[Xorp-users] Click configuration generator on XORP

[Pavlin Radoslavov]

> I was taking a look at the configuration file generated by XORP to be 
> used in Click and there is a point that I didn't really understand.
> 
> Whenever an interface receives an ARP Reply, makes n+1 copies of it 
> (through the Tee element) and send one copy for each of the n interfaces 
> (in fact to their ARPQuerier element) and 1 copy to the host (in the 
> case that click is running in user-level, this last ARP reply is 
> discarded).
> 
> Why does an ARP reply need to be sent to the ARPQuerier of other 
> interfaces? Is there any case where a packet may be waiting an ARP reply 
> to be sent through an interface and this ARP reply comes from another 
> interface? Am I missing something?

Rafael,

FYI, the Click config generated by XORP is based on the config
generated by the click/conf/make-ip-conf.pl script (from the Click
distribution). Sorry, I don't know why that Click config looks
the way it is, but you may try to ask on the Click mailing list.

Regards,
Pavlin