Dear Johannes, Thanks so much for the info. I could set up different daemons now, but when I try to ping any with api port other than 4550 it says 'Cannot connect to daemon. Does itrun?' . I have tried to set up static nodes, add link and routes, and also the --nodiscoveryoption, but all give the same error. Here is my config file. Am I doing something wrongin the config file? api_port = 1234console set addr 127.0.0.1console set port 5050set shorthostname [lindex [split [info hostname] .] 0]console set prompt "$shorthostname dtn% "discovery_announce = 0route set type staticroute local_eid "dtn://[info hostname].dtn"interface add tcp0 tcp interface add udp0 udplink add link1 127.0.0.1:5050 ONDEMAND udproute add dtn://aayush-pc/* link1 Thanks for helping in advance. Aayush Rana