Re: Output on raw sockets ignores IP_DF when packet is bigger than pmtu

[Sridhar Samudrala <sri@xxxxxxxxxx>]

On Thu, 6 Mar 2003, Raghurama 'REDDY' wrote:

> Is there a way to get the host to not fragment when IP_DF is set,
> iresspective what the pmtu is?

You can disable pmtu discovery on a socket using the IP level socket option 
IP_MTU_DISCOVER.

System wide pmtu discovery can be disabled by setting 
        /proc/sys/net/ipv4/ip_no_pmtu_disc

-Sridhar