You can also use -switched command to display all RDF groups on the local Symmetrix array and its remotely connected Symmetrix arrays.RDF groups are listed as static or dynamic under the group type.
symcfg list -ra all -switched
It doesn't matter if you put -v flag or not, -v will give you a more detailed outcome, so if you don't include it your command will also work, the only difference if that only a summary if gonna be shown to you. What I told you before applies to mostly symcli commands, I mean, you always have the choice to include -v flag or not, depends on specific case.
I hope it helps