Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    After some hours Internet/LAN slow, LAN Interface ping 3500ms, reboot solves

    Scheduled Pinned Locked Moved General pfSense Questions
    13 Posts 4 Posters 2.2k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • K
      kallegr
      last edited by

      Hello,
      i´ve got a pfsense 2.02 2.1.2 installation which was running fine for about 10 month. since 2-3 weeks the device completely slows down. the gui is slow, pinging the internal lan-interface takes about 3500ms.

      System log shows nothing special. cpu, memory usage is fine, no high load, status of interfaces shows no collisions, no errors. but nearly every day internet usage is very slow (after some hours). i tried to restart service by service, but only a restart solved the issue for some hours.

      if i use ping from pfsense gui:
      pinging to a lan device, or lan-address about 3000ms, pinging to wan (router) about is fine (1ms). so something in the lan network might be the reason?!?

      i also changed the NIC. Do you have any ideas, what to check?

      thank you, kind regards, kallegr

      1 Reply Last reply Reply Quote 0
      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        what connects pfsense to network..  Switch I would assume.  So if you enable and disable the lan nic on pfsense does this fix the issue.  When you say restart fixes the issue are you just restarting pfsense or also the switch on your lan network?

        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

        1 Reply Last reply Reply Quote 0
        • K
          kallegr
          last edited by

          @johnpoz:

          what connects pfsense to network..  Switch I would assume.  So if you enable and disable the lan nic on pfsense does this fix the issue.  When you say restart fixes the issue are you just restarting pfsense or also the switch on your lan network?

          hmm, shame on me: i haven't tested enabling and disabling lan nic if the problem occurs.

          i just restart pfsense and the problem is gone (for some hours).

          1 Reply Last reply Reply Quote 0
          • KOMK
            KOM
            last edited by

            What happens if you ping LAN client to client, since that doesn't go through pfSense at all?  Is it still slow or not?  The only sure way to find out why a network is slow is to capture some packets and then analyze them in Wireshark.

            1 Reply Last reply Reply Quote 0
            • K
              kallegr
              last edited by

              @KOM:

              What happens if you ping LAN client to client, since that doesn't go through pfSense at all?  Is it still slow or not?  The only sure way to find out why a network is slow is to capture some packets and then analyze them in Wireshark.

              pinging other computers inside the local lan network is fine. ok, next time i will try to capture some packets. but i'm not good in analyzing with wireshark, may i post it here?

              1 Reply Last reply Reply Quote 0
              • KOMK
                KOM
                last edited by

                I don't know if a packet capture would be useful in this situation where the general LAN is fine.  Slow GUI can also be related to DNS issues, believe it or not.  Any reason you're still on an old build? 2.0.2 is 2.5 years old now and full of bugs and security vulns as compared to the latest releases.

                1 Reply Last reply Reply Quote 0
                • K
                  kallegr
                  last edited by

                  @KOM:

                  I don't know if a packet capture would be useful in this situation where the general LAN is fine.  Slow GUI can also be related to DNS issues, believe it or not.  Any reason you're still on an old build? 2.0.2 is 2.5 years old now and full of bugs and security vulns as compared to the latest releases.

                  oh, sorry. it is 2.1.2 installation - i've corrected my first post.

                  could a dns problem result to ping times of 3500ms on LAN interface? because ping from pfsense gui to wan-gateway (router) is still fine.

                  1 Reply Last reply Reply Quote 0
                  • KOMK
                    KOM
                    last edited by

                    could a dns problem result to ping times of 3500ms on LAN interface?

                    I have not experienced that whereas I have seen the slow GUI - DNS issue first-hand.

                    oh, sorry. it is 2.1.2 installation

                    OK, so I will reiterate… why such an old build?  2.1.2 is 1.5 years old now.  The reason I ask is that I find it can often be a big waste of time trying to debug a problem in an older version.  You need to keep pfSense up to date.

                    1 Reply Last reply Reply Quote 0
                    • K
                      kallegr
                      last edited by

                      OK, so I will reiterate… why such an old build?  2.1.2 is 1.5 years old now.  The reason I ask is that I find it can often be a big waste of time trying to debug a problem in an older version.  You need to keep pfSense up to date.

                      ok, i have to update! ;-) it is a bit complicated, because i use pfsense with some other third-party changes (captive portal addons). afaik the third-party addons are not compatible/not tested with 2.2 builds yet. but the software is running on about more than 50 installations with the same hardware and same pfsense version (2.1.2) - no issues until yet.

                      1 Reply Last reply Reply Quote 0
                      • K
                        kallegr
                        last edited by

                        i found one questionable entry in systemlogs…

                        (re4 is the LAN interface)

                        kernel: re4: discard frame w/o leading ethernet header (len 4294967292 pkt len 4294967292)

                        i don´t know if this has something to do with the problem... any ideas?

                        Update:
                        a bit of googling shows me user with a similar problem:
                        http://freebsd.1045724.n5.nabble.com/Problem-with-nfe-stability-and-throughput-td3905429.html

                        but i only have one error in systemlogs..

                        maybe the "nic driver" has a problem with higher network load?

                        1 Reply Last reply Reply Quote 0
                        • KOMK
                          KOM
                          last edited by

                          Did the slowness happen just after that error was logged?  If there is only the one instance then I would not think that's the root of your problem.

                          1 Reply Last reply Reply Quote 0
                          • K
                            kallegr
                            last edited by

                            @KOM:

                            Did the slowness happen just after that error was logged?  If there is only the one instance then I would not think that's the root of your problem.

                            i´m not really sure, if this is the exact starting point of the slowness. someone called me, that internet is slow. i checked the logs and found this entry in systemlog.. maybe it was slow some minutes earlier or later…
                            yes, only one instance of this message is logged.

                            1 Reply Last reply Reply Quote 0
                            • H
                              Harvy66
                              last edited by

                              kernel: re4: discard frame w/o leading ethernet header (len 4294967292 pkt len 4294967292)

                              4GB Ethernet packet. Increased the bar for "jumbo" frames.

                              1 Reply Last reply Reply Quote 0
                              • First post
                                Last post
                              Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.