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Full Discussion: Changes in dhcpd.conf do not make a difference in DHCP service behaviour
Top Forums UNIX for Beginners Questions & Answers Changes in dhcpd.conf do not make a difference in DHCP service behaviour Post 303031963 by stomp on Friday 8th of March 2019 06:53:31 AM
Old 03-08-2019
The error happening here is clear. These are the relevant log lines:
Code:
Mar  7 16:19:30 trber dhcpd: No subnet declaration for eth0 (10.210.148.7).
Mar  7 16:19:30 trber dhcpd: ** Ignoring requests on eth0... 
Mar  7 16:19:30 trber dhcpd: Not configured to listen on any interfaces!
Mar  7 16:19:30 trber dhcpd: exiting.

This message means the local system has the given ip at the given interface. But there is no subnet declaration for that. The subnet declaration in your dhcpd.conf is:

Code:
subnet 172.17.126.192 netmask 255.255.255.224

The both does not match. You probably need to add a correct subnet declaration for the same net as the IP 10.210.148.7 is in. But you should not do that without knowing exactly what you are doing and what ip address range may be allowed and dedicated for that. Otherwise you'll disturb network operation in your network by probably causing ip address conflicts with static assigned ip addresses which are the same as in your subnet declaration.

---

Another Guess:

Maybe this is not the dhcp server which is serving the ip address of serverX and there is another dhcp-server active? As far as I see this dhcp-service is doing completely nothing because of the line: Mar 7 16:19:30 trber dhcpd: exiting..

You can check that by reviewing the system log of serverX and look for the ip/mac address of the dhcp-server serving the address.

You can also check with a packet sniffer(tcpdump) what's going on on the network and which ip-address is replying to dhcp-requests.(udp ports 67 & 68).
Last edited by stomp; 03-08-2019 at 08:15 AM.. Reason: Removed first part because it was a wrong guess.
 

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LEARN ABOUT SUNOS

dhcpmgr

dhcpmgr(1M)						  System Administration Commands					       dhcpmgr(1M)

NAME

       dhcpmgr - graphical interface for managing DHCP service

SYNOPSIS

       /usr/sadm/admin/bin/dhcpmgr

DESCRIPTION

       dhcpmgr	is a graphical user interface which enables you to manage the Dynamic Host Configuration Protocol (DHCP) service on the local sys-
       tem. It performs the functions of the dhcpconfig, dhtadm, and pntadm command line utilities. You must be root to use dhcpmgr.  The  dhcpmgr
       Help, available from the Help menu, contains detailed information about using the tool.

USAGE

       You can perform the following tasks using dhcpmgr:

       Configure DHCP service

	   Use dhcpmgr to configure the DHCP daemon as a DHCP server, and select the data store to use for storing network configuration tables..

       Configure BOOTP relay service

	   Use dhcpmgr to configure the DHCP daemon as a BOOTP relay.

       Manage DHCP or BOOTP relay service

	   Use dhcpmgr to start, stop, enable, disable or unconfigure the DHCP service or BOOTP relay service, or change DHCP server parameters.

       Manage DHCP addresses

	   Use dhcpmgr to add, modify, or delete IP addresses leased by the DHCP service.

       Manage DHCP macros

	   Use dhcpmgr to add, modify or delete macros used to supply configuration parameters to DHCP clients.

       Manage DHCP options

	   Use dhcpmgr to add, modify or delete options used to define parameters deliverable through DHCP.

       Convert to a new DHCP data store

	   Use	dhcpmgr  to  configure the DHCP server to use a different data store, and convert the DHCP data to the format used by the new data
	   store.

       Move DHCP data to another server

	   Use dhcpmgr to export data from one Solaris DHCP server and import data onto another Solaris DHCP server.

EXIT STATUS

       The following exit values are returned:

       0	       Successful completion.

       non-zero        An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWdhcm			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       dhcpconfig(1M), dhtadm(1M), pntadm(1M), in.dhcpd(1M), dhcpsvc.conf(4), dhcp_network(4), dhcptab(4), attributes(5), dhcp(5), dhcp_modules(5)

       Solaris DHCP Service Developer's Guide

       System Administration Guide: IP Services

SunOS 5.10							    13 Mar 2001 						       dhcpmgr(1M)
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