[L2SWITCH-43] Host Tracker is not learning all the hosts at scale. Created: 21/May/15  Updated: 19/Oct/17

Status: Confirmed
Project: l2switch
Component/s: General
Affects Version/s: unspecified
Fix Version/s: None

Type: Bug
Reporter: SANDEEP GANGADHARAN Assignee: Unassigned
Resolution: Unresolved Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified
Environment:

Operating System: All
Platform: All

External issue ID: 3326
Priority: Low

 Description   

1) Install controller
2) Enable features
feature:install odl-l2switch-all
feature:install odl-l2switch-switch-rest

3) Connect a mininet switch with 400+ hosts connected.
4) Do one round of ping between the hosts. (ping with -c 1 option)
5) Pings are successful.
6) Make REST call and count the hosts.
7) Not all hosts are learned.
8) This is happening only at scale of 400+.
9) The test is automated and the result is available below link
https://jenkins.opendaylight.org/releng/job/l2switch-csit-periodic-1node-cds-host-scalability-daily-only-master/plot/Inventory%20Host%20Scalability/

10) This behavior is noticed with Helium too.

 Comments   
Comment by SANDEEP GANGADHARAN [ 21/May/15 ]

From logs I can make out that in case of 300 hosts controller learned all within 3 seconds.
In case of 400 hosts i wait for 3minutes and still all hosts are not learned.

Note: If the number of ping counts are increased we can scale more.

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