Ask is moving to Stack Overflow and! Please use the "opendaylight" tag on either of these sites. This site is now in Read-Only mode


Lithium l2switch removes links between switch after 900 hosts/50 mins.

asked 2015-09-30 21:55:15 -0700

HI, I am running three switch topology s1 s2 and s3 with 1000 hosts on s1 side and 1 host on s3 side. My topology is linear. I am making communication between 1000 hosts and 1 host which is connected with s3 switch using IPERF. I was having target to 1000 clients one by one but when I reach till 900 approx lithium removes the link between switches and further host is not able to communicate. Further observation are, a)After 900 hosts suddenly link removes come on ODL logs. b)Network graph becomes null.

Thank you so much in advance Devesh

edit retag flag offensive close merge delete

2 answers

Sort by ยป oldest newest most voted

answered 2015-10-28 09:48:03 -0700

aanm gravatar image

Can you provide more logs? I had issues in the past with mininet when a large amount of connections were on. Thanks

edit flag offensive delete publish link more

answered 2015-10-28 13:28:13 -0700

This seems like mininet issue as suggested above. L2switch is just reacting to an event received from switch that the link/port is down. Link removal would happen only in case of loops ideally.

Other possibility is loss of lldp flow issue. Things to check is if the s1, s2, s3 still have the original lldp flows installed then the controller code is not initiating this link drop. It could be mininet which is running out of resources at that time?

This is just a thought based on information provided.

edit flag offensive delete publish link more
Login/Signup to Answer

Question Tools

1 follower


Asked: 2015-09-30 21:55:15 -0700

Seen: 989 times

Last updated: Oct 28 '15