Re: option 82 on isc dhcp

From: Dan Ross (dan.ross_at_hamiltontel.com)
Date: 06/28/05

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    Date: Tue, 28 Jun 2005 11:51:12 -0500
To: Eric Anderson <anderson@centtech.com>

    lease-file-name "/var/db/dhcpd.leases";
    ddns-update-style none;
    authoritative;
    option agent.circuit-id 2 ;
    default-lease-time 3100; # 51 minutes.
    max-lease-time 604800; # 1 week

    subnet 10.10.10.0 netmask 255.255.255.0 {
            option routers 10.10.10.1;
            option subnet-mask 255.255.255.0;
            option broadcast-address 10.10.10.255;

            # The latest input from layer-9 required us to shift the dynamic
            # range from the top half of the subnet down to the bottom half.
            # This pool clause will elicit NAKs for the old leases while the
            # clients migrate. Remember to remove this once they've all booted
            # once or expired.
            pool {
                    range 10.10.10.12 10.10.10.127;
    }
    if exists agent.circuit-id
    {
            log ( info, concat( "Lease for ", binary-to-ascii (10, 8, ".",
    leased-ad
    dress), " is connected to interface ",
            binary-to-ascii (10, 8, "/", suffix ( option agent.circuit-id,
    2)), " (a
    dd 1 to port number!), VLAN ",
            binary-to-ascii (10, 16, "", substring( option agent.circuit-id,
    2, 2)),
      " on switch ",
            binary-to-ascii(16, 8, ":", substring( option agent.remote-id,
    2, 6))));

            log ( info, concat( "Lease for ", binary-to-ascii (10, 8, ".",
    leased-ad
    dress),
            " raw option-82 info is CID: ", binary-to-ascii (10, 8, ".",
    option agen
    t.circuit-id), " AID: ",
            binary-to-ascii(16, 8, ".", option agent.remote-id)));

    Eric Anderson wrote:

    > Dan Ross wrote:
    >
    >> Eric,
    >> Thanks I have tried using that in my conf file but the original
    >> author didnt seem to know where he got his stuff for data entries. I
    >> am struggling to even understand his logging entry in the conf file.
    >> How does one submit a mail to the isc-org. dhcp server mailing
    >> list. I have the entry in my conf file but no entries are added to
    >> my log file even though the server spews out an address. Any ideas?
    >
    >
    > Can you post your config file? (minus any extra junk we don't need)
    >
    > Eric
    >
    >
    >
    >> Eric Anderson wrote:
    >>
    >>> Dan Ross wrote:
    >>>
    >>>> Hello;
    >>>> I am trying to configure my freebsd ISC dhcp server to support and
    >>>> log option 82 requests. Can anybody direct me to a how to page or
    >>>> even maybe render some assistance if they have done this before?
    >>>
    >>>
    >>>
    >>>
    >>> I don't know all the details, but maybe these snippets and links can
    >>> help you:
    >>>
    >>> agent.circuit-id is also known as option 82
    >>>
    >>> http://www.archivum.info/dhcp-server%40isc.org/2005-02/msg00026.html
    >>> http://www.archivum.info/dhcp-server%40isc.org/2005-06/msg00142.html
    >>>
    >>> man dhcp-options
    >>> man dhcp-eval
    >>>
    >>> http://www.faqs.org/rfcs/rfc3046.html
    >>>
    >>> dhcpd.conf hints:
    >>> Top of dhcpd.conf (you may have to do this, you may not):
    >>> option agent.circuit-id code 82 = string; # is it a string?
    >>>
    >>> That's all I could conjure up..
    >>>
    >>> Eric
    >>>
    >>>
    >>>
    >>>
    >>>
    >
    >
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