Support for up to 1056 ports of 1Gbps and 352 ports of 10Gbps systems deployed with VSS , so i need to know how the supervisor engine 2t will get the speed 11.4 terabits per second?
No. Sup2T can support up to 220 Gbps per slot speed.
6807 can support up to 880 Gbps per slot speed.
The next supervisor card to supersede the Sup2T can support up to 440 Gbps. Another supervisor card (rumoured to be released in 2018) can fully exploit the 6807 backplane speed of 880 Gbps.