Date: Thu, 6 Mar 2008 14:19:54 -0800 From: Christopher Cowart <ccowart@rescomp.berkeley.edu> To: freebsd-net@freebsd.org Subject: Load Balancing with CARP Message-ID: <20080306221954.GN30324@hal.rescomp.berkeley.edu>
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--PZYVFYZbFYjzBslI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello, I followed the instructions in carp(4) and set up a load balancing and failover configuration on vlan interfaces -- it's working fine (as long as I don't `ifconfig carp25 destroy'...). In order to really make use of this functionality, I need a user land method of figuring out whether a MAC address is coming to the local host as the primary or secondary. In other words, let's say I have two clients: IP MAC =2E10 :0a =2E11 :0b And two VHIDs for the virtual router interface (IP .1): VHID MAC 1 :01 2 :02 Router 1 has VHID 1 primary, VHID 2 backup. Router 2 has VHID 2 primary, VHID 1 backup.=20 How can I find out which VHID the sending MAC address hashes to?=20 For example: | which_vhid :0a | 1 | which_vhid :0b | 2 After poking around, the only thing I can figure is reproduce the hash function from the source code myself. I really don't want to do that if there's another way. Thanks, --=20 Chris Cowart Network Technical Lead Network & Infrastructure Services, RSSP-IT UC Berkeley --PZYVFYZbFYjzBslI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iQIVAwUBR9BuCSPHEDszU3zYAQIiLRAAn7xPbHP4Mj9NssOHGQbtdmR6j76voNYo TiMsFR7ir0DSv42M/EqR8ngBjRz1TrZCHtdHgaR2/+MDhMfMLarueGoBqIhFuphp SSMybH9jl2klntdHfcALQp36OzfBpNFu5iEv5jvby5j03BtVQyWXoEaQEfBaci6+ txCrbOCe35j1vUbeNZ5r6lHRy+vnEFblMQ0wmidkAgIy5T/7UJKCb7NW8l+mM20H ormAkjXqWX/JxDNrW7sDRUGpgYaokQ2g8hKX3e2CI3GxV+MOOWQTcplz8k9kd2lr 7dm4mB+2ZSJrTCn3fRwaz9EakW49GYmJFeDZWCB8/Hj3IN/BHi/6UuUPVC5denT9 +KUljhCMo1P0OVjJmG7RbddRon9jTwQV3LJ9+2DoqJ7HsL5ZYMbLxLvS5i0Zf/ek qH5SbHZtsyM8xjxPmrikM4RMI3j29hhN8L3zqVynanamBvRBGPf6vcswJ01a8iv8 Mgpf1sm0Vs/7tZsGyooXylX5Idg4UOC+e256XIkdd//TXI4iwbb2eulG1ywbMgNN y9O7m848ddnlSh0CC17hZ8Xv+b29AVKtPVZGrI+Eo529Y2uG6MdZq9PSo//FdOAM 1EJ482u5i6pZy2QZNCGGG0ywYKKJLwo422IjQbNpYza+jmZfBX1LjhlsLbzQakIz fFkLFtehldE= =Kfhl -----END PGP SIGNATURE----- --PZYVFYZbFYjzBslI--
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