Thread (21 messages) 21 messages, 11 authors, 2007-03-07

Re: [RFC] ARP notify option

From: Stephen Hemminger <hidden>
Date: 2007-03-06 22:54:10
Also in: lkml, virtualization, xen-devel

On Tue, 06 Mar 2007 15:18:07 -0600
"Chris Friesen" [off-list ref] wrote:
Stephen Hemminger wrote:
quoted
+arp_notify - BOOLEAN
+	Define mode for notification of address and device changes.
+	0 - (default): do nothing
+	1 - Generate gratuitous arp replies when device is brought up
+	    or hardware address changes.
Did you consider using gratuitous arp requests instead?  I remember 
reading about some hardware that updated its arp cache on gratuitous 
requests but not gratuitous replies.

Chris
I copied the ARP generation from other places that were doing
gratuitous ARP already:  Xen and irlan.
Our local switch used REPLY's to do the same thing.

One could imagine making it a ternary value and having 2 generate
REQUEST's.


-- 
Stephen Hemminger [off-list ref]
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