on the linux console, type:
i=1; \
while [ $i != 254 ]; do \
ping -c 1 192.168.1.$i; \
i=`expr $i + 1`; \
done
arp -a
That should give a list of all computers on that subnet 192.168.1.0. The MAC address should tell you the IP address of the print server.
Find IP address of a Pocket Print Server (e.g. DP-301P+)