Re: HMC to Rack communcations -- MIDRANGE-L

Firewall yes, more likely a routing problem with the network.

Rob: Do make sure the cables are plugged in where you expect them to be. More than once I've had customers tell me they plugged into #1 Ethernet (ETH0 on the HMC) only to find out they really put it into #3 (Eth2) since the layout of the ports on the back of the newer HMCs are not always intuitive, and of course they don't read the label.

--
Jim Oberholtzer
Agile Technology Architects

On 8/1/2017 8:50 AM, Tsvetan Marinov wrote:

Hi,

It looks like a firewall issue, can you check the following requirements in
the document:
http://www-01.ibm.com/support/docview.wss?uid=nas8N1019111

You can try to remove the server from connections and try to add it again,
sometimes it takes a while in order for the HMC to discover the server. Be
sure that you know the HMC access password for the server.

The following ports should be opened:
Nets (HMC-FSP SSL communications) 30000,30001 (private/intranet) Managed
Server HMC connection.

На вт, 1.08.2017 г. в 14:42 Rob Berendt <rob@xxxxxxxxx> написа:

I have an HMC in one city with one Power 8.
I have another HMC in another city with two other Power 8's.

Until recently both HMC's could see all three Power 8's. Granted, we only
kept the 5250 consoles active on the each systems local hmc.

Recent change.
In preparation for a data center move we changed RACK2 and HMC02 from
10.10.6.x to 10.27.6.x
That seemed to work. However HMC02 can no longer see RACK1 & RACK3.
Status is "No Connection". Reference code is: Connecting
0002-0004-0000003C
I did see an archive with this same reference code but that quickly
devolved into a discussion of whether or not to put your HMC-to-FSP
connection on a private vs public lan.

I've tried the "reset connection" from the HMC.
I've tried removing and readding the connection.
I've tried rebooting the HMC
IBM called since this is apparently a "call home" situation and worked
with me for a few hours. After they royally screwed it up we got back to
this situation. They had me send in some pedbg information and I'm
waiting for them to mull that over.

I went into ASMI, Network Services, Network Access and there are no
entries in "Allowed IP addresses" nor "Denied IP addresses" which should
allow all addresses.

HMC Management, Test Network Connectivity, successfully pings the racks
which will not communicate.
IDK of any ports which need to be open for this to work. IDK if our
network guy has any ports locked down.

IBM sent me this document:

https://www.ibm.com/support/knowledgecenter/en/POWER5/ipha5_p5/managedsystemstate_no_connect.htm
I told them we are at the step "If restarting the HMC does not resolve the
problem, contact your next level of support or your hardware service
provider.". That's when he requested the pedbg information.
...yesterday...

There was a similar discussion at developer works but I think the guy
there discovered he was using the same IP address for his FSP as he was
for his AIX lpar.

https://www.ibm.com/developerworks/community/forums/html/topic?id=77777777-0000-0000-0000-000014703171

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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