Date: Fri, 19 Jan 1996 15:11:24 PST From: Bill Fenner <fenner@parc.xerox.com> To: Nate Williams <nate@sri.mt.net> Cc: "Garrett A. Wollman" <wollman@lcs.mit.edu>, current@freebsd.org Subject: Re: pppd route/proxy problem Message-ID: <96Jan19.151128pst.177478@crevenia.parc.xerox.com> In-Reply-To: Your message of "Fri, 19 Jan 1996 11:30:56 PST." <199601191930.MAA15955@rocky.sri.MT.net>
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In message <199601191930.MAA15955@rocky.sri.MT.net> Nate wrote: >Garrett: >> If they are negative, they should have already expired. The kernel >> actually stores an explicit expiration time, and the `route' and >> `netstat' programs subtract the current time for you. Unresolved arp entries use the expiration time to store the last time that an ARP request was sent. There is a timer that goes off every 5 minutes and removes all unresolved ARP entries (apparently including those that were just created). So, the timer for an unresolved ARP will generally be negative. (It could be a small positive number, which along with the RTF_REJECT flag indicates that the kernel is trying to avoid flooding the net with ARP requests) (e.g. there's no way to know when an unresolved ARP request is going to disappear from the routing table, other than "probably in less than 5 minutes".) Bill
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