LPAR missing virtual interface Post: 303027826

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Operating Systems AIX LPAR missing virtual interface Post 303027826 by bakunin on Tuesday 25th of December 2018 04:22:26 PM

12-25-2018

Registered User

Quote:

Originally Posted by max

Note: Newbie to IBM virtualization :-)
Query: Created a new AIX7.1 lpar on a system with same config as one before however the new one is having issues going out to physical network.

There are such a number of possible causes to this that we will need to narrow it down a bit first. Here is how (in general) AIX virtualisation in respect to networks work:

You have one (if you have IVM, two if you have a HMC) VIOS servers in each hardware box. "VIOS" means "virtual I/O server") and these are LPARs running a special version of AIX (called "IOS") used to virtualise hardware which can't easily be virtualised otherwise, i.e. network cards. That means: you have VIOS servers which have the physical network card(s) assigned as ressources. In the VIOS you create a virtual network card which is based on some physical connection (a quite common setup is to have Etherchannels consisting of several physical network cards bonded and base the virtual adapter on that) and this virtrual card is given to the LPAR as a resource. The VIOS acts as a bridge with an internal VLAN system so that it can redirect cleanly the traffic to/from the various LPARs it serves.

So, first question: did you create a new virtual adapter in the VIOS when you created the new LPAR?

Second: you need to configure the VLANs for inside and outside the phyiscal system where the LPAR is based on correctly for the network connection to work. If you need help with this you will need to tell us a bit more about your network, its VLANs and the configuration of the NIC in the VIOS as shown in the HMC/IVM.

I hope this helps.

bakunin

bakunin

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LEARN ABOUT OPENSOLARIS

systemd-networkd

SYSTEMD-NETWORKD.SERVICE(8)				     systemd-networkd.service				       SYSTEMD-NETWORKD.SERVICE(8)

NAME

       systemd-networkd.service, systemd-networkd - Network manager

SYNOPSIS

       systemd-networkd.service

       /lib/systemd/systemd-networkd

DESCRIPTION

       systemd-networkd is a system service that manages networks. It detects and configures network devices as they appear, as well as creating
       virtual network devices.

       To configure low-level link settings independently of networks, see systemd.link(5).

       systemd-networkd will create network devices based on the configuration in systemd.netdev(5) files, respecting the [Match] sections in
       those files.

       systemd-networkd will manage network addresses and routes for any link for which it finds a .network file with an appropriate [Match]
       section, see systemd.network(5). For those links, it will flush existing network addresses and routes when bringing up the device. Any
       links not matched by one of the .network files will be ignored. It is also possible to explicitly tell systemd-networkd to ignore a link by
       using Unmanaged=yes option, see systemd.network(5).

       When systemd-networkd exits, it generally leaves existing network devices and configuration intact. This makes it possible to transition
       from the initrams and to restart the service without breaking connectivity. This also means that when configuration is updated and
       systemd-networkd is restarted, netdev interfaces for which configuration was removed will not be dropped, and may need to be cleaned up
       manually.

CONFIGURATION FILES

       The configuration files are read from the files located in the system network directory /lib/systemd/network, the volatile runtime network
       directory /run/systemd/network and the local administration network directory /etc/systemd/network.

       Networks are configured in .network files, see systemd.network(5), and virtual network devices are configured in .netdev files, see
       systemd.netdev(5).

SEE ALSO

       systemd(1), systemd.link(5), systemd.network(5), systemd.netdev(5), systemd-networkd-wait-online.service(8)

systemd 237													       SYSTEMD-NETWORKD.SERVICE(8)