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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--fDERRRNgB4on1jOB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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: >=20 > > 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. > >=20 > > 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. > >=20 > > 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 leas= t 20 mins. To force an update, simply run "clear arp" on the router and any= Cisco IOS-based switches as well. Regards, Stacey >=20 > 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? >=20 > 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? >=20 > Corrections are welcome if I'm wrong on this count. >=20 > --=20 > 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.o= rg" --fDERRRNgB4on1jOB Content-Type: application/pgp-signature Content-Disposition: inline -----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----- --fDERRRNgB4on1jOB--
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