To everyone who was at the "office hours" and couldn't get your l3forwarder
working, I'm sorry I couldn't figure out what the problem is.

I've successfully reconfigured my machine to have a working l3-forwarder
again, and this is (so far) what I've learned:

Your ixsys.config, ixsys.config-l3fwdr and your route.config-sys-l3fwdr
should give consistent MAC and IP addresses.

It is okay if your route.config-sys-l3fwdr has routeadd commands that add
interfaces with nonexistant routes, and it is okay if your ixstart
initialization scripts complains about bin/route: Permission denied.

This is the important part, though: You should bring up ALL FOUR interfaces
on your IXP. You should assign IP addresses and subnets to the two
interfaces that you do not use.

The following may or may not help - it is the part of this arcane voodoo
dance I do to have the IXP working for me:
 - It helps to reboot your ixp. If things don't work, and they seem like the
should, reboot the ixp.
 - Do not ping other computers from the IXP.
 - The first packet that the IXP sees should be an ARP request from the
source machine for the IXP.
 - All of your netmasks should be set to 255.255.255.0
 - Do not let Wu anywhere near your computer.



For those who missed the office hours, Wu & I have installed a new sink
machine, so that we don't need to screw with each other's routes to get the
l3 forwarder working.

All groups (except group 8), will now use the new machine (which has no
external interface) as their sink. Group 8 will continue to use "dc".

Your new sink machine's IP address is 10.10X.0.100, where "X" is your group
number. You should edit your scripts accordingly.


--
Francis
francis@{cse.ogi.edu, francischang.com}
OGI School of Science & Engineering at OHSU, SySL Labs
(503) 332-4850          FAX:(503) 748-1553




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