Send dhcp-users mailing list submissions to
[email protected]
Advertising
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.isc.org/mailman/listinfo/dhcp-users
or, via email, send a message with subject or body 'help' to
[email protected]
You can reach the person managing the list at
[email protected]
When replying, please edit your Subject line so it is more specific
than "Re: Contents of dhcp-users digest..."
Today's Topics:
1. Re: Logging DHCP lease duration in seconds (Alp Eren Kose)
----------------------------------------------------------------------
Message: 1
Date: Wed, 7 Oct 2015 15:53:40 +0300
From: Alp Eren Kose <[email protected]>
To: Users of ISC DHCP <[email protected]>
Subject: Re: Logging DHCP lease duration in seconds
Message-ID:
<CAPJgEWb=dv3xe9uhrgp6tpv_y0j8nmqcj15uunojbgcgf4w...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Thank you very much, I have tried that with no luck. I come accross the
following post from 2007. It seems that it's not possible to log what the
server sends as the lease time duration. People have modified the source to
do that.
https://lists.isc.org/pipermail/dhcp-users/2007-May/003671.html
On Mon, Oct 5, 2015 at 8:24 PM, Bob Harold <[email protected]> wrote:
>
>> On Sun, Oct 4, 2015 at 3:47 PM, Glenn Satchell <
>> [email protected]> wrote:
>>
>>> Hi Alp
>>>
>>> lease-time shows the remaining time in the lease, not the total time.
>>>
>>> This is from the dhcp-eval man page:
>>>
>>> lease-time
>>>
>>> The duration of the current lease - that is, the differ-
>>> ence between the current time and the time that the lease
>>> expires.
>>>
>>> regards,
>>> -glenn
>>>
>>> On Sat, October 3, 2015 6:51 am, Denis Laventure wrote:
>>> > The client will renew the lease at half the max-lease-time. So seeing
>>> 150
>>> > sec for a 300 sec lease seems normal.
>>> >
>>> > Hi,
>>> >
>>> > I have an easy question I believe, I want to log DHCP lease durations
>>> > given to clients, I tried the following, however it appears most of the
>>> > time, logs are showing half of the lease duration.
>>> >
>>> > log(info, concat( "IP: ", binary-to-ascii(10, 8, ".", leased-address),
>>> " ;
>>> > ", "leasetime:", binary-to-ascii(10,32,"",encode-int(lease-time,32))
>>> ));
>>> >
>>> > I have set the following lease time values for a pool:
>>> >
>>> > subnet 172.16.2.0 netmask 255.255.255.0 {
>>> > option routers 172.16.2.1;
>>> > pool {
>>> > failover peer "failover-partner";
>>> > default-lease-time 300;
>>> > min-lease-time 300;
>>> > max-lease-time 300;
>>> > range
>>> 172.16
>>> https://www.dibbssm.net/GroupFiles/Group167/Documents/Cubs/E1_Cub_Fun_In_the_Snow.pdf.2.10
>>> 172.16.2.250;
>>> > }
>>> > }
>>> >
>>> > And this configuration produces an output like this:
>>> >
>>> > Oct 2 14:34:44 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
>>> > Oct 2 14:37:10 mercan dhcpd: IP: 172.16.2.127 ; leasetime:154
>>> > Oct 2 14:37:13 mercan dhcpd: IP: 172.16.2.127 ; leasetime:297
>>> > Oct 2 14:39:37 mercan dhcpd: IP: 172.16.2.127 ; leasetime:156
>>> > Oct 2 14:42:03 mercan dhcpd: IP: 172.16.2.127 ; leasetime:154
>>> > Oct 2 14:44:28 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
>>> > Oct 2 14:46:53 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
>>> > Oct 2 14:49:18 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
>>> > Oct 2 14:49:54 mercan dhcpd: IP: 172.16.2.127 ; leasetime:264
>>> > Oct 2 14:50:47 mercan dhcpd: IP: 172.16.2.127 ; leasetime:247
>>> > Oct 2 14:51:18 mercan dhcpd: IP: 172.16.2.127 ; leasetime:269
>>> >
>>> > How can log the precise lease durations, would be great if anyone has
>>> any
>>> > suggestions?
>>> >
>>> > Thanks in advance.
>>> > Alp
>>>
>>
> Reading the man pages, try replacing:
> lease-time
> with:
> config-option dhcp-lease-time
>
> But do some packet traces to be sure that it truly gives the lease time in
> the first ack packet, which might be the mclt instead of the normal lease
> time if failover is used.
>
> I would like to try it myself sometime when I get a chance.
>
> --
> Bob Harold
>
>
> _______________________________________________
> dhcp-users mailing list
> [email protected]
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.isc.org/pipermail/dhcp-users/attachments/20151007/d0a54fe0/attachment-0001.html>
------------------------------
_______________________________________________
dhcp-users mailing list
[email protected]
https://lists.isc.org/mailman/listinfo/dhcp-users
End of dhcp-users Digest, Vol 84, Issue 5
*****************************************
