Re: Using VSWITCH and OSA

2004-12-16 Thread Mark Perry
] Subject: Re: Using VSWITCH and OSA Plus, if you have two network interfaces on each guest, that doubles the amount of real storage that gets used (and _fixed_) by the network driver. The number of pages that get fixed is configurable, but then that's just one more thing to have to do for each

Re: Using VSWITCH and OSA

2004-12-16 Thread Mark Post
To: [EMAIL PROTECTED] Subject: Re: Using VSWITCH and OSA When you run something like SAP under Linux, a little bit more storage for the network driver isn't an issue :-) All the Best Mark Perry -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Mark Post

Re: Using VSWITCH and OSA

2004-12-15 Thread Tracy J Bolinda
Hi, Tobias, While I don't know the answer to your question, let me take a stab at what I think you maybe asking. The failover for the VSWITCH if the OSA connection goes down is handled by the VSWITCH and specifically the TCPIP Controller. So whether or not the two OSAs communication with BPDU

Re: Using VSWITCH and OSA

2004-12-15 Thread Alan Altmark
On Wednesday, 12/15/2004 at 10:09 GMT, Tobias Doerkes [EMAIL PROTECTED] wrote: Question : I want to connect 2 OSA to my VSWITCH. Do the 2 OSA communicate via any LAYER-2 protocol (e.g. BPDU)? No, they do not communicate. There is no load balancing or link aggregation, either. When the

Re: Using VSWITCH and OSA

2004-12-15 Thread Wiggins, Mark
[EMAIL PROTECTED] wrote: -- note -- This means that your backup ports can be in use on other guests, or on other VSWITCHes. -- note -- My question to this is, in the following scenario (which are some query commands on our v5.1 system), how can OSA 0A00 be used elsewhere if it needs to be

Re: Using VSWITCH and OSA

2004-12-15 Thread Alan Altmark
On Wednesday, 12/15/2004 at 11:05 EST, Wiggins, Mark [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: -- note -- This means that your backup ports can be in use on other guests, or on other VSWITCHes. -- note -- My question to this is, in the following scenario (which are some query

Re: Using VSWITCH and OSA

2004-12-15 Thread Michael MacIsaac
The single VSWITCH solution requires that both OSA's are in the same subnet, right? And hence the same gateway? Yes Must be some more limitations I can think of (Multipath workload balancing I already mentioned) I can't think of any, but I'll defer to the networking gurus on the list. Mike

Re: Using VSWITCH and OSA

2004-12-15 Thread Mark Perry
Hi Tobias, This is not an answer exactly more of a question. If you have two OSA cards why would you want to use VSWITCH High Availability rather than a full network High Availability solution? What I mean is why not use two VSWITCHes each connected to its own OSA in a standard manner, and

Re: Using VSWITCH and OSA

2004-12-15 Thread Michael MacIsaac
If you have two OSA cards why would you want to use VSWITCH High Availability rather than a full network High Availability solution? Because it's a *lot* easier to configure? Mike MacIsaac [EMAIL PROTECTED] (845) 433-7061 --

Re: Using VSWITCH and OSA

2004-12-15 Thread Mark Perry
-Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Michael MacIsaac Sent: 15 December 2004 18:02 To: [EMAIL PROTECTED] Subject: Re: Using VSWITCH and OSA If you have two OSA cards why would you want to use VSWITCH High Availability rather than a full

Re: Using VSWITCH and OSA

2004-12-15 Thread Richard Troth
VSWITCH looks a lot (to me) like bridged ethernet in VMware. Seems worthwhile to draw accurate comparisons for the sake of understanding one or the other or both. This would make a good topic for FreeVM-L. -- R; -- For

Re: Using VSWITCH and OSA

2004-12-15 Thread Mark Post
Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Michael MacIsaac Sent: Wednesday, December 15, 2004 12:02 PM To: [EMAIL PROTECTED] Subject: Re: Using VSWITCH and OSA If you have two OSA cards why would you want to use VSWITCH High Availability rather than a full network High