Moving VIOS, LPAR's, HMC to different subnet Post: 302892780

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Operating Systems AIX Moving VIOS, LPAR's, HMC to different subnet Post 302892780 by spricer on Friday 14th of March 2014 01:21:56 PM

03-14-2014

Registered User

Maybe I don't understand network settings completely:
In HMC's network settings currently there are two adapters with next :
-eth0 (assuming direct connection to FSP) , Private, Autodetection, enabled DHCP server (192.168.128.2-192.168.255.254), greyed out settings for IPv4 (192.168.128.1)
-eth1 (assuming management port), Open, Autodetection, DHCP disabled, IPv4 192.168.1.121, 255.255.255.0.
Routing settings: Default Gateway 192.168.1.1 for eth1
No tagging involved.
VIOS and LPAR;s are on same subnet as eth1.

Now I figured that default gateway has to be the same one that of VIOS and LPAR's are using in order for HMC to connect to them via console.
You are right that IP settings for eth1 does not matter but than I can not reach remotely HMC unless I change route, which in turn makes problem for HMC accessing LPAR's via console.
Now I tried attaching cable to eth2 and connecting it to new subnet, added static NET route 192.168.1.0, 192.168.50.1, 255.255.255.0 for eth2 and everything works fine (192.168.50.1 is new subnet gateway). I can remotely access HMC and still HMC can access LPAR's via console.
So my question now is if you missconfigure IP settings on VIOS how can I access missconfigured system or better question how you can access VIOS that does not have network interface? e.g. in KVM I do not care about network settings at all as long as I have physical access to hypervisor (I can access guests via console).
Thanks

spricer

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pbuilder-uml.conf

pbuilder-uml.conf(5)						     pbuilder						      pbuilder-uml.conf(5)

NAME

       pbuilder-uml.conf - configuration file for user-mode-linux port of pbuilder

DESCRIPTION

       /etc/pbuilder/pbuilder-uml.conf contains default values used in pbuilder-user-mode-linux program invocation.

FORMAT

       MY_ETH0=tuntap,,,192.168.0.2
	      Configures ethernet setting used for booting linux.  See how rootstrap boots your system, and copy that.

	      Specify --eth0=slirp,12345,/usr/bin/slirp-fullbolt to use the slirp connection.

       UML_IP=192.168.0.3
	      IP address to use for guest OS.

	      This can be set to dhcp for obtaining IP address through DHCP.

       UML_NETMASK=255.255.255.0
	      Guest OS netmask

       UML_NETWORK=192.168.0.0
	      Guest OS network

       UML_BROADCAST=255.255.255.255
	      Guest OS broadcast

       UML_GATEWAY=192.168.0.1
	      Guest OS gateway

       PBUILDER_UML_IMAGE=${HOME}/uml-image
	      Guest OS file system image.

       UML_MOUNT_TMPFS=no
	      Whether to mount tmpfs inside the guest image.  This is probably mostly useless.

       BUILDPLACE=${HOME}/tmp/
	      The  location  which build will take place.  pbuilder-user-mode-linux will place temporary COW files to there.  The user running UML
	      needs to be able to access that directory.

       UML_MEM=128
	      The amount of memory allowed for UML.  Give more value to here.

       UML_HOSTNAME=uml-host
	      The hostname for the UML.

	      The hostname should be available in /etc/hosts so that hostname -f will be able to return the FQDN.

       UML_BUILDRESULT=/directory/of/build/result
	      The directory where build result of pbuilder-user-mode-linux is stored.

       ROOTSTRAP_IMAGESIZE=size-in-megabytes
	      The size, in MB, of the disk iamge to create. Defaults to 1000.

NOTES

       It is advised to set APTCACHEHARDLINK to no in ~/.pbuilderrc.  see pbuilderrc(5) for details.

AUTHOR

       Initial coding, and main maintenance is done by Junichi Uekawa <dancer@debian.org>.

       The homepage is available at http://pbuilder.alioth.debian.org

FILES

       /etc/pbuilder/pbuilder-uml.conf, ${HOME}/.pbuilderrc

SEE ALSO

       /usr/share/doc/pbuilder/pbuilder-doc.html, pbuilder-user-mode-linux(1), pbuilder(8), pbuilderrc(5), pdebuild(1)

Debian								    2003 Jan 8						      pbuilder-uml.conf(5)