Re: LAN Console Line Description

On 10/05/2020 4:40 PM, Brad Stone wrote:

Quick question.

I wanted to change the maximum frame size using CHGLINETH but it looks like
you need to vary off the line description (E1) to make the change.

My question.. if I use LAN console does that use the same line description
and will it just kill that job as well leaving me needing to IPL to bring
it back up?

I guess if so, I don't see an easy way to make this change without a real
console connected lol!
LAN console is connected to a different port on the back of the Power 8.
I know it's good as I use it to IPL, apply PTFs, etc.

LAN console doesn't use line descriptions -- you configure which CMN resource it uses (e.g. CMNxx). If you have a line description configured for that same resource, LAN console will share usage with the system line description and normal TCP/IP stack. If you vary off the line description, the LAN console TCP/IP stack will take over, but there will be a brief interruption of your console as varying off the line description will deactivate that comm adapter, and then LAN console stack will automatically reactivate it. Once that completes, LAN console can continue to run. You may or may not lose your console session -- it depends on whether the client side reaches TCP/IP retry limits before the line is reactivated. If you do lose you session, you should be able to reconnect. When you vary the line back on, the same thing will happen -- the LAN console stack will disable the adapter to allow the line to be activated with the line description configuration.

Note that the LAN console stack will not use jumbo frames if you enable them by increasing the line description's maximum frame size.

Brian