287 lines
4.6 KiB
HTML
287 lines
4.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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>Troubleshooting autodiscovery</TITLE
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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TITLE="Autodiscovery"
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TITLE="Compiling auto-discovering"
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>The openMosix HOWTO: </TH
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>Chapter 5. Autodiscovery</TD
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><A
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NAME="AEN492"
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>5.3. Troubleshooting autodiscovery</H1
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><P
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>Sometimes however autodiscovery does not function as you would like,
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for example a node might not see multicast traffic from other nodes.
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This has occurred with some
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PCMCIA ethernet drivers. One solution is to place the interface in
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promiscuous and or multicast mode as detailed below:
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<TABLE
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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="PROGRAMLISTING"
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>Aug 31 20:45:58 localhost kernel: openMosix configuration changed: This is openMosix #98 (of 1 configured)
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Aug 31 20:45:58 localhost kernel: openMosix #98 is at IP address 10.0.0.98Aug 31 20:45:58 localhost omdiscd[1627]: Notified kernel to activate
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openMosix Aug 31 20:45:58 localhost kernel: Received an unauthorized information request from 10.0.0.99</PRE
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></FONT
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></TD
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></TABLE
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>
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What you should to then is try to force your NIC
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into promiscuous and/
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or multicast mode
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manually.
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<TABLE
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BORDER="0"
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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="PROGRAMLISTING"
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>ifconfig ethx promisc
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or
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ifconfig ethx multicast </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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>
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You might also want to run
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<TABLE
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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="PROGRAMLISTING"
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>tcpdump -i eth0 ether multicast </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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>
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which will have the same effect but you will now also be able to see the
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packages yourself. </P
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><P
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>On some Layer 3 switches you other configs might be required.
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An openMosix user
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found out that on his Switch Summit48Si (Extreme Networks) he had to run
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<TABLE
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BORDER="0"
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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="PROGRAMLISTING"
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>disable ipmcforwarding (to deactivate the routing of multicast paquets)
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disable igmp snooping</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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>
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before he was the different omdiscd's were able to see eachother, other switches might require similar configs.</P
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><P
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> <TABLE
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BORDER="0"
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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="PROGRAMLISTING"
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>Aug 31 22:14:43 inspon omdiscd[1422]: Simulated notification to activate openMosix
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[root@inspon root]# showmap
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My Node-Id: 0x0063
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Base Node-Id Address Count
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------------ ---------------- -----
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0x0063 10.0.0.99 1
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[root@inspon root]# /etc/init.d/openmosix status
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OpenMosix is currently disabled
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[root@inspon root]# </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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>
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If you see the <EM
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>simulated</EM
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> you have probably forgotten
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to put the
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<TABLE
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BORDER="0"
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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="PROGRAMLISTING"
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>#define ALPHA</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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>
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in comment.</P
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><P
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>I have also noticed that autodiscovery does not work with FireWire
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based network cards.</P
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></DIV
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>Compiling auto-discovering</TD
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