/Net/cernvax/userd/tbl/denise/ChangeCost.html

# Changing a DECnet circuit cost

Circuit costs are the mechanism DECnet uses for routing. An incorrect setting for a circuit cost can have a drastic affect on worldwide DECnet traffic. Changes to circuit costs require the agreement of the CERN DECnet coordinator (CS Group). If an urgent request is received in her absence, then the cost can be changed using the commands below. However, the request must come from or be agreed to by the relevant European HEP DECnet Manager. A list of the managers and their contact details is given in a later section. The example below changes the cost of the circuit x25-spain on cernr1 to the value 23.

Invoke NCP on any DECnet node and type:

    	NCP> set exec node cernr1 user xxx pass yyy
    	NCP> set circ x25-spain state off
    	NCP> set circ x25-spain cost 23
    	NCP> set circ x25-spain state on
    	NCP> exit

The above commands only change the circuit cost in the volatile data base of the router itself so the changes will be lost next time the router reboots. Normally it will be sufficient to inform the DECnet coordinator so that she can update the permanent data base on her return. If you need the permanent data base updated before her return then follow the instructions in the section below.