Logging circuit-id

Sean McMurray sean at mvtel.com
Wed Mar 18 14:03:30 UTC 2015


version 4.1.1
yes. it is DHCPv6, by default.

On 03/18/2015 06:21 AM, perl-list wrote:
> What version of ISC DHCP, and is this DHCPv6 that you are trying to log?
>
> ------------------------------------------------------------------------
>
>     *From: *"Sean McMurray" <sean at mvtel.com>
>     *To: *"Users of ISC DHCP" <dhcp-users at lists.isc.org>
>     *Sent: *Tuesday, March 17, 2015 9:22:30 PM
>     *Subject: *Re: Logging circuit-id
>
>     I can tell it to log(error, "Hello") and it won't log.
>
>     On 03/17/2015 06:15 PM, perl-list wrote:
>
>
>         Here is an example of how I have done it:
>
>         if exists agent.circuit-id {
>
>                 log ( error,
>
>                         concat( "agent.circuit-id,", binary-to-ascii
>         (10, 8, ".", leased-address),",",
>
>         "circuit-id,",option agent.circuit-id,",",
>
>         "time,",binary-to-ascii(10,32,"",encode-int (lease-time,32)),",",
>
>         "hardware,",binary-to-ascii(16,8,":",substring(hardware,1,7))
>
>                         )
>
>                 );
>
>         }
>
>
>         If that doesn't work then the circuit-id may not be there (if
>         no line appears at all in the logs), or if it only logs a
>         partial line then the circuit-id is likely binary instead of
>         ASCII.  I'm not sure how to log if it is binary - some use of
>         binary-to-ascii will be necessary.
>
>         ------------------------------------------------------------------------
>
>             *From: *"Sean McMurray" <sean at mvtel.com>
>             *To: *dhcp-users at lists.isc.org
>             *Sent: *Tuesday, March 17, 2015 5:51:16 PM
>             *Subject: *Logging circuit-id
>
>             I would like my dhcpd logs to include circuit-id.
>             I have tried to use log() directives in my conf file, but
>             nothing I have
>             tried works.
>
>             Here is an example of a configuration I have included in a
>             subnet:
>
>                log(info, concat(
>                  " Mac: ",binary-to-ascii(16, 8, ":",
>             substring(hardware,1, 6))
>                  ," IP: ",binary-to-ascii (10, 8, ".", leased-address)
>                  ,"Circuit: ",option agent.circuit-id
>                ));
>
>
>             Standard logging is working fine to record DHCPDISCOVER,
>             DHCPOFFER, etc.
>             I just can't get custom entries to show up in the log.
>
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>
>
>
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>
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