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The Catalyst 6500 line starting in IOS version 12.2(33)SXI, Cisco added IPv6 features to all IOS versions, including IPBASE and IP Services. The Catalyst 6500, with its large amount of hardware forwarding resources, is very well suited for demanding IPv4 + IPv6 environments, especially when deployed with a Sup720-3BXL or VS-S720-10G-3CXL. However, the still-popular Sup2 does not support IPv6 in hardware, making it completely unsuitable for an IPv6 deployment.


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