Feature #11989

Updated by Joshua M. Clulow over 2 years ago

"RFC 2132": RFC 2132 describes a DHCP option for setting the Interface MTU to something other than the default of 1500: 

 5.1. Interface MTU Option 

    This option specifies the MTU to use on this interface.    The MTU is 
    specified as a 16-bit unsigned integer.    The minimum legal value for 
    the MTU is 68. 

    The code for this option is 26, and its length is 2. 

     Code     Len        MTU 
    |    26 |    2    |    m1 |    m2 | 

 We should provide support for using this option.    In particular, the Google Compute Engine (GCE) hypervisor environment requires the guest to use an MTU of 1460 bytes, and will tell the guest to do this via DHCP.