Set the PMTU

[Sp4admin]

Hello,
I have read some of the threads on this but still I'm not sure. My network team has ask me to set the PMTU to 1460 on a specific IP. I check the MTU in lanadmin and it is set to 1500 for the NIC which is default. I need the correct syntax using route command to achieve this. I also need to know where in the nddconf file I can set this so on reboot the config will stay. When I issue the command below I get a " network not reachable" but I can ping both the IP and the Gateway.

route -p 1460 add host (IP) (gateway)

HPUX 11.23
ia64

Thanks in advance,
sp

[Steven E. Protter]

Shalom,

I believe this network parameter is set by the command ndd

It can be edited in /etc/rc.config.d/nddconf

SEP

[Sp4admin]

Hi Steven,

When I do a man on route it shows a switch "-p" which can set the PMTU. I understand I will need to use the ndd command to make it stick. Also, Will I need to modify the nddconf file? I need the route syntax that I can test it before using the ndd command.

Thanks,
sp

[Jeff_Traigle]

If it's an option on the route command, you need to add it to the appropriate ROUTE_ARGS in /etc/rc.config.d/netconf.

[Sp4admin]

The answer is to first remove the route and then route add using the "-p size" option.

Thanks for the help!
sp,