MTU speed on 9.05

[Brian W Herriman]

Does anyone know if there is a way to change the MTU speed on an hp-ux 9.05 system with an ether card?

[Tim D Fulford]

I have not played on 9.05 systems for a very long time...

The MTU; as far as networking & cards are concerned; is the Maximum Transport Unit & is default at 1500 Bytes. It ha NOTHING to do with LAN card speed. It can be changed but you will no longer be using the same standard (803.??). Alternatively the LAN speed can be changed. Both of these can be changed from SAM or lanadmin.

regards

Tim

[Brian W Herriman]

There is no lanadmin on 9.05. It's landiag and it doen not allow you to change the maximum transmission units. Also sam does not allow this.

[Ron Kinner]

In the current release, the route command allows you to specify the MTU. Don't know if worked that way back in 9.05.

Ron

[Tim D Fulford]

OK

Like I said 9.05 is a long time ago for me. So if SAM & landiag dont do the trick, then I would guess at the /etc/rc.config.d/xxx configs you may be able to define the MTU/LAN speed.

Regards

Tim

[rick jones]

It is indeed a dimm memory, but back in the timeframe of 9.05, the only links supported were 10 Megabit Ethernet, 802.5 TokenRing, FDDI and perhaps ATM.

There was no support for 100BT nor for Gigabit.

The 10 Megabit interfaces were "driven" by either the lan2 or lan3 drivers and their corresponding NICs were 10 megabit half-duplex, 1500 byte MTU only.

I don't think we allowed shanging the MTU on the FDDI interface, and I _think_ that in 9.05 timeframes we may have only supported classic IP over ATM which had a fixed MTU of something like 9000 bytes.

So, Ithink the suggestion to see if the route command on 9.05 has the -p option to set the Path MTU is about the only way to go, short of upgrading the OS to something from the late 1990's or early 2000's.