AIX LPAR FC connection to SAN Post: 303031453

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Operating Systems AIX AIX LPAR FC connection to SAN Post 303031453 by bakunin on Thursday 28th of February 2019 12:48:49 PM

02-28-2019

Registered User

Quote:

Originally Posted by Phat

In some lpars, I can see they are using virtual fiber channel to connect to DS8K storage. In search with google, I understand that it is configured with VIOS server to share the physical FC channel with NPIV method.

But the situation is, in the same managed system, there are other lpars have physical FC, the WWpN not starting with C.
So my concern is, what method these lpars use to connect to SAN? How can they can "share/use" the physical FC without VIOS virtual FC?

I am not sure if i understand your question correctly. If the folowing answer is not what you expected please clarify what exactly you want to know:

Basically they both use the same way of communicating with the SAN - a "sort-of SCSI"-protocol transported over FC. NPIV basically means that a single (physical) FC port can use several (virtual) IDs - WWPNs - to identify itself. Think of it like an IP-alias for a network interface.

You may want to replace the physical FC-adapters with virtual ones, even if you only configure one LPAR to use it: if you assign physical adapters to an LPAR this partition will never be eligible for LPM (live partition mobility) and hence also not for live update (replace even the kernel without reboot, possible since AIX 7.2). My suggestion is to assign all the physical adapters to the VIOSes and give only virtual adapters to the LPARs. Notice that you will need to change the zoning for this to work.

Every virtual FC adapter (port) has actually TWO WWPNs which should both be zoned. The reason is that for LPM you need one WWPN to hold the connection on the originating side while the other WWPN is configured on the side you migrate to during the transition.

I hope this helps.

bakunin

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LEARN ABOUT SUSE

ipsec_tncfg

IPSEC_TNCFG(8)                                                    [FIXME: manual]                                                   IPSEC_TNCFG(8)

NAME

       ipsec_tncfg - manipulate KLIPS virtual interfaces

SYNOPSIS

       ipsec tncfg
             ipsec tncfg --create virtual
             ipsec tncfg --delete virtual
             ipsec tncfg --attach --virtual virtual --physical physical
             ipsec tncfg --detach --virtual virtual
             ipsec tncfg --clear
             ipsec tncfg --version
             ipsec tncfg --help

OBSOLETE

       Note that tncfg is only supported on the classic KLIPS stack. It is not supported on any other stack and will be completely removed in
       future versions. A replacement command still needs to be designed

DESCRIPTION

       The historical use of tncfg is to attach/detach IPsec virtual interfaces (e.g. ipsec0) to/from physical interfaces (e.g. eth0) through
       which packets will be forwarded once processed by KLIPS.

       The modern use of tncfg is to create and delete virtual interfaces known as mastXXX. mast stands for Mooring and XXX.

       The form with no additional arguments lists the contents of /proc/net/ipsec_tncfg. The format of /proc/net/ipsec_tncfg is discussed in
       ipsec_tncfg(5).

       The --attach form attaches the virtual interface to the physical one.

       The --detach form detaches the virtual interface from whichever physical interface it is attached to.

       The --clear form clears all the virtual interfaces from whichever physical interfaces they were attached to.

       Virtual interfaces typically have names like ipsec0 or mast0 while physical interfaces typically have names like eth0 or ppp0.

EXAMPLES

       ipsec tncfg --create mast12
           creates the mast12 device.

       ipsec tncfg --create ipsec4
           creates an ipsec4 device, but does not attach it.

       ipsec tncfg --attach --virtual ipsec0 --physical eth0
           attaches the ipsec0 virtual device to the eth0 physical device.

FILES

       /proc/net/ipsec_tncfg, /usr/local/bin/ipsec

SEE ALSO

       ipsec(8), ipsec_manual(8), ipsec_eroute(8), ipsec_spi(8), ipsec_spigrp(8), ipsec_klipsdebug(8), ipsec_tncfg(5)

HISTORY

       Written for the Linux FreeS/WAN project <http://www.freeswan.org/> by Richard Guy Briggs.

[FIXME: source]                                                     10/06/2010                                                      IPSEC_TNCFG(8)

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