On Thursday, 10/21/2004 at 04:17 AST, GWillis <[EMAIL PROTECTED]> wrote:

> I am having a spot of trouble configuring virtual hipersockets. I have
it
> working to the extent that I can communicate between z/VM 4.3.0 and
Debian
> Linux s390 (kernel 2.4.19)  however, I cannot communicate between Linux,
and
> the outside network. I'm hoping someone can point me in the right
direction
> to fix this.
[snip]
> ifconfig
> ZVMETH0  inet addr: 10.1.1.90 mask: 255.255.0.0
> UP BROADCAST MULTICAST MTU: 1500
> vdev: 0E00 rdev: 0E00 type: QDIO ETHERNET portname: ETH0
> router type: NONROUTER
>
> HIPERLA0 inet addr: 10.8.1.95 P-t-P: 10.8.1.93 mask: 255.255.255.255
> UP MULTICAST POINTOPOINT MTU: 1500
> vdev: 0FA0 type: HIPERS
> LAN owner: TCPIP name: NERAC1

1) HIPERLA0 is a LAN, not a point-to-point connection.  While this p2p
route will work ok for the first Linux guest, you'll get in trouble when
you add another.  Define an entire subnet to for use on the virtual
hipersocket LAN.

2)  The symptom you describe usually indicates that the external routers
do not know to route 10.8.1.93 to 10.1.1.90.  So, packets find their way
out into the network just fine, but they can't find their way back again.

Alan Altmark
Sr. Software Engineer
IBM z/VM Development

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