Junos OS

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

Hi ,

Did you tried below option?

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

Regards,

Rahul

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;
}
}

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

<<This article has been archived and the link is no longer valid. The link was removed on June 23, 2025.>> 

Regards,
Rahul N

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;
}