__________________________________________
Ranga Nathan / CSG
Systems Programmer - Specialist; Technical Services;
BAX Global Inc. Irvine-California
Tel: 714-442-7591 Fax: 714-442-2840
Adam Thornton <[EMAIL PROTECTED]>
Sent by: Linux on 390 Port <[EMAIL PROTECTED]>
12/01/2004 05:16 PM
Please respond to Linux on 390 Port
To: [EMAIL PROTECTED]
cc:
Subject: Re: 127 device limitation for hipersockets
On Dec 1, 2004, at 7:09 PM, Ranga Nathan wrote:
> currently we have two hipersockets defined per guest, one with 64k mtu
> block size and one with 8k mtu block size. We use the one smaller mtu
> size
> hipersocket to talk among the other guests from guest to guest and to
> do
> authentication to a USS LDAP server under MVS. The 64k mtu block size
> hipersocket is being used for backups through fdr upstream on the mvs
> side
> and notice a nice improvement on speed for backups. The problem we are
> running into is the 127 device limitation.
> I dont recall this limitation. Is this a Hipersockets limitation? Do
> you
> mean 127 x 4 addresses?
Um, you mean you're using a real Hipersockets dedicated per guest?
Don't do that.
Define them as SPECIALS or with NICDEF and virtualize 'em.
I am losing you. For each Linux guest we had to allocate distinct
addresses and aliased them like so, for hipersockets to work:
'ATT EC08 * EC00 '
'ATT EC09 * EC01 '
'ATT EC0A * EC02 '
'ATT ED08 * ED00 '
'ATT ED09 * ED01 '
'ATT ED0A * ED02 '
Thus for each guest we needed 8 addresses plus 4 for z/VM itself. The
nicdef in DTCPARMS seems to be an appendix. There are big gaps in my
understanding. Help appreciated.
Adam
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