single dhcp server with multiple subnets

[Senko, Mike]

The switch configuration is attached.

It's really pretty basic, it's a rugged com switch, menu driven/selection. I've configured the dhcp relay agent and the ports where the clients and server reside. Hmm, I'll move the server to a different port to differentiate client/server a little more but have low expectations for success.

Mike

-----Original Message-----
From: dhcp-users-bounces at lists.isc.org [mailto:dhcp-users-bounces at lists.isc.org] On Behalf Of Joseph Bernard
Sent: Wednesday, July 30, 2014 8:48 AM
To: Users of ISC DHCP
Subject: Re: single dhcp server with multiple subnets

Can you attach the config for your switch?

Thanks,
Joseph B.

On Jul 30, 2014, at 11:40 AM, Senko, Mike <Mike.Senko at seattle.gov> wrote:

> Spent the day yesterday working on the issue and decided to break the 
> network down to more basic elements to try to at least cross vlans for dhcp requests.
> 
> I reconfigured the network so both the dhcp server and dhcp client are on the same network switch.
> 
> I placed the dhcp server in vlan6, as before and placed the dhcp client in vlan 7 (or 8 or 5). 
> The DHCP server receives the dhcp request and assigns an address, 
> always for its own vlan, vlan6 as evidenced in the syslog messages.
> 
> It suggests the dhcp relay agent is not passing on the vlan/subnet 
> information from the client. I don't know what else to think at the moment.
> 
> This is my first time setting up a dhcp server, if anyone can critique the dhcpd.conf configuration I can at least eliminate that from my troubleshooting. I have attached both the Config and syslog outputs to this email.
> 
> Thanks,
> 
> Mike
> 
> -----Original Message-----
> From: dhcp-users-bounces at lists.isc.org 
> [mailto:dhcp-users-bounces at lists.isc.org] On Behalf Of Simon Hobson
> Sent: Tuesday, July 29, 2014 12:16 AM
> To: Users of ISC DHCP
> Subject: Re: single dhcp server with multiple subnets
> 
> "Senko, Mike" <Mike.Senko at seattle.gov> wrote:
> 
>> Jul 28 11:48:06 TestLabPC dhcpd: DHCPDISCOVER from b4:b5:2f:29:d1:c9
>> (SCL2304L) via 10.1.6.2 Jul 28 11:48:07 TestLabPC dhcpd: DHCPOFFER on
>> 10.1.6.200 to b4:b5:2f:29:d1:c9 (SCL2304L) via 10.1.6.2
> 
>> 13:00:53.378085 IP 10.1.6.2.43408 > 10.1.6.56.bootps: BOOTP/DHCP, 
>> Request from b4:b5:2f:29:d1:c9 (oui Unknown), length 303
>> 13:00:54.379236 IP 10.1.6.56.bootps > 10.1.6.2.bootps: BOOTP/DHCP, 
>> Reply, length 300
> 
>> If I connect the laptop to the same switch as the dhcp server switch,
>> vlan6 (10.1.6.0/24), the laptop picks up the address 10.1.6.200 - as 
>> expected
> 
> It looks like you still do not have your network setup correctly. I 
> know from experience that some switches are "not very intuitive" when 
> setting up VLANs :(
> 
> I would suggest manually configuring 1 or more devices with IP addresses appropriate to the network they *should* be in and get the network correct. Once you fix that then you should find the DHCP "just works".
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
> <dhcpd.conf><syslog>_______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users

_______________________________________________
dhcp-users mailing list
dhcp-users at lists.isc.org
https://lists.isc.org/mailman/listinfo/dhcp-users
-------------- next part --------------
A non-text attachment was scrubbed...
Name: rgconfig.bak
Type: application/octet-stream
Size: 31042 bytes
Desc: rgconfig.bak
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20140730/3ab14e3b/attachment-0001.obj>