migrate from remotely located to central servers

[Bill Shirley]

So, the DISCOVER is not matching any of your classes.  Define another pool to issue
leases from that doesn't match any class:
      pool {
         deny members of "RegionX-RGMGMT-CPE-MODELx";
         deny members of "RegionX-BOOT-CPE-MODELx";
         deny members of "RegionX-INET";

         deny dynamic bootp clients;
         authoritative;
         range 192.168.xxx.2 192.168.xxx.15;
     }

This should issue a lease and trigger your 'on commit' log statement.

Bill

On 7/29/2020 12:35 PM, Jason Brooks wrote:
> Hello,
>
> I am having trouble relocating and upgrading a number of dhcp servers.  I am upgrading from solaris running dhcpd 3.0.4 to 
> centos 7's dhcp 4.2.5-77.
>
> The problem: when I test the config on the new dhcp servers, I get the following error: "No free leases".
>
> As I am still testing, I have not copied the leases thus it is not clear why there would be no free leases.
>
> As I have no lab equipment to test against,  I am generating similar queries using the dhtest 
> <https://sargandh.wordpress.com/2012/02/23/linux-dhcp-client-simulation-tool/>tool.  I started with a packet capture on the 
> live dhcp servers and constructed a dhcp discovery packet based on it.  I have also started small, with the smallest 
> configuration possible that should still work.
>
> The queries originate from DSL customer premises equipment (CPE), and are forwarded by a dsl shelf manager.  The 
> relevant fields in the forwarded queries are as follows:
> giaddr: <management ip of dsl shelf>  (Please note this is NOT the ip address facing the CPE)
> chaddr: <mac of CPE>
> option 82.1: circuit id
> option 82.2: remote id
> option 60: vendor class identifier (only on boot and management classes)
>
> The current live system is running 8 pairs of dhcp servers in different regions.  They have been successfully running for more 
> than 8 years.  At last count there are about 440,000 active leases.
>
> I am attempting to build a pair of centrally located servers.  I am not trying to do HA yet.
>
> I am including a sanitized dhcpd.conf file for you to look at.
>
> Thank you all for your time!
>
> --jason
>
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