ISC DHCP limitation observed while load testing with dhcperf

Amit Jathar amit.jathar at alepo.com
Thu May 30 14:30:11 UTC 2013


Hi,

I am performing load test of ISC - DHCP.
The DHCP server is handling only 30TPS till now.
I am using following dhcperf command :-
dhcperf --server x.x.x.x --discover --retain-leases --test-load 50 --test-duration 60

I have ran series of tests as follows :-

tx/sec (TPS)

Duration (sec)

Success Rate (%)

100

60

11.7

100

60

12

50

300

36.7

30

300

97.5

30

150

99.8

30

600

96.4

30

60

100

2 clients - 30TPS each

60

40% each



The above table implies that when there is one perf client sending 30 TPS, servers handles perfectly.
But, when I increase TPS or add one more perf client with 30 TPS, the server performance degrades.
This concludes that the DHCP server can handle only 30 TPS.

Can you please share your experiences on load test with dhcperf , if you are getting more TPS than this.
Also let me know if I can do any kind of optimization to achieve more TPS.
I have defined only one pool in the dhcpd.conf & I don't see there is any other configuration available regarding load testing.

Thanks,
Amit


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