From mboxrd@z Thu Jan 1 00:00:00 1970 From: sabat Date: Thu, 12 Dec 2002 23:05:42 +0000 Subject: Re: [LARTC] VRRPD (rfc2338) MIME-Version: 1 Content-Type: multipart/mixed; boundary="------------060600040500000909030803" Message-Id: List-Id: References: In-Reply-To: To: lartc@vger.kernel.org --------------060600040500000909030803 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Dmitry Golubev wrote: >But as far as I know, there is no VRRP implementations that fully comply >with rfc2338 as it requires multiple MAC addresses for the one poor linux >box's interface. Maybe, someone can suggest a working solution of this >problem? > Yes, there is a way -- the VLAN code in the linux kernel supports setting the MAC address of virtual interfaces (eth0.5, for instance). AFAIC, this is much superior (in concept) to multicast MACs, given the Cisco problem. > >I have seen one idea, but haven't tested it yet (hope someone can try it out): > >To bridge the physical iface with TAP on which the vrrpd (or keepalived) is >running. In that case we could make the VRRP-router that fully comply with RFC. > >For more info see: http://www.math.leidenuniv.nl/pipermail/bridge/2002-June/002021.html > >BR, Dmitry > >======= At 2002-12-11, 03:56:00 you wrote: ======= > > > >>The daemon at http://www.keepalived.org/ is the VRRPd implementation >>that's supposed to be the best. It's actually part of the Linux Virtual >>Server project (layer 4 load balancer), but the author claims you should >>be able to use it as a pure VRRP daemon -- although when I've read the >>doc, I couldn't figure out how. (But don't be discouraged by my >>impatience. :) It's supposed to be the most mature and ready-for-production. >> >>There's also Jerome Etienne's reference implementation (don't have a >>URL, but it's easy to Google). However, I've heard from more than place >>that this is too proof-of-concept and perhaps not production-worthy. >>Here's a link to a paper about running VRRPd as the hotspare protocol >>for linux firewalls (uses Jerome Etienne's implementation): >>http://www.gnusec.com/resource/security/docs/HAFirewallLinux-VRRP.pdf. >> >>BTW, keep in mind that if you intend to use VRRP in an environment with >>Cisco routers, you'll need to do some work on them too. Cisco routers do >>not accept multicast MAC addresses as legit ARP replies by default. >>Unfortunately, the VRRP RFC and all implementations use multicast MACs. >>What that means is that you'll need to either 1) turn the switch on the >>Cisco routers that makes them accept multicast MAC ARP replies (good), >>or 2) put a static ARP entry in the Cisco routers for the VRRP multicast >>MACs (better). >> >>Hope that helps. >> >>-S >> >> >>Anton Tinchev wrote: >> >> >> >>>Can someone point me for good VRRPD (rfc2338) implementation on linux. >>>Some stable and live project >>>Thanks >>> >>>_______________________________________________ >>>LARTC mailing list / LARTC@mailman.ds9a.nl >>>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ >>> >>> >>> >>> >>_______________________________________________ >>LARTC mailing list / LARTC@mailman.ds9a.nl >>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ >> >> > > > > > >_______________________________________________ >LARTC mailing list / LARTC@mailman.ds9a.nl >http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ > > --------------060600040500000909030803 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Dmitry Golubev wrote:

But as far as I know, there is no VRRP implementations that fully comply
with rfc2338 as it requires multiple MAC addresses for the one poor linux
box's interface. Maybe, someone can suggest a working solution of this
problem?

Yes, there is a way -- the VLAN code in the linux kernel supports setting the MAC address of virtual interfaces (eth0.5, for instance). AFAIC, this is much superior (in concept) to multicast MACs, given the Cisco problem.


I have seen one idea, but haven't tested it yet (hope someone can try it out):

To bridge the physical iface with TAP on which the vrrpd (or keepalived) is
running. In that case we could make the VRRP-router that fully comply with RFC.

For more info see: http://www.math.leidenuniv.nl/pipermail/bridge/2002-June/002021.html

BR, Dmitry

======= At 2002-12-11, 03:56:00 you wrote: =======

The daemon at http://www.keepalived.org/ is the VRRPd implementation 
that's supposed to be the best. It's actually part of the Linux Virtual 
Server project (layer 4 load balancer), but the author claims you should 
be able to use it as a pure VRRP daemon -- although when I've read the 
doc, I couldn't figure out how. (But don't be discouraged by my 
impatience. :) It's supposed to be the most mature and ready-for-production.

There's also Jerome Etienne's reference implementation (don't have a 
URL, but it's easy to Google). However, I've heard from more than place 
that this is too proof-of-concept and perhaps not production-worthy. 
Here's a link to a paper about running VRRPd as the hotspare protocol 
for linux firewalls (uses Jerome Etienne's implementation): 
http://www.gnusec.com/resource/security/docs/HAFirewallLinux-VRRP.pdf.

BTW, keep in mind that if you intend to use VRRP in an environment with 
Cisco routers, you'll need to do some work on them too. Cisco routers do 
not accept multicast MAC addresses as legit ARP replies by default. 
Unfortunately, the VRRP RFC and all implementations use multicast MACs. 
What that means is that you'll need to either 1) turn the switch on the 
Cisco routers that makes them accept multicast MAC ARP replies (good), 
or 2) put a static ARP entry in the Cisco routers for the VRRP multicast 
MACs (better).

Hope that helps.

-S


Anton Tinchev wrote:

Can someone point me for good VRRPD (rfc2338) implementation on linux.
Some stable and live project
Thanks

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/


			



_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

--------------060600040500000909030803-- _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/