Date: Tue, 14 Feb 2017 21:29:36 +0100 From: Julien Cigar <julien@perdition.city> To: Freddie Cash <fjwcash@gmail.com> Cc: freebsd-net <freebsd-net@freebsd.org> Subject: Re: carp and subnets Message-ID: <20170214202936.GF6194@mordor.lan> In-Reply-To: <CAOjFWZ7ktnZrgsmoqLzR%2BntTMnO3me3xV124bVBdzz5VcY0LLg@mail.gmail.com> References: <20170214154123.GE6194@mordor.lan> <CAOjFWZ7ktnZrgsmoqLzR%2BntTMnO3me3xV124bVBdzz5VcY0LLg@mail.gmail.com>
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--wtjvnLv0o8UUzur2 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Feb 14, 2017 at 09:03:00AM -0800, Freddie Cash wrote: > On Tue, Feb 14, 2017 at 7:41 AM, Julien Cigar <julien@perdition.city> wro= te: >=20 > > Hello, > > > > I have a redundant router/firewall with CARP and PF/PFSync with the > > following configuration (simplified for example): > > > > on FW1 (MASTER): > > > > ifconfig_em3=3D"inet 1.2.208.89 netmask 255.255.255.224 -tso" > > ifconfig_em3_alias0=3D"vhid 53 advskew 0 pass xx alias 1.2.208.90/32" > > > > on FW2 (BACKUP): > > > > ifconfig_em3=3D"inet 1.2.208.91 netmask 255.255.255.224 -tso" > > ifconfig_em3_alias0=3D"vhid 53 advskew 100 pass xx alias 1.2.208.90/32" > > > > on both machines I have something like this in my /etc/pf.conf: > > net_local=3D"10.209.1.0/24" > > net_prod=3D"192.168.10.0/24" > > if_wan=3D"em3" > > CARPvhid53=3D"1.2.208.90" > > nat on $if_wan from { $net_local, $net_prod } to any -> $CARPvhid53 > > > > it works great but I have a couple of questions: > > > > - is it possible to use differents subnets for the "real" ips and the > > CARP vip ? in other words: I only have three public IPs and I'd like > > to reuse two of them. I wondered of something like this would work: > > > > on FW1 (MASTER): > > > > ifconfig_em3=3D"inet 192.168.88.1 netmask 255.255.255.0 -tso" > > ifconfig_em3_alias0=3D"vhid 53 advskew 0 pass xx alias 1.2.208.90/32" > > > > on FW2 (BACKUP): > > > > ifconfig_em3=3D"inet 192.168.88.2 netmask 255.255.255.0 -tso" > > ifconfig_em3_alias0=3D"vhid 53 advskew 100 pass xx alias 1.2.208.90/32" > > > > (assuming that the switch is configured properly) > > > > - as the state table is synced between FW1 and FW2, is it possible to > > do some load-balancing on the outgoing address? > > > > Thanks! > > >=20 > =E2=80=8BWith FreeBSD 9.x and earlier, no, you can't. The CARP setup use= s the > IP/subnet of the host interface for sending the CARP messages. >=20 > With FreeBSD 10.x and above, yes, you can. The CARP setup uses the > IP/subnet of the VHID for sending CARP messages, which can be set to > anything. So long as all the member VHID interfaces are on the same subn= et > and connection. It's one of the many nice things about the new CARP stuff > on FreeBSD 10.x.=E2=80=8B excellent, thank you! >=20 > --=20 > Freddie Cash > fjwcash@gmail.com --=20 Julien Cigar Belgian Biodiversity Platform (http://www.biodiversity.be) PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 No trees were killed in the creation of this message. However, many electrons were terribly inconvenienced. --wtjvnLv0o8UUzur2 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE7vn2l0to0nV7EWolsrs3EKIEI8AFAlijaKoACgkQsrs3EKIE I8AhxRAAtVW53cC5SjQkIVBR//jiFTBwjLgp+udVaKEmirj6TXtm/WcJc+W2e9EJ +BgJCi5GeOPAfhaCVoRsIAfh38VAKRWC9qEgVOw7WKNYGCOivD37LK8Dr8EuMkaM iOCf0zDUWLduV38u/ki2oV8s1bEtXaSRtmbN3z+bkY50NUh+Uybeli9tc3EfoFM0 CGHGFBJOHmUMpJ6kBEpUJ83ajvAdV6VPztukGNLfdz2gxrTI2q3svv+91yUt50I0 YKMFYlLY3udk5fRXWvTytkey+iDl5eLBF4XH+n+yYmut6+y8iILz3vUV5WpfgsEm VUOZtHkdh98uEqjTMsmWVby4K0dSypMAtccynbjEEnzLkPper2M2zU2bkSSoxrRG /BQEc8ISzqmFGmFYihPV+0iZHOWKaga6+d+DhR3Sk92b6/OHTgzcX0yz8MsbjT2n e+WNqCNvYLCwJGEofWdIHftOarpfFogQXJJFfDCs7Y0Lv2LMqqxk3BvYpmf2ydGE Ep5llBVWCzS8/jVayNnOGWA0V0h3fAUnuZFqgsM7JrVTjl1uzESnUNdFDEgL9vyF P+Sg0Oew7AhSyAaDTmLjnNqszi+trOPkvk+28f5E+BHWJNjH93EuVv6qu6kQPK9q pQ1181XINQwZdoNYDfxFUffEWKmIawVie20g6gIbADAMRnZ4jWE= =xWLf -----END PGP SIGNATURE----- --wtjvnLv0o8UUzur2--
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