DHCP Server not able to handle the Traffic

sthaug at nethelp.no sthaug at nethelp.no
Sun Apr 26 08:57:10 UTC 2009

> Iam using ISC-DHCP-3.0.5 installed on RHEL5
> When I take a tcpdump on the DHCP Interface; I saw around 1000 DHCP Discovers at the interface but when I see /var/log/messages I can see only around 500 DHCP DISCOVERs over there. 
> Can anyone help me in debugging that where are the discovers being lost and how can I check resolve that

Start by looking at system load. Check to see if the operating system is
losing UDP packets (which could happen), and pay particular attention to
the disk I/O operations. DHCP is often disk I/O bound, and an SSD or a
RAID controller with battery backed cache may help.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no

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