Need Help. Why dhcrelay agent donot write information into option 82 ?

[York Chen]

Hi All,
 

I am using Dhcpd(V3.0.4) and Dhclient( V3.0.1) to do some tests on
option82.

 

1. We wrote dhcpd.conf like this.

......

  subnet 172.18.210.0 netmask 255.255.255.0

  {

    log ( info, "Lease for start ! ");

    if exists agent.circuit-id

    {

      log ( info,concat( "Lease ",binary-to-ascii (10, 8, ".",
leased-address)," agent.circuit-id exist"));

    }else{

      log ( info,concat( "Lease ",binary-to-ascii (10, 8, ".",
leased-address)," agent.circuit-id not exist"));

    }

    log ( info, "Lease for end ! ");

    range 172.18.210.10 172.18.210.110;

  }

......

 

2. Start dhcpd in (172.18.210.5)

   /usr/sbin/dhcpd

 

3. Start dhcrelay agent in (eth1:172.20.210.8 , eth0:172.18.210.8)

  /usr/sbin/dhcrelay -d -a -i eth1 172.18.210.8

 

4.Send a dhcp request from a dhclient to dhcrelay agent (172.20.210.3) .
dhcrelay agent  can relay it  to dhcpd and dhcpd can perform this dhcp
lease.

   Dhclient also got this ip address 172.18.210.110.

 

 1 lease has been added into dhcpd.leases file :

......

  lease 172.18.210.110 {

    starts 3 2006/08/30 14:27:20;

    ends 4 2006/08/31 14:27:20;

    binding state active;

    next binding state free;

    hardware ethernet 00:30:48:84:01:60;

  }

 

5. Following is the Syslog. I found  agent.circuit-id not exists.

    dhcrelay agent does not write anything in agent.circuit-id.

    

......

Aug 30 10:27:20 new dhcpd: Lease for start !

Aug 30 10:27:20 new dhcpd: Lease 172.18.210.110 agent.circuit-id not
exist

Aug 30 10:27:20 new dhcpd: Lease for end !

Aug 30 10:27:20 new dhcpd: DHCPREQUEST for 172.18.210.110 from
00:30:48:84:01:60  via eth0

Aug 30 10:27:20 new dhcpd: DHCPACK on 172.18.210.110 to
00:30:48:84:01:60 via eth0

......

 

What is wrong? Any suggestions ?

 

thanks in advance.

 

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York Chen 

e-mail: ychen at bluecatnetworks.com

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