Using a DHCP server for two subnets

Tue Jun 20 16:56:38 UTC 2006

dhcp doesn't cross subnets by default (it's broadcast). You can set up your
vlans with a
helper address pointing to your dhcp server, ir you might try setting up a
dhcp proxy. I
have never set up a dhcp proxy, but I use helper addresses all the time.
Seems to work
ok.

Corey

________________________________

From: kickstart-list-bounces at redhat.com
[mailto:kickstart-list-bounces at redhat.com] On Behalf Of
Elizabeth.Brosch at thomson.com
Sent: Tuesday, June 20, 2006 10:35 AM
To: kickstart-list at redhat.com
Subject: Using a DHCP server for two subnets

Has anyone successfully used one DHCP to serve hosts on two subnets?

If anyone can share their dhcpd.conf syntax, I would appreciate.  I think I
have it correct because the DHCP server will issue:

dhcpd: DHCPDISCOVER......................................

dhcpd: DHCPOFFER..........................................

dhcpd: DHCPREQUEST......................................
dhcpd: DHCPACK...............................................

But then I immediately receive:

in.tftpd[4254]: RRQ from 10.225.248.1 filename pxelinux.0

in.tftpd[4254]: tftpd: read: Connection refused

I am not sure if it is a dhcpd.conf configuration problem or not.  My switch
has "port fast" enabled.  I can Kickstart servers with no problem but when I
introduce a second subnet into my dhcpd, tftp fails.

How anyone ever seen this?

I had tried this a few months ago but was never able to get around it but I
have a need to revisit this now and get it working.

Thanks.

Liz Brosch

TSH System Services

Philadelphia, PA  19104

office:  (215) 823-6144

cell:     (267) 784-9166

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