Will MTU increase affect all parties?











up vote
0
down vote

favorite












Will a Maximum Transfer Unit (MTU) increase for the ethernet interface on one device, box-a pictured below, in a LAN network also increase the MTU between each of the clients and box-a?



enter image description here



Put another way, is this setting least- or most-common-denominator? How can I prove the setting took effect other than looking at an updated value output with ifconfig eth1?



I hope to be able to build a test network and validate, but it will take some some to acquire hardware.



On box-a:



ip a list eth1
ip link set mtu 1400 dev eth1
ip a list eth1









share|improve this question




























    up vote
    0
    down vote

    favorite












    Will a Maximum Transfer Unit (MTU) increase for the ethernet interface on one device, box-a pictured below, in a LAN network also increase the MTU between each of the clients and box-a?



    enter image description here



    Put another way, is this setting least- or most-common-denominator? How can I prove the setting took effect other than looking at an updated value output with ifconfig eth1?



    I hope to be able to build a test network and validate, but it will take some some to acquire hardware.



    On box-a:



    ip a list eth1
    ip link set mtu 1400 dev eth1
    ip a list eth1









    share|improve this question


























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Will a Maximum Transfer Unit (MTU) increase for the ethernet interface on one device, box-a pictured below, in a LAN network also increase the MTU between each of the clients and box-a?



      enter image description here



      Put another way, is this setting least- or most-common-denominator? How can I prove the setting took effect other than looking at an updated value output with ifconfig eth1?



      I hope to be able to build a test network and validate, but it will take some some to acquire hardware.



      On box-a:



      ip a list eth1
      ip link set mtu 1400 dev eth1
      ip a list eth1









      share|improve this question















      Will a Maximum Transfer Unit (MTU) increase for the ethernet interface on one device, box-a pictured below, in a LAN network also increase the MTU between each of the clients and box-a?



      enter image description here



      Put another way, is this setting least- or most-common-denominator? How can I prove the setting took effect other than looking at an updated value output with ifconfig eth1?



      I hope to be able to build a test network and validate, but it will take some some to acquire hardware.



      On box-a:



      ip a list eth1
      ip link set mtu 1400 dev eth1
      ip a list eth1






      linux networking ethernet mtu






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Dec 2 at 0:24

























      asked Dec 2 at 0:17









      tarabyte

      4971128




      4971128






















          1 Answer
          1






          active

          oldest

          votes

















          up vote
          0
          down vote



          accepted










          No, it will not automatically increase MTU of the other devices, they should just communicate with the smaller MTU. But it can lead to problems, with devices which cant handle it.
          I am as example had problems with DHCP over APs on a network, where the DHCP Server was the one with the increased MTU.






          share|improve this answer





















            Your Answer








            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "3"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            convertImagesToLinks: true,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: 10,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });














            draft saved

            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f1380070%2fwill-mtu-increase-affect-all-parties%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            0
            down vote



            accepted










            No, it will not automatically increase MTU of the other devices, they should just communicate with the smaller MTU. But it can lead to problems, with devices which cant handle it.
            I am as example had problems with DHCP over APs on a network, where the DHCP Server was the one with the increased MTU.






            share|improve this answer

























              up vote
              0
              down vote



              accepted










              No, it will not automatically increase MTU of the other devices, they should just communicate with the smaller MTU. But it can lead to problems, with devices which cant handle it.
              I am as example had problems with DHCP over APs on a network, where the DHCP Server was the one with the increased MTU.






              share|improve this answer























                up vote
                0
                down vote



                accepted







                up vote
                0
                down vote



                accepted






                No, it will not automatically increase MTU of the other devices, they should just communicate with the smaller MTU. But it can lead to problems, with devices which cant handle it.
                I am as example had problems with DHCP over APs on a network, where the DHCP Server was the one with the increased MTU.






                share|improve this answer












                No, it will not automatically increase MTU of the other devices, they should just communicate with the smaller MTU. But it can lead to problems, with devices which cant handle it.
                I am as example had problems with DHCP over APs on a network, where the DHCP Server was the one with the increased MTU.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Dec 2 at 1:02









                Thomas

                212




                212






























                    draft saved

                    draft discarded




















































                    Thanks for contributing an answer to Super User!


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.





                    Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


                    Please pay close attention to the following guidance:


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.




                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f1380070%2fwill-mtu-increase-affect-all-parties%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    Popular posts from this blog

                    "Incorrect syntax near the keyword 'ON'. (on update cascade, on delete cascade,)

                    Alcedinidae

                    Origin of the phrase “under your belt”?