correctly, etc.

                            An intelligent man is sometimes forced to be drunk to spend time with his fools
                            If you get confused: Listen to the Music Play
                            Please don't Chat/PM me for help, unless mod related
                            SG-4860 24.11 | Lab VMs 2.8, 24.11

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