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established(Optional) For the TCP protocol only: Indicates an established connection. A match occurs if the TCP datagram has the ACK or RST control bits set. The nonmatching case is that of the initial TCP datagram to form a connection. Transmissi...
Just try add another VLAN to your 3560, and check if all other switches are getting updated. You can delete the vlan later. This addition and deletion usually triggers an update which causes your new switch to join the domain.
