Sending packets over individual slaves of bonded interface

[Philip Molter <philip@corp.texas.net>]

I have a machine with a bonded interface with which I want to use CDP. 
Sending CDP over a bonded interface is pointless (the router just sees 
the same CDP information on all ports), so I have the CDP program (scdp) 
sending the CDPv1 packets out the individual slaves of the bonded 
interface.  This seems to work fine except occasionally, the machine 
will lock up completely when the program runs.  No errors get logged to 
syslog or console.  The box is completely unresponsive.  A power-cycle 
is required to get the box back from the lockup.

This has happened both with TLB and active/passive bonded channels. 
There are 8021q VLANs configured on the bonded interface.  Both slaves 
are e1000 NICs.  The boxe in question is pushing about 150Mbps.

Are there known issues with sending packets out the individual slaves of 
bonded interfaces, slipping them beneath the bonding code?  As far as I 
can tell, CDP doesn't require or get a response packet, so there 
shouldn't be any issues with strange response packets coming back to the 
bonded interface.

The libnet package is used to send the code.  Originally, this code use 
socket(PF_INET, SOCK_PACKET) to send the packet which is deprecated. 
Would this have caused the freeze I've seen?

Any information is appreciated,
Philip
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