Though we do have certain line cards which support dual EOBC channel, the SX code does not support this feature. The dual EOBC channel cannot be enabled even if the hardware supports it as there is no software which supports this at the moment.
EOBC is a bus, located on the chassis and every line card has a connection to this bus. one can also say it as, the communication channel between the Supervisor and the Linecards, Dual EOBC channel is to have a redundancy in place when one of the EOBC channel jams. Please note in 6500 EOBC is a half-duplex medium,
On Nexus 7K platforms - EOBC there is a full duplex one to one connection between the line card and the supervisor. So if there is a problem with one module jamming EOBC - it will not affect other modules
Unfortunately due to the complexity involved in mix of dual/single EOBC channel capable LC's in 6500, there is no plans of adding this dual channel feature in the 6500.
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