On Sun, 2003-03-16 at 06:56, Justin Clacherty wrote: > Hi, > > Should an arp entry be flushed if you are constantly talking to the > hardware pointed to in the arp table? > > I have a problem where my connection is experiencing a 30-45 second > pause every 30 minutes, this pause effectively cuts off an https > connection we have running for a specific application. It seems as > though every 30 minutes there is an arp request to the gateway at our > ISP which is causing the problem, I assume this is because the arp > table is being flushed every 30 minutes. I have tried to fix the > problem (won't know if it is successful until tomorrow) by adding a > manual entry to the arp table with 'arp -s'. I would have thought > that if you had talked to the gateway recently, then the arp entry > would not be flushed, is this correct? Unless something is seriously strange with your network, it shouldn't take more than a few secs to update to arp for a host's address. I haven't looked at the timeouts lately, but entries in the arp table on Linux usually time out faster than 30 minutes. I don't see anything obvious w/sysctl that does indicate the timeout, but I'm pretty certain it's on the order of a few minutes. Wil -- Wil Cooley wcooley@xxxxxxxxxxx Naked Ape Consulting http://nakedape.cc * * * * Linux, UNIX, Networking and Security Solutions * * * * QCSNet http://www.qcsn.com * * * * T1, Frame Relay, DSL, Dial-up, and Web Hosting * * * * * My GPG key recently expired. It's updated on the key * * servers. Please update if you're using GPG/PGP. *
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