Global Search in P2P configuration is only allowed, if both, index receive and distribution is switched on. You have a P2P configuration, but are not allowed to search other peers.
#(/commitDHTNoGlobalSearch)#
#(commitRobinson)#::
For Robinson Mode, index distribution and receive is switched off.
This Robinson Mode switches remote indexing on, but limits targets to peers within the same cluster. Remote indexing requests from peers within the same cluster are accepted.