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protocol="application/pgp-signature"; micalg=pgp-sha1; boundary="Boundary-02=_dzkIBk+OTycKTCZ"; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200408172022.21707.max@love2party.net> X-Provags-ID: kundenserver.de abuse@kundenserver.de auth:61c499deaeeba3ba5be80f48ecc83056 X-Virus-Scanned: by amavisd-new at freelists.org X-archive-position: 419 X-ecartis-version: Ecartis v1.0.0 Sender: pf4freebsd-bounce@freelists.org Errors-To: pf4freebsd-bounce@freelists.org X-original-sender: max@love2party.net Precedence: normal X-list: pf4freebsd X-Virus-Scanned: by amavisd-new at freelists.org X-Provags-Forward: max@love2party.net -> max.laier@stud.uni-karlsruhe.de X-Scan-Signature: 6198218f210d7863a7356148e8ac65da X-Spam-Checker-Version: SpamAssassin 2.61 (1.212.2.1-2003-12-09-exp) on mail6.rz.uni-karlsruhe.de X-Spam-Status: No, hits=-4.9 required=7.0 tests=BAYES_00 autolearn=no version=2.61 X-Spam-Level: X-UID: 525 X-Length: 6493 X-Mailman-Approved-At: Thu, 16 Sep 2004 04:12:49 +0000 Subject: [pf4freebsd] Re: why multiple CARP groups X-BeenThere: freebsd-pf@freebsd.org X-Mailman-Version: 2.1.1 Reply-To: pf4freebsd@freelists.org List-Id: Technical discussion and general questions about packet filter (pf) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Thu, 16 Sep 2004 04:12:36 -0000 X-Original-Date: Tue, 17 Aug 2004 20:22:20 +0200 X-List-Received-Date: Thu, 16 Sep 2004 04:12:36 -0000 --Boundary-02=_dzkIBk+OTycKTCZ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tuesday 17 August 2004 10:58, sam wrote: > Hi, > > I need to get adviced by someone for the usage of CARP+pfsync. > With the BIG example as described in the following page: > http://www.countersiege.com/doc/pfsync-carp/#big > I don't understand why create a different CARP group for each > application server instead of using only one CARP interface for 4 > internal application servers is better. > > With only one CARP address for 4 application servers, traffic still can > be redirected to another app server if one is died. Unless one CARP > address is not efficient. > > Can anyone please explain the difference using multiple CARP groups > instead of one CARP address? The example uses a "rdr source-hash" rule to load balance over the four=20 virtual addresses. You cannot use the CARP version of source-hash as the=20 clients are behind the firewalls and will not balance as a result. If one server dies one of the remaining 3 takes over and has to take twice = the=20 load until the failed server comes back (or the admin modifies the rdr rule= ). =2D-=20 /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News --Boundary-02=_dzkIBk+OTycKTCZ Content-Type: application/pgp-signature Content-Description: signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (FreeBSD) iD8DBQBBIkzdXyyEoT62BG0RAm4eAJ4h2cRFo0uNmsl5qaWEU4uJlL8xlQCeOxko 8zUqdOCMPCTC9IuvQUX3Nyc= =QT/v -----END PGP SIGNATURE----- --Boundary-02=_dzkIBk+OTycKTCZ--