avahi-resolve works but mdns

I have an updated Debian 11 (bullseye) setup and want to use avahi to connect to locally connected computers. avahi works, for example: avahi-resolve -n4 prag11mono.local gives prag11mono.local 10.0.0.105 which is correct. However, ping (or ssh) for the same host ping prag11mono.local PING prag11mono.local.rpz.GS.local (127.0.0.2) 56(84) bytes of data. 64 bytes from 127.0.0.2 (127.0.0.2): icmp_seq=1 ttl=64 time=0.035 ms Here I do not understand where the rpz.GS.local addition comes from. It is not added to ssh prag11mono.local, but the request goes to 127.0.0.2 as well. In /etc/nsswitch.conf I have hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4 but getent hosts bhutan.local returns nothing. I have no /etc/mdns.allow file. The connection between avahi-daeomon and mdns4 is puzzling. I can restart avahi-daemon with systemctl; But how do I restart mdns? I fear that I am missing some installation. I tried to install the package nss-mdns but got unable to locate package -- it should be available for bullseye. I installed libnss-mdns and checked that the required files are in `/lib/libnss_mdns* What is missing? How to debug?