RE: Re： Check Relay Agent IP address

[Randall C Grimshaw]

Two solutions that come to mind are:  a.) treat the networks separately if they need to be. This may be difficult if the relay agents are wireless AP’s. or b.) treat the pool as a single shared resource and break out the user groups in the reporting.
These may or may not solve the problem, but it is what comes to mind with the detail at hand.

Randy

From: dhcp-users-bounces+rgrimsha=syr.edu at lists.isc.org [mailto:dhcp-users-bounces+rgrimsha=syr.edu at lists.isc.org] On Behalf Of Billy Ng
Sent: Tuesday, February 02, 2010 11:39 PM
To: Users of ISC DHCP
Subject: Re： Check Relay Agent IP address

Hi Glenn,

I've a address pool 192.168.1.x which contain 200 ip addresses. When I generated over 200 dhcp request (say 210) in this VLAN (relay agent IP = 192.168.1.254), all the addresses in this pool is used and the other address also being used (192.168.2.x).

How could I prevent this problem?

Best Regards,
Billy

________________________________
寄件人﹕ Glenn Satchell <glenn.satchell at uniq.com.au>
收件人﹕ Users of ISC DHCP <dhcp-users at lists.isc.org>
傳送日期﹕ 2010/2/3 (三) 12:20:34 PM
主題： Re: Check Relay Agent IP address

Hi Billy

The dhcp server does this automatically. If a request comes in from a remote subnet, the dhcp relay agent adds in the gateway address as it forwards the packet. The dhcp server looks at this gateway address and automatically matches it with a subnet declaration for you.

There is no special dhcpd.conf configuration required. A subnet declaration is the same whether it is a locally attached or remote network.

regards,
-glenn

Billy Ng wrote:
> Dear All,
>
> Is it possible to check the relay agent IP before assign an dynamic IP address to the DHCP client? Say if the server contains multiple address pool from 192.168.1.x to 192.168.10.x. And the client only can obtain the IP address from pool 192.168.1.x if the relay agent IP is 192.168.1.254.
> Thanks in advise.
>
> Best Regards,
> Billy
>
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