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| author | Tomek Mrugalski <tomek@isc.org> | 2011-04-21 13:24:24 +0000 |
|---|---|---|
| committer | Tomek Mrugalski <tomek@isc.org> | 2011-04-21 13:24:24 +0000 |
| commit | 5d082abd92512487ca885d74656ba48d6e39b2f6 (patch) | |
| tree | 2c37a21a777f8cd193cdb3579a23733da2986686 /client/dhclient.conf.5 | |
| parent | 5ce8d6e7496a842e1eb770eb636b6480ad328d12 (diff) | |
| download | isc-dhcp-5d082abd92512487ca885d74656ba48d6e39b2f6.tar.gz | |
Several time related improvements:
- set initial delay to 0 to speed up client start
- added 'initial-delay' parameter to possibly revert to old behavior
- better handling of very short (1 or 2s) leases
- client lease records are recorded at most once every 15 seconds
- ICMP ping-check is now timed more precisely
- Servers that don't offer lease-time are now black-listed
[ISC-Bugs #19660]
Diffstat (limited to 'client/dhclient.conf.5')
| -rw-r--r-- | client/dhclient.conf.5 | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/client/dhclient.conf.5 b/client/dhclient.conf.5 index 23000883..65faa42c 100644 --- a/client/dhclient.conf.5 +++ b/client/dhclient.conf.5 @@ -1,6 +1,6 @@ -.\" $Id: dhclient.conf.5,v 1.31 2010/09/14 23:05:39 sar Exp $ +.\" $Id: dhclient.conf.5,v 1.32 2011/04/21 13:24:24 tomasz Exp $ .\" -.\" Copyright (c) 2009-2010 by Internet Systems Consortium, Inc. ("ISC") +.\" Copyright (c) 2009-2011 by Internet Systems Consortium, Inc. ("ISC") .\" Copyright (c) 2004,2007 by Internet Systems Consortium, Inc. ("ISC") .\" Copyright (c) 1996-2003 by Internet Software Consortium .\" @@ -163,6 +163,21 @@ is sent, the interval between messages is incremented by twice the current interval multiplied by a random number between zero and one. If it is greater than the backoff-cutoff amount, it is set to that amount. It defaults to ten seconds. +.PP +.I The initial-delay +.I statement +.PP + \fBinitial-delay \fItime\fR\fB;\fR +.PP +.I initial-delay +parameter sets the maximum time client can wait after start before +commencing first transmission. +According to RFC2131 Section 4.4.1, client should wait a random time between +startup and the actual first transmission. Previous versions of ISC DHCP +client used to wait random time up to 5 seconds, but that was unwanted +due to impact on startup time. As such, new versions have the default +initial delay set to 0. To restore old behavior, please set initial-delay +to 5. .SH LEASE REQUIREMENTS AND REQUESTS The DHCP protocol allows the client to request that the server send it specific information, and not send it other information that it is not |