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ljardenFlag for Australia

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Need help connecting 2 x 6248 switches with stacking cables and 2x 10GEthernet cables

I have 2 x 6248 switches currentley connected and manageable via a single interface (using the stacking modules/cables in bay1 of each switch)  I also have added a 10GE SFP+Module and cables in bay 2 of both switches.  My question is what configuration do I need to add/adjust to have both switches utilizing the 10GE modules so I can get 10GE between the swtiches instead of 1g ethernet with the stacking cables.
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Thanks Giltjr,

You are right on the speeds almost 12gb not 10
Below is what dell have sent me after I logged a support call.  Thanks for taking the time to post an answer

Hi Luke,

Please refer to the information below as this should answer most of your questions

PowerConnect 6200 series switches, which includes the PC6224, PC6248, PC6224P, PC6248P, and PC6224F Dell part numbers. Each PowerConnect switch has two bays that can be customized to support a stacking or an uplink configuration. Bay 1 can contain a stacking, CX-4 or SFP+ module. Bay 2 can contain a CX-4, SFP+, or 10GBase-T module. Stacking is supported only on CX-4 or stacking modules in either bay and must be enabled by the operator. The switch supports mixing CX-4 and stacking modules together in a stack. Whether using a stacking module or a CX-4 module configured for stacking, the maximum cable length that can be used for stacking is 3 meters.

Stacking and Management
An important advantage of stacking is that it provides a consolidated interface for management of multiple switches when linked together. When a stack is already deployed in the network, operators can add units to the stack as their port requirements increase, with minimal administrative overhead required for reconfiguration. Additional stack members can immediately utilize existing configuration information such as routing and switching configurations, VLANs, ACLs, port profiles, and security certificates.

Stacking and Performance
For situations where there is a need to pass traffic between switches and the aggregate bandwidth required between PowerConnect 6200 Series switches does not exceed 48 Gbps (2 ports, 12 Gbps Tx and Rx each), a stacking configuration offers an attractive alternative to Link Aggregation Groups (LAGs). Stacking configuration is generally transparent to the operator and does not require configuration beyond cabling. In addition, failover times are generally faster in a stack configuration. Stacking operates over CX-4 or stacking modules in either bay. Note that other PowerConnect Series switches may have different supported bandwidths for stacking.
Thanks for the points and their answer clearfies something for me.  I had no clue how they got 48 Gbps of stacking speed if the stack ports were limited to 10 Gbps, but I can see tech specs are off and their speed is 12 Gbps.

If you are having performance problems with 12 Gbps stack speed, about the only way you are going to get faster is to move away from stacking and get a chassie based switch.  They offer much faster speeds, but are a bit more expensive.