Hi, On 1 Nov 2010, at 19:20, George Neville-Neil wrote:
> Howdy, > > This is marked as "Updated" because I first proposed this on arch@ but am now > sending it to > a wider audience as I'm hoping to commit it in the near future. > > Please review the following patch against HEAD: > > http://people.freebsd.org/~gnn/head-arpqueue2.diff > > This patch makes two changes to the ARP code: > > 1) It adds a sysctl configurable queue of packets that are held until an ARP > reply is received or > timed out. > > net.link.ether.inet.maxhold > > Having the queue addresses a problem in modern systems where programs that > use connectionless > protocols for communication will suffer from dropping many packets when they > start up or when > an ARP entry moves. > > 2) Makes the time we wait for an arp reply configurable via another sysctl. > > net.link.ether.inet.wait > > The old, pre 8.0, ARP code would run the timer once per second. The new > ARP code sets a timeout of 20 seconds on each entry. Neither value was > specified > in RFC 826. As a matter of fact, RFC 826 had this to say about timeouts: > > "It may be desirable to have table aging and/or timeouts. The > implementation of these is outside the scope of this protocol." > > This new code does not change the default value of either the arpqueue (which > was > always 1 packet) nor does it change the new value of the ARP down timeout. > > I have a different patch for 7, which I will propose after I can get this in > to > HEAD and MFC'd to 8. This looks good to me. Regards, -- Rui Paulo _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[email protected]"
