Multiple IP's

David Peterson davidp at wirelessconnections.net
Thu Jun 27 14:38:05 UTC 2013


The main issue is not which interface is listening, only which IP address
responds.  I think the only fix is to have multiple NICs with routing
statements to the NIC.

David


-----Original Message-----
From: dhcp-users-bounces+davidp=wirelessconnections.net at lists.isc.org
[mailto:dhcp-users-bounces+davidp=wirelessconnections.net at lists.isc.org] On
Behalf Of John Miller
Sent: Thursday, June 27, 2013 10:35 AM
To: Users of ISC DHCP
Subject: Re: Multiple IP's

My goof anyhow, David.

 From the dhcpd.conf manpage:

"Note also that since this bind()s all DHCP sockets to the specified
address, that only one address may be supported in a daemon at a given
time."

That doesn't do you much good.

John


On 06/27/2013 10:19 AM, David Peterson wrote:
> We are not using the local-address parameter.  Can this be defined per 
> scope?
>
> David
>
>
> -----Original Message-----
> From: dhcp-users-bounces+davidp=wirelessconnections.net at lists.isc.org
> [mailto:dhcp-users-bounces+davidp=wirelessconnections.net at lists.isc.or
> g] On Behalf Of John Miller
> Sent: Thursday, June 27, 2013 10:21 AM
> To: Users of ISC DHCP
> Subject: Re: Multiple IP's
>
> Hi David,
>
> What do your interface assignments and routing tables look like?  
> Also, are you using the local-address parameter, or are you listening on
0.0.0.0?
>
> John
>
>
> On 06/27/2013 09:54 AM, David Peterson wrote:
>> I have a DHCP server requirement whereby we have to have multiple IP 
>> addresses that the DHCP process is listening on.  In addition, the 
>> equipment which is sending the DHCP request relay requires the 
>> response to come from the original IP address to which it is sent.
>> The problem comes in when we use multiple addresses on the same NIC.
>> More often than not it comes from the primary IP address.  Is there a 
>> way to force the daemon to send the response from the appropriate
address?
>>
>> David
>>
>>
>>
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>>
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