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  3. August 2017

Re: HMC to Rack communcations

You don't have ROOT access to the HMC until IBM tells you the
time-generated password. So I don't think you can change it unless support
wants you to change it. You must have some ADSL or similar encapsulated
links to not be able to use MTU=1412, then again they said that HMC needs
MTU = 1412 OR a network that allows the points to negotiate the MTU thru
ICMP. Have you talked to the network guys about this?
There are reasons to disallow packet fragmentation, it's not something you
ask for unless you need it.
Best of luck!

On Fri, Aug 4, 2017 at 5:34 PM, Kevin Bucknum <Kevin@xxxxxxxxxxxxxxxxxxx>
wrote:

Maybe it's not in your path? /usr/bin/traceroute rack1





Kevin Bucknum
Senior Programmer Analyst
MEDDATA/MEDTRON
Tel: 985-893-2550

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf
Of Rob Berendt
Sent: Friday, August 4, 2017 3:31 PM
To: Midrange Systems Technical Discussion
Subject: RE: HMC to Rack communcations

login as: hscroot
hscroot@hmc02's password:

hscroot@HMC02:~> traceroute rack1
bash: traceroute: command not found


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600
Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: "Kevin Bucknum" <Kevin@xxxxxxxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion"
<midrange-l@xxxxxxxxxxxx>
Date: 08/04/2017 04:29 PM
Subject: RE: HMC to Rack communcations
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Traceroute works, and you should be able to set the mtu with ifconfig,
but I have never tried it.




Kevin Bucknum
Senior Programmer Analyst
MEDDATA/MEDTRON
Tel: 985-893-2550

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On
Behalf
Of Rob Berendt
Sent: Friday, August 4, 2017 3:23 PM
To: Midrange Systems Technical Discussion
Subject: Re: HMC to Rack communcations

Is there a way to lower the MTU size from 1500? I looked here and
do
not
see any such thing.

https://www.ibm.com/support/knowledgecenter/en/POWER8/p8edm/chh
mc.html

Does HMC have a traceroute command?



Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600
Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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