Will MTU increase affect all parties?











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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









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    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






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      share|improve this question













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      edited Dec 2 at 0:24

























      asked Dec 2 at 0:17









      tarabyte

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          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.






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            1 Answer
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            1 Answer
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            up vote
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            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

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