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MX how to change GRE IP MTU &IP TCP adjust-mss?

  • 1.  MX how to change GRE IP MTU &IP TCP adjust-mss?

    Posted 02-08-2018 07:03

    how to set in junper mx 480

    show interfaces gr-4/0/0
    unit 0 {
    tunnel {
    source 210.56.48.2;
    destination 210.5.0.1;
    }
    family inet {
    address 10.4.4.1/30;
    }
    }

     

    ----------------------------------------

    Cisco GRE tunnel port setting

    interface Tunnel1100

     ip address 10.4.4.2 255.255.255.252

     ip mtu 1460

     ip tcp adjust-mss 1420

     tunnel source 210.5.0.1

     tunnel destination 210.56.48.2



  • 2.  RE: MX how to change GRE IP MTU &IP TCP adjust-mss?

     
    Posted 02-08-2018 07:45

    Hi ,

     

    Did you tried below option?

     

    TEST# show interfaces gr-4/0/0
    unit 0 {
        family inet {
            mtu 1400;
            tcp-mss 600;
        }
    }

     

    Regards,

    Rahul



  • 3.  RE: MX how to change GRE IP MTU &IP TCP adjust-mss?

    Posted 02-09-2018 23:15

    the forllowing conf. can't work , in the server also need to change MTU 

     

    unit 1 {
    description "GRE";
    tunnel {
    source 112.213.***.***;
    destination 5.254.**.**;
    }
    family inet {
    mtu 1460;
    tcp-mss 1420;
    address 192.168.56.2/30;
    }
    }



  • 4.  RE: MX how to change GRE IP MTU &IP TCP adjust-mss?

     
    Posted 02-09-2018 23:46

    Hi Kenchan,

     

    Thread was open for the commands. Can you confirm the issue?

     

    You can also read the following if issue is related to fragmentation.

     

    https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/allow-fragmentation-edit-interfaces.html

    https://kb.juniper.net/InfoCenter/index?page=content&id=KB12393

     

    Regards,
    Rahul N



  • 5.  RE: MX how to change GRE IP MTU &IP TCP adjust-mss?

    Posted 02-10-2018 01:29

    Now change the conf.  but don't work

     

    show interfaces gr-4/0/0 unit 1
    clear-dont-fragment-bit;
    tunnel {
    source 112.213.**.**;
    destination 5.254.**.**;
    allow-fragmentation;
    }
    family inet {
    mtu 9192;
    address 192.168.56.2/30;
    }