| Date: | Wed, 07 Feb 2018 15:14:39 +0000 |
| From: | tmark@isc.org |
| Subject: | delayed-ack default of 0 interferes with lease ACK commits in ISC DHCP 4.4.0. |
| To: | dhcp-public@isc.org |
A change made for 4.4.0, to compile in delayed-ack support by default but to default the number of acks to 0, was intended to include the popular feature but with it turned off.
The default of 0 is causing lease ACKs to not be written to the database. The work around without recompiling, is to add:
delayed-acks 1;
To the dhcpd configuration file. Alternatively, you may change the default explicitly in the code to be the desired value:
# define DEFAULT_DELAYED_ACK 0 /* default SO_SNDBUF size / 576 bytes */
or disable the feature at compile time by rebuilding with --disable-delayed-acks.