Red Hat ENTERPRISE LINUX WS 2.1 - Instalační příručka stáhnout pdf (Strana 196)

196 Troubleshooting TopSpin

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INDEX

/sbin/service dhcpd status

Is the answer like this:

dhcpd (pid <xxxx>) is running

Yes? The DHCP service is running, go to the next step

No? You may have found the problem, the DHCP is not running, start it with the

command

service dhcpd start

To make sure that it will automatically started with the next boot, enter the

command

chkconfig --level 2345 dhcpd on

Now you have to reboot the spectrometer.

6. Did the spectrometer booted successfully?

Yes? You have fixed the problem, the DHCP service is now working correctly.

No? Check the status of the DHCP service once again

/sbin/service dhcpd status

Is the answer like this:

dhcpd (pid <xxxx>) is running

Yes? The DHCP service is running, go to the next step

No? You may have found the problem, the DHCP cannot be started.

Check the files /var/log/messages* for any messages like this:

AUG 16 11:34:50 <name_of_PC> dhcpd: No subnet declaration for eth1 (150.205.205.72).

AUG 16 11:34:50 <name_of_PC> dhcpd: You must write a subnet declaration for this

AUG 16 11:34:50 <name_of_PC> dhcpd: subnet. You cannot prevent the DHCP server

AUG 16 11:34:50 <name_of_PC> dhcpd: from listening on this subnet because your

AUG 16 11:34:50 <name_of_PC> dhcpd: operating system does not support this capability.

This information shows, that the DHCP server listened to the wrong network

card, because the listed IP address is not the spectrometer IP address

(149.236.99.1). To change this do the following:

2. The DHCP service is a standard Linux package. Configuration and if necessary installation is

automatically done with installation of DISKLESS. Only DHCP requests from eth1, the

spectrometer network card are managed by the DHCP process. This configuration is defined

in the file /etc/sysconfig/dhcpd

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Red Hat ENTERPRISE LINUX WS 2.1 - Instalační příručka Strana 196