sheeda wrote:
hello everyone,
i am new to netgraph and have been experimenting with few very basic
configurations and facing some issues.
i have got 2 machines, A & C, connected via third machine B with dual nics,
with everything in same subnet.
A <-----> B <-----> C
i have used the bridge script in /usr/share/examples/netgraph and i am
successfully able to ping between A and C.
i did some experiments and getting weird results:
1. i cleaned up the tee node and compiled a pipe node by removing the
lefttoright and righttoleft hooks. once i load the ng_pipe.ko module and place
it between the two ether nodes on lower hooks, i can't ping between A and C. i
even switched the 2 interfaces to promisc mode and disabled the mac auto source
thing through the msg command.
(lnc0)-----(pipe)-----(lnc1)
the ping strangely starts working if i start and stop the bridge script and
then connect my pipe node, even after unloading the ng_bridge module.
I tho9ught that the
the bridge node sent some contol messages to the interfaces it is
connected to but
looking quickly at it, I can;t see that now. (?)..
why not start with a bridge node and simplfy that?
then you could see when it breaks :-)
2. i suspected some issue with my pipe netgraph node, therefore connected the two
ether nodes directly via lower hooks and had the same issue. the A & C starts
communicating again once i start and stop the bridge script and then connect the
lower hooks and set the promisious modes.
(lnc0)----------------(lnc1)
lower
all my 3 machines are freebsd release 3 in vmware. i have even tried setting up
the static arps on A and C but it makes no difference.
another interesting thing i found was that if i shutdown my pipe node, the two
ether nodes connect directly on lower hooks and the ping continues to work.
please let me know if this is all the default behaviour or if i am missing
something.
I think we're missing something..
thanks to everyone for their help in advance.
regards,
sheeda
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