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Output from the DHCP Server in Debugging Mode
Normal server debugging mode output shows server configuration information followed by information about each network interface as the daemon starts. After daemon startup, the debugging mode output shows information about requests the daemon processes. Example 17-3 shows debugging mode output for a DHCP server that has just started. The server extends the lease for a client that is using an address owned by another DHCP server that is not responding.
Example 17-3 Normal Output for DHCP Server in Debugging Mode
Daemon Version: 3.1
Maximum relay hops: 4
Transaction logging to console enabled.
Run mode is: DHCP Server Mode.
Datastore: nisplus
Path: org_dir.dhcp.test..:dhcp.test..:$
DHCP offer TTL: 10
Ethers compatibility enabled.
BOOTP compatibility enabled.
ICMP validation timeout: 1000 milliseconds, Attempts: 2.
Monitor (0005/hme0) started...
Thread Id: 0005 - Monitoring Interface: hme0 *****
MTU: 1500 Type: DLPI
Broadcast: 10.21.255.255
Netmask: 255.255.0.0
Address: 10.21.0.2
Monitor (0006/nf0) started...
Thread Id: 0006 - Monitoring Interface: nf0 *****
MTU: 4352 Type: DLPI
Broadcast: 10.22.255.255
Netmask: 255.255.0.0
Address: 10.22.0.1
Monitor (0007/qfe0) started...
Thread Id: 0007 - Monitoring Interface: qfe0 *****
MTU: 1500 Type: DLPI
Broadcast: 10.23.63.255
Netmask: 255.255.192.0
Address: 10.23.0.1
Read 33 entries from DHCP macro database on Tue Aug 10 15:10:27 2006
Datagram received on network device: qfe0
Client: 0800201DBA3A is requesting verification of address owned by 10.21.0.4
Datagram received on network device: qfe0
Client: 0800201DBA3A is requesting verification of address owned by 10.21.0.4
Datagram received on network device: qfe0
Client: 0800201DBA3A is requesting verification of address owned by 10.21.0.4
Datagram received on network device: qfe0
Client: 0800201DBA3A maps to IP: 10.23.3.233
Unicasting datagram to 10.23.3.233 address.
Adding ARP entry: 10.23.3.233 == 0800201DBA3A
DHCP EXTEND 0934312543 0934316143 10.23.3.233 10.21.0.2
0800201DBA3A SUNW.Ultra-5_10 0800201DBA3A
|
Example 17-4 shows debugging mode output from a DHCP daemon that starts as a BOOTP relay agent. The agent relays requests from a client to a DHCP server, and relays the server's responses to the client.
Example 17-4 Normal Output from BOOTP Relay in Debugging Mode
Relay destination: 10.21.0.4 (blue-servr2) network: 10.21.0.0 Daemon Version: 3.1 Maximum relay hops: 4 Transaction logging to console enabled. Run mode is: Relay Agent Mode. Monitor (0005/hme0) started... Thread Id: 0005 - Monitoring Interface: hme0 ***** MTU: 1500 Type: DLPI Broadcast: 10.21.255.255 Netmask: 255.255.0.0 Address: 10.21.0.2 Monitor (0006/nf0) started... Thread Id: 0006 - Monitoring Interface: nf0 ***** MTU: 4352 Type: DLPI Broadcast: 10.22.255.255 Netmask: 255.255.0.0 Address: 10.22.0.1 Monitor (0007/qfe0) started... Thread Id: 0007 - Monitoring Interface: qfe0 ***** MTU: 1500 Type: DLPI Broadcast: 10.23.63.255 Netmask: 255.255.192.0 Address: 10.23.0.1 Relaying request 0800201DBA3A to 10.21.0.4, server port. BOOTP RELAY-SRVR 0934297685 0000000000 0.0.0.0 10.21.0.4 0800201DBA3A N/A 0800201DBA3A Packet received from relay agent: 10.23.0.1 Relaying reply to client 0800201DBA3A Unicasting datagram to 10.23.3.233 address. Adding ARP entry: 10.23.3.233 == 0800201DBA3A BOOTP RELAY-CLNT 0934297688 0000000000 10.23.0.1 10.23.3.233 0800201DBA3A N/A 0800201DBA3A Relaying request 0800201DBA3A to 10.21.0.4, server port. BOOTP RELAY-SRVR 0934297689 0000000000 0.0.0.0 10.21.0.4 0800201DBA3A N/A 0800201DBA3A Packet received from relay agent: 10.23.0.1 Relaying reply to client 0800201DBA3A Unicasting datagram to 10.23.3.233 address. Adding ARP entry: 10.23.3.233 == 0800201DBA3A |
If there is a problem with DHCP, the debugging mode output might display warnings or error messages. Use the following list of DHCP server error messages to find solutions.
ICMP ECHO reply to OFFER candidate: ip_address disabling
Cause: Before the DHCP server offers an IP address to a client, the server pings the address to verify that the address is not in use. If a client replies, the address is in use.
Solution: Make sure the addresses that you configured are not already in use. You can use the ping command. See the ping(1M) man page for more information.
No more IP addresses on network-address network.
Cause: No IP addresses are available in the DHCP network table associated with the client's network.
Solution: Create more IP addresses with DHCP Manager or the pntadm command. If the DHCP daemon is monitoring multiple subnets, be sure the additional addresses are for the subnet where the client is located. See Adding IP Addresses to the DHCP Service for more information.
No more IP addresses for network-address network when you are running the DHCP daemon in BOOTP compatibility mode.
Cause: BOOTP does not use a lease time, so the DHCP server looks for free addresses with the BOOTP flag set to allocate to BOOTP clients.
Solution: Use DHCP Manager to allocate BOOTP addresses. See Supporting BOOTP Clients With the DHCP Service (Task Map).
Request to access nonexistent per network database: database-name in datastore: datastore.
Cause: During configuration of the DHCP server, a DHCP network table for a subnet was not created.
Solution: Use DHCP Manager or the pntadm command to create the DHCP network table and new IP addresses. See Adding DHCP Networks.
There is no table-name dhcp-network table for DHCP client's network.
Cause: During configuration of the DHCP server, a DHCP network table for a subnet was not created.
Solution: Use DHCP Manager or the pntadm command to create the DHCP network table and new IP addresses. See Adding DHCP Networks.
Client using non_RFC1048 BOOTP cookie.
Cause: A device on the network is trying to access an unsupported implementation of BOOTP.
Solution: Ignore this message, unless you need to configure this device. If you want to support the device, see Supporting BOOTP Clients With the DHCP Service (Task Map) for more information.