Re: DHCP Agent: Several questions

[Tim Sylvester <[e-mail]>]

>>             2. My understanding is that a single DHCP server can be used
>>                to serve different IP subnetwork. How exactly the new
>> options
>>                help the server to select the subnet ?
>
>    The DHCP RFC isn't clear (to me) on this.  My understanding is that
>    most servers allocate from a pool of addresses associated with the
>reported "giaddr" field.
>
>    Some serves permit the "giaddr" field to select an arbitrary pool. Other
>servers seem to require that the allocated IP addr be on the same
>subnet as the giaddr.  This "same net" requirement will prevent the
>use of "nonrouted" IP addresses to the modems.  That is, the allocated
>IP address to a public DHCP client must be globally routed, and
>servers which require giaddr and the allocated IP addr on the same net
>will required globally routed modem addresses.  All of the public IP
>services wish to AVOID having to assign a global IP addr both to the
>modem and to each public IP client.
>
>    Server vendors, could you respond to this thread and indicate to
>what extent you can support giaddr and assigned IP addr being on 
>different subnets?

Cisco's DHCP server allows you to combine multiple address pools from
different logical subnets in to a single large address pool.  This allows
the "giaddr" to select the "large" pool.

The DHCP server is included in the Cisco DNS/DHCP Manager product and the
Cisco Server Suite 1000 product.  Both of these are currently available for
Solaris, HP-UX and AIX.  The DHCP server is also available for OpenVMS in
the Cisco MultiNet for OpenVMS product.

You can find out more information about the product and download an
evaluation from http://www.cisco.com/dnsdhcp.

Tim
--
Tim Sylvester                                     C i s c o S y s t e m s
Product Manager					        ||        ||
Internet Business Unit                                  ||        ||
tel: [phone]  fax: [phone]             ||||      ||||
e-mail: [e-mail]                        ..:||||||:..:||||||:..