interesting. The following may or may not be feasible, depending upon space in closets, and cost of implementation. It is something my employer is supposed to be doing for the various "branch offices" of a major customer we have during a major network forklift upgrade. It has tended not to happen this way for a lot of reasons, political and practical.
1) Place all new switches into the various closets. Connect them up 2) set up a gateway ( single link ) between the new core switch(s) and the old core switch(s) 3) test connectivity by taking a laptop with as many user applications as practical, and go from closet to closet testing connectivity to the various servers, services, etc. 4) assuming point three results in connectivity everywhere, do a closet by closet migration of users from the old switches to the new switches. 5) migrate all devices ( servers, internet, etc ) onto the new core switches. 6) assuming all remains well, unplug the old stuff and if Cisco is not offering you a generous trade in, sell it on one of the auction sites. Like I said, sometimes time, space, and cost does not permit this. Chuck -- www.chuckslongroad.info like my web site? take the survey! ""Azhar Teza"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > What is the best way to perform Migration? I have a customer who has > currently running CAT5000 as a backbone switch and tons of 3COM switches at > access layer. We would be installing (2) 6509 switches with 3524 switches > will be used at access layers and server farms. It is a campus environments > and they have tons of IDFs. We will have about 15 VLANS will be load > balancing between (2) 6509 switches along with HSRP for Layer 3 redundancy. > During the First phase, I want to configure (2) 6509 along with the > Serverfarm switches. The way I would migrate is that I will connect their > Existing backbone Cat 5000 with (2) 6509 switches, and will also force to > Cat5000 to become non-root switch. By doing that I could slowly move users > from their current network to the new switches and both the newtworks will > have an access to the servers which will be on its own subnet in (5) 3524 > gigastack switches. The only problem I see it here is these 15 VLANS. I > guess I will also have to configure their existing subnets and VLANS to the > 6509 switches only temporarily basis because those VLANS and Subnets coming > from 3com switches to new 6509 via Cat5000, and in order to reply back, > 6509 will have to know the routes and vlans. Is it right approach or someone > have a better suggestion? Regards, Teza > > ------------------------------------------------ > Changed your e-mail? Keep your contacts! Use this free e-mail change of > address service from Return Path. Register now! Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55077&t=55064 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
