sorry, couldn't remember the list address for win2k bits....besides, you lot will probably know the answer , well you better had or else I will stamp my feet and cry until you do..ok anyway..a question on network load balancing in a switched environment I want to build two load balanced IIS servers on win2k advanced server. I am trying to understand how NLB works in its two modes Unicast and Multicast. In Uni-cast I think that the cluster host responds with a unique source mac address and in multi-cast the cluster host responds with a multicast address... My confusion is this : In Unicast mode, if the switch sees the source MAC address and then remembers this as the MAC address for that port, presumably all subsequent frames for that MAC address will go out of that specific port only?? in this case, how would all cluster hosts receive the frames?? Brian Lilley Systems Integration m +44 (0)7929 002501 t +44 (0)1249 665421 e brian.lilley@xxxxxxxxxxxxxx ********************************************************************** The information contained in this e-mail message is intended only for the individuals named above. If you are not the intended recipient, you should be aware that any dissemination, distribution, forwarding or other duplication of this communication is strictly prohibited. The views expressed in this e-mail are those of the individual author and not necessarily those of Vivista Limited. Prior to taking any action based upon this e-mail message you should seek appropriate confirmation of its authenticity. If you have received this e-mail in error, please immediately notify the sender by using the e-mail reply facility. ********************************************************************** _____________________________________________________________________ This message has been checked for all known viruses on behalf of Vivista by MessageLabs. http://www.messagelabs.com or Email: mailsweeper.info@xxxxxxxxxxxxx Vivista formerly Securicor Information Systems for further information http://www.vivista.co.uk ******************************************************** This Week's Sponsor: ThinPrint http://www.thinprint.com ********************************************************** Useful Thin Client Computing Links are available at: http://thethin.net/links.cfm For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thethin.net/citrixlist.cfm