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
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