[dtn-users] LTP Convergence Layer - Help needed!

[Nik Ansell <[e-mail]>]

Hi,

I have successfully setup a 3 node UDPCL and TCPCL topology and am able to
send bundles OK.

Next I installed LTPLib and rebuilt DTN2, ensuring that ./configure found
the location of LTPlib OK.

I have updates the config files to use ltp, but for some reason no bundles
seem to be sent or queued!

If anyone could shed any light on a possible problem I will be forever in
their debt, as bundles just seem to disappear!

My testing so far has been starting dtnd on all 3 nodes, then running the
dtnsend command twice to send 2 test bundles from node 1 to node 3.
"dtnsend -s dtn://tx.dtn/a -d dtn://rx.dtn/g -t m -p "hello""

I run dtnrecv on node 3:
"dtnrecv dtn://rx.dtn/g -q -o F#####.bin"

"bundle list" on nodes 1,2&3" returns zero bundles, so none are in the
queue.
"bundle stats" on node 1 returns:

Bundle Statistics: 0 pending -- 0 custody -- -- bpq --  bpq -- 2 received
-- 0 delivered -- 0 generated -- 2 transmitted -- 0 expired -- 0 duplicate
-- 2 deleted -- 0 injected

"link dump link_ltp1" on node 1 returns:

Current link:

Link link_ltp1:

clayer: ltp

type: ALWAYSON

state: OPEN

deleted: false

nexthop: mx:4556

remote eid: dtn:none

mtu: 1400

min_retry_interval: 5

max_retry_interval: 600

idle_close_time: 0

potential_downtime: 30

prevhop_hdr: false

reincarnated: true

used in fwdlog: true

local_addr: 255.255.255.255 local_port: 4556

remote_addr: 10.0.0.2 remote_port: 4556

mtu: 1400

Red/Green balance: all red

ION mode: false

Config files:

Node1
interface add udp0 udp
interface add ltp0 ltp local_addr=$shorthostname

# Create link to MX
link add link_ltp1 mx:4556 ALWAYSON ltp mtu=1400 local_port=4556
remote_port=4556 remote_addr=10.0.0.2

# Add route to RX via MX
route add dtn://rx.dtn/* link_ltp1

Node2:
interface add udp0 udp
interface add ltp0 ltp local_addr=$shorthostname

# Create link to TX
link add link_ltp2 tx:4556 ALWAYSON ltp local_port=4556 remote_port=4556
mtu=1400 remote_addr=10.0.0.1

# Create link to RX
link add link_ltp3 rx:4556 ALWAYSON ltp local_port=4556 remote_port=4556
mtu=140 remote_addr=10.0.0.3

# Add route to TX
route add dtn://tx.dtn/* link_ltp2

# Add route to RX
route add dtn://rx.dtn/* link_ltp3

Node3:
interface add udp0 udp
interface add ltp0 ltp local_addr=$shorthostname

# Create link to MK
link add link_ltp1 mx:4556 ALWAYSON ltp local_port=4556 remote_port=4556
remote_addr=10.0.0.2

# Add route to TX via MX
route add dtn://tx.dtn/* link_ltp1

Kind Regards,
Nik