Option 82 Issues

[Mike Hammett]

Long term I can probably move 192.168.120.x into 172.19.50.x. 

Short term, I'll see if the shared network will work. There is actually a single 192.168.120.x across all sites and I'm on a project to break them up into a subnet per site (172.19.50.x, 172.19.40.x, etc.). I'll work on a shared network for everything and then "unshare" when I can complete the migration. 


Thank you. 




----- 
Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

The Brothers WISP 

----- Original Message -----

From: "Christian Kratzer" <ck-lists at cksoft.de> 
To: "Users of ISC DHCP" <dhcp-users at lists.isc.org> 
Sent: Saturday, August 25, 2018 2:02:49 AM 
Subject: Re: Option 82 Issues 

Hi, 

On Fri, 24 Aug 2018, Mike Hammett wrote: 
<snipped/> 
> # Genoa 
> subnet 172.19.50.0 netmask 255.255.255.0 { 
> authoritative; 
> deny unknown-clients; 
> } 
> 
> 
> include "/etc/dhcp/dhcpd.d/Genoa.mgmt"; 
> # DSLAMs 
> subnet 192.168.120.0 netmask 255.255.255.0 { 
> } 
> #Genoa.mgmt 
> host Genoa_01_01_01 { 
> host-identifier option agent.circuit-id "Genoa_01_01 atm 1/DSL1:0.36"; 
> fixed-address 172.19.50.1; 
> } 
> host Genoa_01_01_02 { 
> host-identifier option agent.circuit-id "Genoa_01_01 atm 1/DSL2:0.36"; 
> fixed-address 172.19.50.2; 
> } 
> host Genoa_01_01_03 { 
> host-identifier option agent.circuit-id "Genoa_01_01 atm 1/DSL3:0.36"; 
> fixed-address 172.19.50.3; 
> } 
<snippped/> 
> I added the DSLAMs subnet to stop this, " DHCPDISCOVER from d8:b6:b7:ea:8d:44 via 192.168.120.168: unknown network segment", but instead I got this, " DHCPDISCOVER from d8:b6:b7:ea:8d:44 via 192.168.120.168: network 192.168.120.0/24: no free leases". It isn't supposed to be getting an address in the 192.168 range, but in the 172.19 range. That's why I specified the host file. 

your issue is that your request is coming from the 192.168.120.0/24 range which does not match the 172.19.50.0/24 range your have cofigured for your hosts. 

You have two options depending on your network topology: 

1. configure the relay to send from the 172.19.50.0/24 range. 

2. put bot 192.168.120.0/24 and 172.19.50.0/24 subnets into a shared network. 


Greetings 
Christian 



-- 
Christian Kratzer CK Software GmbH 
Email: ck at cksoft.de Wildberger Weg 24/2 
Phone: +49 7032 893 997 - 0 D-71126 Gaeufelden 
Fax: +49 7032 893 997 - 9 HRB 245288, Amtsgericht Stuttgart 
Mobile: +49 171 1947 843 Geschaeftsfuehrer: Christian Kratzer 
Web: http://www.cksoft.de/ 
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