Axel,Originally posted in cdnusers.org by adbeckett
You should be able to use patch from basic (or Add->Patchcord in the schematic editor) to alias nets. The patch component can alias both single (scalar) nets and bus/bundle (vector) nets. The one thing you can't do is to alias two different terminals, two different global nets, or a terminal to a global net. For that, you can use the "cds_thru" component in basic. cds_thru ends up as something equivalent to a short in all the things it gets netlisted to - so for Verilog, it's a true through connection (because you can do that in Verilog); for spectre it's an "iprobe" (effectively a zero-volt source); for hspice it's a zero-volt source; for VirtuosoXL it will get shorted by VXL because it has lxRemoveDevice on it; for CDL it ends up as a small resistor (which generally can be shorted by the physical verification tool); and for Diva it ends up as a component that can be removed using removeDevice() in your LVS rules.
That said, you should only use cds_thru for cases where patch can't be used. patch is a direct alias in the database, so that's better than introducing a real component in circuit simulators, say.