If you want to do a quick test first, you can say
`make few' first, instead.
* Copy send-1.pcap and send-all.pcap to the sending machine.
- * Copy on-dest.sh to the to the receiving machine.
+ * Copy on-dest.sh and monitor.sh to the to the receiving machine.
2. Run the first, small test
* On the receiving machine, say, as root,
- ./on-dest.sh 1
- and leave it running.
+ ./on-dest.sh 1 [-i <interface>]
+ and leave it running. Also, in a nice big window, say
+ ./monitor.sh [-i <interface>]
+ and leave that running too. The default interface is
+ the one that tcpdump picks by default.
* On the sending machine, say, as root,
- tcpreplay -m 1 <send-1.pcap
- The -m 1 option makes tcpreplay send the packets at one a
- second (they are generated as if they were captured at one
- a second); this avoids flooding the network, which causes
- congestion, packet loss and maybe other randomness.
- This will take (by default) 100 seconds.
- * When it has finished, kill on-dest.sh. Copy the
- file recv-1.pcap back to your analysis machine, and
- there say `make analyse' (or `make anal' if you prefer).
+ tcpreplay -m 1 <send-1.pcap [-i <interface>]
+ You should see the results in your monitoring window.
+ This will take (by default) 100 seconds. The -m 1 option
+ makes tcpreplay send the packets at one a second (they are
+ generated as if they were captured at one a second); this
+ avoids flooding the network, which causes congestion,
+ packet loss and maybe other randomness.
+ * When it has finished, kill on-dest.sh and monitor.sh.
+ Copy the file recv-1.pcap back to your analysis machine, and
+ there say `make anal'.
* This will generate `recv-1.log' and `recv-1.diff'.
Read the diff and see if it's by and large working.
See below for information about interpreting the various files.
send-X.why The generator's explanations (ha ha) of
what the test data is
on-dest.sh Script for running tcpdump on the destination
+ to capture the packets as they come in
+ monitor.sh Script for running tcpdump on either end
+ for monitoring how it's going
You really want to be paying attention to the ones where
- X is `1' and `all'. The others, 2 onwards, are all in
- `all' and it'll be easier to take them all at once.
+ X is `1' and `all'. `all' contains all the numbered parts,
+ and it'll be easier to do them all at once.
Those supposedly captured at the destination
recv-X.pcap `pcap' format raw received packets
packet numbers. You can use the numbers marked with `-' to find the
corresponding packet in the other files. Ignore the numbers marked
with `+', they aren't useful. In this case, it's packet 5 that's
-missing. So, we can look in send-1.why or send-rest.why, as
+missing. So, we can look in send-1.why or send-all.why, as
appropriate, and see this:
1 5 tos=0xe7 id=30130 df (!any) proto=icmp[1] \
~ianmdlvl / vinegar-ip.git / blobdiff