CARP or VRRP ?

[Joseph Mack NA3T]

On Thu, 6 Jul 2006, Kristoffer Egefelt wrote:

> Hello,
>
> As the router at our hosting center only updates it's arp 
> tables every 4-hours and don't respond to gratious arp, 
> our failover loadbalancer don't work quite as expected ;)

let us know how you solve it.

> Is there a preffered method, are you using CARP or VRRP or ???.

There isn't a preference for LVS. The differences are 
political not technical. There are patents associated with 
VRRP. Alexandre, the author of VRRP, has done due diligence 
on the matter (as far as I can tell) and says that the 
patents don't affect how it's being used by the GPL people 
and anyhow VRRP is an IETF protocol, free to be implemented 
by anyone.

CARP was written by GPL oriented people who decided it would 
be best not to have anything remotely related to a patent.

I don't know whether one or both are right. They matter will 
not be settled in the time scale that you need to implement 
an LVS. CARP and VRRP do slightly different things, although 
I forget what they are.

Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
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