Date: Fri, 25 Jun 2004 18:45:01 +0100 From: Stacey Roberts <stacey@vickiandstacey.com> To: Bill Moran <wmoran@potentialtech.com> Cc: freebsd-questions@freebsd.org Subject: Re: ARP / Cisco Router Wierdness Message-ID: <20040625174500.GM476@crom.vickiandstacey.com> In-Reply-To: <20040625102129.193e041e.wmoran@potentialtech.com> References: <eefbdb7204062507012cc9868e@mail.gmail.com> <20040625102129.193e041e.wmoran@potentialtech.com>
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[-- Attachment #1 --] Hi, ----- Original Message ----- From: "Bill Moran <wmoran@potentialtech.com>" To: To Peter Pauly Date: Fri, 25 Jun, 2004 15:21 BST Subject: Re: ARP / Cisco Router Wierdness > Peter Pauly <ppauly@gmail.com> wrote: > > > This morning while attempting to replace a server with a new machine > > (same IP address, the old machine was unplugged), The Cisco 2600 > > router's arp table continued to point to the old DNS server's MAC > > address. > > > > Even after rebooting the new server (Freebsd 5.2.1), the MAC address > > remained unchanged in the router. The router continued to point to the > > old machine's MAC address. > > > > I updated the entry manually in the router and all was well. But I am > > concerned that Freebsd is not announcing it's MAC address when the > > machine or interface comes up. Any ideas? Cisco routers (depending on IOS version) will cache arp entries for at least 20 mins. To force an update, simply run "clear arp" on the router and any Cisco IOS-based switches as well. Regards, Stacey > > I'm not an ARP expert, but isn't it the job of the device maintaining an > ARP table to properly time out and refresh the entries in that table? > > I.e. shouldn't you be posting this question to a Cisco mailing list, > asking why the 2600 didn't automatically pick up the new MAC address? > > Corrections are welcome if I'm wrong on this count. > > -- > Bill Moran > Potential Technologies > http://www.potentialtech.com > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: PGP 6.5.8 iQEVAwUBQNxkmudvY+8mWFvRAQHkbQf/aalL8KX1vNJ3NtKbMeNHrKzAAqEiIEAe XY7WxckeqbzjAI/5Iqd+JXCMEMax5lBghElIEbeVznVfgvk0X/fT63i4tDsTgQQJ KegIDv5Bhdbf67gTQNF+L0+Dd3mjJ2yMMSaHt5fcgR5/bbdm/wIZPG2ZgW0PXTs2 7mp79gp0jH2hDvac04sMp1VKWmoZx71Vrq4rxDamaHspCN+g1u6odUoKoiSDbg8S soWlOkNbmhJ0kxH8WDtFomzTaUWJlyQG2pOxCYNWvyx1t+BU9fOZ+UEKwJu2NyBj f+CTUCzlOH5fBQw+fOQ42bXrWpVB3v9zPiD2tcC8GgJKkH87N+iTAA== =doy9 -----END PGP SIGNATURE-----help
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