Mailing List os2-wireless_users@2rosenthals.com Archived Message #6669

From:	"Lewis G Rosenthal" <os2-wireless_users@2rosenthals.com>	Full Headers Undecoded message
Subject:	Re: [OS2Wireless] OT - sort of - multiple NICS on same sub net
Date:	Tue, 16 Mar 2010 21:46:41 -0400
To:	OS/2 Wireless Users Mailing List <os2-wireless_users@2rosenthals.com>

Hey, guys... On 03/16/10 04:48 pm, Chuck McKinnis thus wrote : Dave Saville wrote: I thought the above was a no no. I happen to have Ubunto on one of my thinkpads. So far I have not found a way to stop it seeking a wifi connection at boot. It seems to happily get an address from the wired connection *and* another on the same network for the wifi. Anyone? Ubuntu (and Windows XP) on my T61 will happily connect to both connections with 2 different DHCP addresses unless I disable one of them. Indeed, *most* connection management apps are not as smart as XWLAN, and will simply allow everything to connect as it is otherwise configured. For a client system, this shouldn't cause too many issues, although applications running can suffer timeouts if the communication is established via one connection to the LAN (wired) and later, a response is sent back on the other interface. What I've found to be far worse, however, is when configuring NIC bonding and getting a single MAC address to be consistently provided, particularly when configuring for round robin load balancing (both NICs active). This, however, is under non-OS/2 systems; I've never tried to do that under OS/2, although it is likely possible. In your case, Dave, I would probably just disable one connection, perhaps by turning off the radio. I'm not familiar with Ubuntu, but on SUSE there are decent tools to do this (KDE and Gnome, alike). Now, if configuring multiple addresses on a single device on the same subnet, what's important to remember is that you only ever have a single set of default gateways. This is common practice, for example, when running multiple IP-based virtual hosts under Apache, say, for SSL sites (there is a relatively new mechanism which allows for name-based SSL vhosts, but not every browser supports it, and I'm not sure if on OS/2 we have an Apache module for it). Again, this is a horse of a different color; there is but one physical NIC and one MAC address, regardless the number of node addresses assigned to it. More information than you ever wanted, I'm sure. :-) -- Lewis ------------------------------------------------------------- Lewis G Rosenthal, CNA, CLP, CLE Rosenthal & Rosenthal, LLC www.2rosenthals.com Need a managed Wi-Fi hotspot? www.hautspot.com visit my IT blog www.2rosenthals.net/wordpress -------------------------------------------------------------

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