: Cisco 2600 Series (optimally 2611XM, 2621XM, or 2651XM). Version : 12.4(25)d (Mainline release).
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: Advanced traffic shaping and policing mechanisms to prioritize critical data like voice or video. Hardware Requirements and Compatibility : Cisco 2600 Series (optimally 2611XM, 2621XM, or 2651XM)
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