Hi.

You have disabled dynamic routing completely on nodeA. Thus, even direct delivery is not performed in this case. Without any additional static route nodeA does not know how to route bundles for nodeB.

I assume dtnping is working if you ping from nodeA to nodeC, right?

To allow nodeA to ping even nodeB, you need to add an additional route to the configuration of nodeA.

route2 = dtn://nodeB.dtn/* dtn://nodeB.dtn

Alternatively, you can define one route to send all traffic through nodeB.

route1 = dtn://* dtn://nodeB.dtn

Kind regards, Johannes

Am 06.06.2014 03:34, schrieb magda lena:

i chmod 777 the /tmp/blob and got no error anymore :) but the problem is i still cannot dtnping, it always say timeout when i try to dtnping. i will try to explain my configuration

1. i have nodeA, nodeB and nodeC
2. when i did not use routing nodeA-nodeB-nodeC can dtnping each other

(with adhoc network) 3. i want to dtnping from nodeA to nodeC via nodeB 4. so i have this configuration (as you suggest before)

*nodeA (ubuntu) :* limit_blocksize = 1.5G limit_predated_timestamp = 604800 limit_lifetime = 604800 api_interface = any fragmentation =yes

blob_path = /tmp/blob/ storage_path = /home/trie/ibrdtn/bundles storage = default limit_storage = 2.5G #dht_enabled = yes

routing = none routing_forwarding = yes route1 = dtn://nodeC.dtn/* dtn://nodeB.dtn

time_reference = no time_synchronize = yes time_discovery_announcements = yes

*nodeB (raspberry pi) :* limit_blocksize = 1.5G limit_predated_timestamp = 604800 limit_lifetime = 604800 api_interface = any fragmentation =yes

blob_path = /tmp/blob/ storage_path = /home/trie/ibrdtn/bundles storage = default limit_storage = 2.5G #dht_enabled = yes

routing = default routing_forwarding = yes

time_reference = yes time_discovery_announcements = yes

*nodeC (ubuntu) :* limit_blocksize = 1.5G limit_predated_timestamp = 604800 limit_lifetime = 604800 api_interface = any fragmentation =yes

blob_path = /tmp/blob/ storage_path = /home/trie/ibrdtn/bundles storage = default limit_storage = 2.5G #dht_enabled = yes

routing = default routing_forwarding = yes route1 = dtn://nodeA.dtn/* dtn://nodeB.dtn

time_reference = no time_synchronize = yes time_discovery_announcements = yes

5. and i start ibrdtn using "dtnd -i wlan0 -c /etc/ibrdtn/ibrdtnd.conf -c"
6. when i try this from nodeA : dtnping dtn://nodeB/echo it still got

'timeout' and vice versa 7. did i miss something in my configuration ?

thanks for helping me to fix my problem :)