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[lwip-devel] [bug #31748] etharp_query rerequests too frequently for pen

From: Bill Auerbach
Subject: [lwip-devel] [bug #31748] etharp_query rerequests too frequently for pending entries
Date: Wed, 24 Nov 2010 14:12:03 +0000
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20101026 Firefox/3.6.12 ( .NET CLR 3.5.30729; .NET4.0E)

Follow-up Comment #3, bug #31748 (project lwip):

You could add a member to the ARP table e.g. 'arp_holdoff'.  When an ARP
request is desired, if arp_holdoff is 0, set it and send the packet.  If it's
1, do nothing.  Clear arp_holdoff on each call through etharp_tmr.  Except for
the first miss, ARP replies won't occur more often than ARP_TMR_INTERVAL.  If
the first request is dropped the second one will occur 0 to ARP_TMR_INTERVAL
later which will help a little to shorten the lag on the retry.

It recommends 1 second but using 5 isn't a problem in reality, is it?


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