Monitor Zeroconf advertisements:
avahi-browse -a --resolve
If you want Avahi to publish your SSH service you must create a service config for it. You can usually just copy the example one and use it without editing it.
cp /usr/share/doc/avahi-daemon/examples/ssh.service /etc/avahi/services/.
If that example is not available then the following should work if copied to /etc/avahi/services/ssh.service.
<?xml version="1.0" standalone='no'?><!--*-nxml-*--> <!DOCTYPE service-group SYSTEM "avahi-service.dtd"> <service-group> <name replace-wildcards="yes">%h</name> <service> <type>_ssh._tcp</type> <port>22</port> </service> </service-group>