301 lines
5.9 KiB
HTML
301 lines
5.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Trouble Shooting</TITLE
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="CompaqT1500-Linux HOWTO"
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HREF="index.html"><LINK
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HREF="x176.html"></HEAD
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>CompaqT1500-Linux HOWTO</TH
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><DIV
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><H1
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CLASS="SECT1"
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><A
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NAME="AEN153"
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></A
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>7. Trouble Shooting</H1
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><P
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>The servers log file (/var/log/messages) should contain hints as to where you've
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got to in the boot process, as it should log TFTP transfers, NFS mounts etc.
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If not, add</P
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><TABLE
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BORDER="1"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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COLOR="#000000"
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><PRE
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CLASS="SCREEN"
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>*.* /var/log/messages</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><P
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> to</P
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><TABLE
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BORDER="1"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><PRE
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CLASS="SCREEN"
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>/etc/syslogd.conf</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><P
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>and restart syslog</P
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><P
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>tcpdump allows you to see what packets are being transfered, and their NFS
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filenames.</P
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><TABLE
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BORDER="1"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TD
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><FONT
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><PRE
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CLASS="SCREEN"
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> tcpdump -i eth0 -s 500 host box</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><P
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>Your output from syslog should resemble:</P
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><TABLE
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BORDER="1"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><PRE
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CLASS="SCREEN"
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>Jul 24 21:37:00 bookcase dhcpd: DHCPDISCOVER from 00:80:64:10:1d:1c via eth0
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Jul 24 21:37:00 bookcase dhcpd: DHCPOFFER on 192.168.1.52 to 00:80:64:10:1d:1c via eth0
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Jul 24 21:37:04 bookcase dhcpd: DHCPREQUEST for 192.168.1.52 from 00:80:64:10:1d:1c via eth0
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Jul 24 21:37:04 bookcase dhcpd: DHCPACK on 192.168.1.52 to 00:80:64:10:1d:1c via eth0
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Jul 24 21:37:04 bookcase tftpd[5003]: tftpd: trying to get file: /exports/T1500/tftpboot/vmlinux
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Jul 24 21:37:24 bookcase mountd[4853]: authenticated mount request from box:600</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><P
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>Your tcpdump output should look like (when idle):</P
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><TABLE
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BORDER="1"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="SCREEN"
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>17:31:41.450000 box.8022008 > bookcase.nfs: 116 lookup fh Unknown/1 "initctl"
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17:31:41.450000 bookcase.nfs > box.8022008: reply ok 128 lookup fh Unknown/1</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN166"
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></A
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>7.1. Intermittent kernel transfer problems (NFS null)</H2
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><P
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>There is a known problem which occasionally causes the T1500 to fail to reboot,
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apparently because it fails to tftp the kernel after the reboot. A tcpdump of
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this happening will resemble:</P
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><TABLE
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BORDER="1"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="SCREEN"
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>12:04:38.506153 box.2049 > bookcase.house.tftp: 39 RRQ "/exports/T1500/tftpboot/vmlinux"
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12:04:38.556153 bookcase.house.1199 > box.2049: udp 516
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12:04:38.556153 box.2049 > bookcase.house.1199: udp 4
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12:04:38.556153 bookcase.house.196610 > box.nfs: 516 null
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12:04:38.556153 box.2049 > bookcase.house.1199: udp 4
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12:04:38.556153 bookcase.house.196611 > box.nfs: 516 null
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12:04:38.556153 box.2049 > bookcase.house.1199: udp 4
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12:04:38.556153 bookcase.house.196612 > box.nfs: 516 null
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12:04:38.556153 box.2049 > bookcase.house.1199: udp 4
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12:04:38.566153 bookcase.house.196613 > box.nfs: 516 null
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12:04:38.566153 box.2049 > bookcase.house.1199: udp 4
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12:04:38.566153 bookcase.house.196614 > box.nfs: 516 null
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12:04:38.566153 box.2049 > bookcase.house.1199: udp 4
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12:04:38.566153 bookcase.house.196615 > box.nfs: 516 null</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><P
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>You will then see a syslog entry from tftp indicating that it is sending the
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kernel, but no packets are exchanged. ARP requests go unanswered.</P
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><P
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>This can be resolved, but if you have your T1500 headless in a corner, is a
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PITA.
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Connect a monitor, keyboard and PS/2 mouse if not present.
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Reboot the T1500, and press 'L' after the 1st beep.
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The T1500 will now boot locally. Change the boot mode to 'Local' (Start->System
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menu) and reboot.
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Change the boot mode back to 'Network'</P
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><P
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>If this happens to you a lot, please try out tiggers-magic-tftpd. You can find this
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at the same URL this document gives as the current home of the T1500 HOWTO. It requires python,
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and has been reported to solve the problem. Please let me know how you get on !</P
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></DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN173"
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></A
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>7.2. T1500 ignores DHCP OFFER and just asks again</H2
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><P
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>There is a bug in the BIOS, all DHCP packets must contain a 'root-path' option, even
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if you are booting your own kernel which doesn't need one.</P
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