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

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vni

vni(7d) 							      Devices								   vni(7d)

NAME

       vni - STREAMS virtual network interface driver

DESCRIPTION

       The  vni  pseudo  device  is  a	multi-threaded, loadable, clonable, STREAMS pseudo-device supporting the connectionless Data Link Provider
       Interface dlpi(7P) Style 2. Note that DLPI is intended to interact with IP, meaning that DLPI access to applications is not supported. (For
       example, snoop fails on the vni interface.)

       The  vni  device is a software-only interface and does not send or receive data. The device provides a DLPI upper interface that identifies
       itself to IP with a private media type. It can be configured via ifconfig(1M) and can have IP addresses assigned to it, making aliases pos-
       sible.

       The  vni  pseudo  device  is  particularly  useful in hosting an IP address when used in conjunction with the 'usesrc' ifconfig option (see
       ifconfig(1M) for examples).  The logical instances of the device can also be used to host addresses as an alternative to hosting them  over
       the loopback interface.

       Multicast  is not supported on this device. More specifically, the following options return an error when used with an address specified on
       vni: IP_MULTICAST_IF, IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP, IPV6_MULTICAST_IF, IPV6_JOIN_GROUP, IPV6_LEAVE_GROUP. In  addition,  broadcast
       is not supported.

       Because	there  is no physical hardware configured below it, no traffic can be received through nor transmitted on a virtual interface. All
       packet transmission and reception is accomplished with existing physical interfaces and tunnels. Because applications that deal with packet
       transmission  and  reception  (such  as packet filters) cannot filter traffic on virtual interfaces, you cannot set up a packet filter on a
       virtual interface. Instead, you should configure the policy rules to apply to the physical interfaces and tunnels, and  if  necessary,  use
       the virtual IP addresses themselves as part of the rule configuration. Also, note that the virtual interface cannot be part of an IP multi-
       pathing (IPMP) group.

FILES

       /dev/vni

	   64-bit ELF kernel driver

SEE ALSO

       ifconfig(1M), in.mpathd(1M), ip(7P), ip6(7P)

SunOS 5.10							   18 July 2004 							   vni(7d)