[Mini-NDN] Links not working

[Vince Lehman (vslehman)]

Hi Navdeep,

I believe the problem may be with the “pingall" command and not with link establishment. The pingall command seems to report that certain nodes cannot ping their neighbors, but if you ping manually from the node using the neighbor’s IP address, you should receive a response.

Can you try to ping from sa to hb manually using hb's IP address to confirm?

--
Vince Lehman

On Sep 11, 2015, at 7:52 AM, Navdeep Uniyal <navdeep.uniyal at neclab.eu<mailto:navdeep.uniyal at neclab.eu>> wrote:

Hello All,

Pretty strange but suddenly I am facing problems with the link establishment in minindn, below is the snippet. Only few links are getting established while others are not. I tried a few different configurations but everytime I am facing similar problem:



*** Adding hosts:
ca ga ha hb hc sa sb
*** Adding switches:

*** Adding links:
(5.00Mbit 0ms delay) (5.00Mbit 0ms delay) (ca, ga) (1.00Mbit 0ms delay) (1.00Mbit 0ms delay) (ga, ha) (1.00Mbit 0ms delay) (1.00Mbit 0ms delay) (ga, hb) (1.00Mbit 0ms delay) (1.00Mbit 0ms delay) (ga, hc) (1.00Mbit 0ms delay) (1.00Mbit 0ms delay) (ha, sa) (1.00Mbit 20ms delay) (1.00Mbit 20ms delay) (hb, sa) (1.00Mbit 20ms delay) (1.00Mbit 20ms delay) (hb, sb) (1.00Mbit 0ms delay) (1.00Mbit 0ms delay) (hc, sb)
*** Configuring hosts
ca ga ha hb hc sa sb
Setup time: 14
*** Starting controller
c0
*** Starting 0 switches

*** Starting CLI:
mininet> pingall
*** Ping: testing ping reachability
ca -> ga X X X X X
ga -> ca ha hb hc X X
ha -> X X X X sa X
hb -> X X X X X sb
hc -> X X X X X X
sa -> X X X X X X
sb -> X X X X X X
*** Results: 83% dropped (7/42 received)


Below is the configuration file I am using for my experiment:

[nodes]
ca: _
ga: _
ha: _
hb: _
hc: _
sa: _
sb: _
[links]
ca:ga delay=0ms bw=5
ga:ha delay=0ms bw=1
ga:hb delay=0ms bw=1
ga:hc delay=0ms bw=1
ha:sa delay=0ms bw=1
hb:sb delay=20ms bw=1
hb:sa delay=20ms bw=1
hc:sb delay=0ms bw=1



Please if someone can explain and can help me what I might be doing wrong in establishing the connection.


Best Regards,
Navdeep Uniyal

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