On Friday, 01/24/2003 at 09:55 MST, "Jones, Brian P"
<[EMAIL PROTECTED]> wrote:
> We finally got VLAN working on SLES8...  It's the best thing to come out
> since Logon HERE!

VLANs are an IEEE thing.  Logon Here and Guest LANs (with attendant
virtual NICs) are a VM thing.  But I'm glad you're happy!

> Anyway I am curous as to why I am getting apparent failures out of qeth
yet
> all seems to work ok (haven't tested broadcast).
> Is anyone else seeing these "not supported" messages?
> qeth: Trying to use card with devnos 0x7000/0x7001/0x7002
> qdio : Adapter interruption facility not installed.
> qdio : Not all CHSCs supported. Continuing.
> qeth: Device 0x7000/0x7001/0x7002 is a HiperSockets card with link type
> magic (portname: )
> qeth: VLAN not supported on hsi0
> qeth: multicasting not supported on hsi0
> qeth: IPv6 not supported on hsi0
> qeth: Broadcasting not supported on hsi0
> IP/Netmask: 129.80.45.228 / 255.255.255.224 ..done

HiperSockets (virtual or real) does not support IEEE VLANs, nor does it
support IPv6.  Broadcast was added to virtual HiperSockets in z/VM v4.3,
as were virtual OSA Express (QDIO) adapters.

P.S. VM folk need to be REALLY CAREFUL when talking to Network folk.  If
you tell a network person  "I've got VLANs!", they will be very confused
when you can't answer the follow-up question: "What is your VLAN id?".  (I
can't emphasize this point enough.  Trust me on this.)  Or you will be
confused when they ask you if VM supports VLANs.  (The answer is "If you
mean IEEE VLANs, no, but VM does have a virtualized LAN capability.")

I wish IEEE had used the term "Logical LAN", but "LLAN" isn't so.  For
those who don't know, an IEEE VLAN is a way to overlay multiple logical
LAN segments on a single physical segment.  The switch handles the
segregation.  Some hosts can belong to more than one logical segment using
a single physical ethernet connection.  A broadcast by a member of VLAN 5,
for example, is delivered only to other members of VLAN 5.

Alan Altmark
Sr. Software Engineer
IBM z/VM Development

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