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    Can't connect CentOS 7 to network

    Scheduled Pinned Locked Moved IT Discussion
    linuxcentoscentos 7nmtui
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    • NerdyDadN
      NerdyDad
      last edited by

      It did the first time, but not anymore.

      travisdh1T 1 Reply Last reply Reply Quote 0
      • travisdh1T
        travisdh1 @NerdyDad
        last edited by

        @NerdyDad said in Can't connect CentOS 7 to network:

        It did the first time, but not anymore.

        Can you post the contents of /etc/sysconfig/network-scripts/ifcfg-em1, or whatever file(s) start with ifcfg in that directory other than ifcfg-lo?

        NerdyDadN 1 Reply Last reply Reply Quote 0
        • NerdyDadN
          NerdyDad @travisdh1
          last edited by

          @travisdh1 said in Can't connect CentOS 7 to network:

          @NerdyDad said in Can't connect CentOS 7 to network:

          It did the first time, but not anymore.

          Can you post the contents of /etc/sysconfig/network-scripts/ifcfg-em1, or whatever file(s) start with ifcfg in that directory other than ifcfg-lo?

          Retyping as I see it.

          TYPE=Ethernet
          BOOTPROTO=dhcp
          DEFROUTE=yes
          IPV4_FAILURE_FATAL=yes
          IPV6INIT=yes
          IPV6_AUTOCONF=yes
          IPV6_DEFROUTE=yes
          IPV6_FAILURE_FATAL=no
          NAME=em1
          UUID=(big long number) Do you really need it?
          DEVICE=em1
          ONBOOT=yes
          PEERDNS=yes
          PEERROUTES=yes
          IPV6_PEERDNS=yes
          IPV6_PEERROUTES=yes

          Everything looks right to me, but maybe I'm missing something.

          travisdh1T 1 Reply Last reply Reply Quote 0
          • travisdh1T
            travisdh1 @NerdyDad
            last edited by

            @NerdyDad said in Can't connect CentOS 7 to network:

            @travisdh1 said in Can't connect CentOS 7 to network:

            @NerdyDad said in Can't connect CentOS 7 to network:

            It did the first time, but not anymore.

            Can you post the contents of /etc/sysconfig/network-scripts/ifcfg-em1, or whatever file(s) start with ifcfg in that directory other than ifcfg-lo?

            Retyping as I see it.

            TYPE=Ethernet
            BOOTPROTO=dhcp
            DEFROUTE=yes
            IPV4_FAILURE_FATAL=yes
            IPV6INIT=yes
            IPV6_AUTOCONF=yes
            IPV6_DEFROUTE=yes
            IPV6_FAILURE_FATAL=no
            NAME=em1
            UUID=(big long number) Do you really need it?
            DEVICE=em1
            ONBOOT=yes
            PEERDNS=yes
            PEERROUTES=yes
            IPV6_PEERDNS=yes
            IPV6_PEERROUTES=yes

            Everything looks right to me, but maybe I'm missing something.

            Yeah, ever thing looks good to me in that as well. You're not getting a DHCP address assigned for some reason. You could try changing to a static IP (easier to do with nmtui when available, but since it's not working, here we go.)

            Change the BOOTPROTO to none

            BOOTPROTO=none
            

            and add the following settings with the proper information for your environment.

            IPADDR=xxx.xxx.xxx.xxx
            PREFIX=24
            GATEWAY=xxx.xxx.xxx.xxx
            DNS1=xxx.xxx.xxx.xxx
            DNS2=xxx.xxx.xxx.xxx
            

            Finally, restart the network stack.

            sudo systemctl restart network
            

            Let's see weather that works.

            stacksofplatesS 1 Reply Last reply Reply Quote 0
            • NerdyDadN
              NerdyDad
              last edited by

              I am also not getting any activity lights on the network card. Is this normal in Linux?

              travisdh1T scottalanmillerS 2 Replies Last reply Reply Quote 0
              • travisdh1T
                travisdh1 @NerdyDad
                last edited by

                @NerdyDad said in Can't connect CentOS 7 to network:

                I am also not getting any activity lights on the network card. Is this normal in Linux?

                Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                NerdyDadN 1 Reply Last reply Reply Quote 0
                • NerdyDadN
                  NerdyDad @travisdh1
                  last edited by

                  @travisdh1 said in Can't connect CentOS 7 to network:

                  @NerdyDad said in Can't connect CentOS 7 to network:

                  I am also not getting any activity lights on the network card. Is this normal in Linux?

                  Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                  Possibly a driver issue then?

                  travisdh1T 1 Reply Last reply Reply Quote 0
                  • travisdh1T
                    travisdh1 @NerdyDad
                    last edited by

                    @NerdyDad said in Can't connect CentOS 7 to network:

                    @travisdh1 said in Can't connect CentOS 7 to network:

                    @NerdyDad said in Can't connect CentOS 7 to network:

                    I am also not getting any activity lights on the network card. Is this normal in Linux?

                    Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                    Possibly a driver issue then?

                    While possible, it's unlikely. The only real exceptoin that comes to mind is Debian with certain closed-source Broadcom drivers. What kind of network card is it, and was it working before?

                    NerdyDadN 1 Reply Last reply Reply Quote 0
                    • scottalanmillerS
                      scottalanmiller @NerdyDad
                      last edited by

                      @NerdyDad said in Can't connect CentOS 7 to network:

                      I am also not getting any activity lights on the network card. Is this normal in Linux?

                      Your OS does not change the hardware.

                      NerdyDadN 1 Reply Last reply Reply Quote 1
                      • NerdyDadN
                        NerdyDad @travisdh1
                        last edited by

                        @travisdh1 said in Can't connect CentOS 7 to network:

                        @NerdyDad said in Can't connect CentOS 7 to network:

                        @travisdh1 said in Can't connect CentOS 7 to network:

                        @NerdyDad said in Can't connect CentOS 7 to network:

                        I am also not getting any activity lights on the network card. Is this normal in Linux?

                        Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                        Possibly a driver issue then?

                        While possible, it's unlikely. The only real exceptoin that comes to mind is Debian with certain closed-source Broadcom drivers. What kind of network card is it, and was it working before?

                        It used to work before as it was my first coming to this company. I later switched to a newer laptop and put this one in the back for storage.

                        driver: e1000e
                        version: 3.2.5-k
                        firmware-version: 0.12-1
                        bus-info: 0000:00:19.0
                        supports-statistics: yes
                        supports-test: yes
                        supports-eeprom-access: yes
                        supports-register-dump: yes
                        supports-priv-flags: no

                        travisdh1T 1 Reply Last reply Reply Quote 0
                        • NerdyDadN
                          NerdyDad @scottalanmiller
                          last edited by

                          @scottalanmiller said in Can't connect CentOS 7 to network:

                          @NerdyDad said in Can't connect CentOS 7 to network:

                          I am also not getting any activity lights on the network card. Is this normal in Linux?

                          Your OS does not change the hardware.

                          I get that, but wasn't sure if Linux would handle the hardware differently. Thought it was a nuance of Linux vs. Windows.

                          NerdyDadN 1 Reply Last reply Reply Quote 0
                          • NerdyDadN
                            NerdyDad @NerdyDad
                            last edited by

                            @NerdyDad said in Can't connect CentOS 7 to network:

                            @scottalanmiller said in Can't connect CentOS 7 to network:

                            @NerdyDad said in Can't connect CentOS 7 to network:

                            I am also not getting any activity lights on the network card. Is this normal in Linux?

                            Your OS does not change the hardware.

                            I get that, but wasn't sure if Linux would handle the hardware differently. Thought it was a nuance of Linux vs. Windows.

                            That's like saying that the recent iOS upgrade for your iPhone now made your iPhone water proof. Software doesn't change hardware.

                            scottalanmillerS 1 Reply Last reply Reply Quote 0
                            • scottalanmillerS
                              scottalanmiller @NerdyDad
                              last edited by

                              @NerdyDad said in Can't connect CentOS 7 to network:

                              @NerdyDad said in Can't connect CentOS 7 to network:

                              @scottalanmiller said in Can't connect CentOS 7 to network:

                              @NerdyDad said in Can't connect CentOS 7 to network:

                              I am also not getting any activity lights on the network card. Is this normal in Linux?

                              Your OS does not change the hardware.

                              I get that, but wasn't sure if Linux would handle the hardware differently. Thought it was a nuance of Linux vs. Windows.

                              That's like saying that the recent iOS upgrade for your iPhone now made your iPhone water proof. Software doesn't change hardware.

                              Are you mocking yourself? LMAO

                              1 Reply Last reply Reply Quote 1
                              • travisdh1T
                                travisdh1 @NerdyDad
                                last edited by

                                @NerdyDad said in Can't connect CentOS 7 to network:

                                @travisdh1 said in Can't connect CentOS 7 to network:

                                @NerdyDad said in Can't connect CentOS 7 to network:

                                @travisdh1 said in Can't connect CentOS 7 to network:

                                @NerdyDad said in Can't connect CentOS 7 to network:

                                I am also not getting any activity lights on the network card. Is this normal in Linux?

                                Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                                Possibly a driver issue then?

                                While possible, it's unlikely. The only real exceptoin that comes to mind is Debian with certain closed-source Broadcom drivers. What kind of network card is it, and was it working before?

                                It used to work before as it was my first coming to this company. I later switched to a newer laptop and put this one in the back for storage.

                                driver: e1000e
                                version: 3.2.5-k
                                firmware-version: 0.12-1
                                bus-info: 0000:00:19.0
                                supports-statistics: yes
                                supports-test: yes
                                supports-eeprom-access: yes
                                supports-register-dump: yes
                                supports-priv-flags: no

                                An Intel e1000e should be fine. Any lights showing on the switch port? No lights on either end = no network.

                                NerdyDadN 1 Reply Last reply Reply Quote 0
                                • NerdyDadN
                                  NerdyDad @travisdh1
                                  last edited by

                                  @travisdh1 said in Can't connect CentOS 7 to network:

                                  @NerdyDad said in Can't connect CentOS 7 to network:

                                  @travisdh1 said in Can't connect CentOS 7 to network:

                                  @NerdyDad said in Can't connect CentOS 7 to network:

                                  @travisdh1 said in Can't connect CentOS 7 to network:

                                  @NerdyDad said in Can't connect CentOS 7 to network:

                                  I am also not getting any activity lights on the network card. Is this normal in Linux?

                                  Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                                  Possibly a driver issue then?

                                  While possible, it's unlikely. The only real exceptoin that comes to mind is Debian with certain closed-source Broadcom drivers. What kind of network card is it, and was it working before?

                                  It used to work before as it was my first coming to this company. I later switched to a newer laptop and put this one in the back for storage.

                                  driver: e1000e
                                  version: 3.2.5-k
                                  firmware-version: 0.12-1
                                  bus-info: 0000:00:19.0
                                  supports-statistics: yes
                                  supports-test: yes
                                  supports-eeprom-access: yes
                                  supports-register-dump: yes
                                  supports-priv-flags: no

                                  An Intel e1000e should be fine. Any lights showing on the switch port? No lights on either end = no network.

                                  No lights.

                                  travisdh1T 1 Reply Last reply Reply Quote 0
                                  • travisdh1T
                                    travisdh1 @NerdyDad
                                    last edited by

                                    @NerdyDad said in Can't connect CentOS 7 to network:

                                    @travisdh1 said in Can't connect CentOS 7 to network:

                                    @NerdyDad said in Can't connect CentOS 7 to network:

                                    @travisdh1 said in Can't connect CentOS 7 to network:

                                    @NerdyDad said in Can't connect CentOS 7 to network:

                                    @travisdh1 said in Can't connect CentOS 7 to network:

                                    @NerdyDad said in Can't connect CentOS 7 to network:

                                    I am also not getting any activity lights on the network card. Is this normal in Linux?

                                    Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                                    Possibly a driver issue then?

                                    While possible, it's unlikely. The only real exceptoin that comes to mind is Debian with certain closed-source Broadcom drivers. What kind of network card is it, and was it working before?

                                    It used to work before as it was my first coming to this company. I later switched to a newer laptop and put this one in the back for storage.

                                    driver: e1000e
                                    version: 3.2.5-k
                                    firmware-version: 0.12-1
                                    bus-info: 0000:00:19.0
                                    supports-statistics: yes
                                    supports-test: yes
                                    supports-eeprom-access: yes
                                    supports-register-dump: yes
                                    supports-priv-flags: no

                                    An Intel e1000e should be fine. Any lights showing on the switch port? No lights on either end = no network.

                                    No lights.

                                    Well, we know where the problem is now, but I doubt you'll be able to change the network card in a laptop 😞

                                    NerdyDadN 1 Reply Last reply Reply Quote 0
                                    • NerdyDadN
                                      NerdyDad @travisdh1
                                      last edited by

                                      @travisdh1 said in Can't connect CentOS 7 to network:

                                      @NerdyDad said in Can't connect CentOS 7 to network:

                                      @travisdh1 said in Can't connect CentOS 7 to network:

                                      @NerdyDad said in Can't connect CentOS 7 to network:

                                      @travisdh1 said in Can't connect CentOS 7 to network:

                                      @NerdyDad said in Can't connect CentOS 7 to network:

                                      @travisdh1 said in Can't connect CentOS 7 to network:

                                      @NerdyDad said in Can't connect CentOS 7 to network:

                                      I am also not getting any activity lights on the network card. Is this normal in Linux?

                                      Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                                      Possibly a driver issue then?

                                      While possible, it's unlikely. The only real exceptoin that comes to mind is Debian with certain closed-source Broadcom drivers. What kind of network card is it, and was it working before?

                                      It used to work before as it was my first coming to this company. I later switched to a newer laptop and put this one in the back for storage.

                                      driver: e1000e
                                      version: 3.2.5-k
                                      firmware-version: 0.12-1
                                      bus-info: 0000:00:19.0
                                      supports-statistics: yes
                                      supports-test: yes
                                      supports-eeprom-access: yes
                                      supports-register-dump: yes
                                      supports-priv-flags: no

                                      An Intel e1000e should be fine. Any lights showing on the switch port? No lights on either end = no network.

                                      No lights.

                                      Well, we know where the problem is now, but I doubt you'll be able to change the network card in a laptop 😞

                                      Well crap. I guess I'll use this for a study machine to learn with. I have a few more laptops here that I haven't installed CentOS on yet. I'll test their cards before I install CentOS.

                                      wirestyle22W 1 Reply Last reply Reply Quote 1
                                      • scottalanmillerS
                                        scottalanmiller
                                        last edited by

                                        Why CentOS on laptops in the first place? That's the least laptop friendly Linux OS I can think of.

                                        NerdyDadN 1 Reply Last reply Reply Quote 2
                                        • wirestyle22W
                                          wirestyle22 @NerdyDad
                                          last edited by wirestyle22

                                          @NerdyDad said in Can't connect CentOS 7 to network:

                                          @travisdh1 said in Can't connect CentOS 7 to network:

                                          @NerdyDad said in Can't connect CentOS 7 to network:

                                          @travisdh1 said in Can't connect CentOS 7 to network:

                                          @NerdyDad said in Can't connect CentOS 7 to network:

                                          @travisdh1 said in Can't connect CentOS 7 to network:

                                          @NerdyDad said in Can't connect CentOS 7 to network:

                                          @travisdh1 said in Can't connect CentOS 7 to network:

                                          @NerdyDad said in Can't connect CentOS 7 to network:

                                          I am also not getting any activity lights on the network card. Is this normal in Linux?

                                          Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

                                          Possibly a driver issue then?

                                          While possible, it's unlikely. The only real exceptoin that comes to mind is Debian with certain closed-source Broadcom drivers. What kind of network card is it, and was it working before?

                                          It used to work before as it was my first coming to this company. I later switched to a newer laptop and put this one in the back for storage.

                                          driver: e1000e
                                          version: 3.2.5-k
                                          firmware-version: 0.12-1
                                          bus-info: 0000:00:19.0
                                          supports-statistics: yes
                                          supports-test: yes
                                          supports-eeprom-access: yes
                                          supports-register-dump: yes
                                          supports-priv-flags: no

                                          An Intel e1000e should be fine. Any lights showing on the switch port? No lights on either end = no network.

                                          No lights.

                                          Well, we know where the problem is now, but I doubt you'll be able to change the network card in a laptop 😞

                                          Well crap. I guess I'll use this for a study machine to learn with. I have a few more laptops here that I haven't installed CentOS on yet. I'll test their cards before I install CentOS.

                                          You would see the NIC light up regardless FYI. It only requires about 2 AMPS of power to light up or something.

                                          1 Reply Last reply Reply Quote 2
                                          • NerdyDadN
                                            NerdyDad @scottalanmiller
                                            last edited by

                                            @scottalanmiller said in Can't connect CentOS 7 to network:

                                            Why CentOS on laptops in the first place? That's the least laptop friendly Linux OS I can think of.

                                            I am wanting to build out a network for my house with as minimal cost as possible while also being secure. This laptop I was wanting to use for NextCloud while having another laptop for ldap and another for PLEX.

                                            I know that you're going to suggest putting it on a server with XenServer and run each installation as a VM. I have Dell PowerEdge 1950 that I could use, but I don't want to draw that much power and the thing is too noisy to have in the house. It gets too hot for it in the garage.

                                            Have any suggestions? Maybe I could use a Dell Optiplex 380 desktop for either XS or bare-metal CentOS?

                                            travisdh1T 1 Reply Last reply Reply Quote 0
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