You could give maccahnger a go also. ftp://ftp.gnu.org/gnu/macchanger/macchanger-1.5.0.tar.gz
Scott On Fri, 25 Mar 2005, David Boyes wrote: > > I don't know any thing about VM and very little about IP. > > However I can > > share one OSA card with multiple LPARS each with its own IP > > address and > > possibly a VIPA address. All IP addresses are in the same > > network, and all > > have the same physical MAC address of the OSA card. > > Yeah. There's a lot of seriously unusual magic going on to make that > work -- this part is one of the hardest things for network weenies to > grasp: that there can be more than one system with the same physical MAC > *iff* there is a separation of layer 2 MAC frame processing from layer 3 > IP processing, and a single entity (your OSA) controls the mapping > between layer 2 and layer 3 address mappings in a consistent way. > > ARP and MAC addresses are layer 2 things -- below the IP layer (at layer > 3). At layer 2, the MAC address IS unique -- there's only one physical > card with that MAC attached within the collision domain. > > In the shared environment you mention, the OSA is acting as a "layer > 2.75" device -- it's aware of some layer 3 addressing, but is not a full > layer 3 router. The OSA ucode is handling mapping the single layer 2 MAC > to multiple layer 3 addresses (which is why the stacks behind the OSA > don't do ARP processing, because to make all this work, the card has to > do it to keep all the ducks lined up while sharing a single physical > MAC). > > If you load the layer 2 microcode, or you're dealing with combinations > of internal and external systems on VLANs, then you have to have unique > MACs, because that OSA ucode mapping magic is no longer active for that > conenction -- you gotta play with the real world scenario, where > everything has to have a unique MAC. > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > sleekfreak pirate broadcast http://sleekfreak.ath.cx:81/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
