Hi,
EOBC (Ethernet out-of-band channel) is the communications path between then supervisor engine CPU, the MSFC and the line cards - and SCP (serial control protocol) defines the protocol that is used to exchange messages over the EOBC.
An increase in traffic by itself isn't normally a problem unless you're also getting log messages such as SCP comms failure messages, in which case I believe you need to contact the TAC.
HTH - plz rate if it does
Andrew.
