Subject: Re: CARP Committed (correctly presented)
To: Liam J. Foy <>
From: Herb Peyerl <>
List: current-users
Date: 05/18/2006 10:03:58
On 18-May-06, at 9:57 AM, Liam J. Foy wrote:
> CARP works by allowing a group of hosts on the same network segment to
> share an IP address. This group of hosts is referred to as a
> "redundancy group". The redundancy group is assigned an IP Address
> that is shared amongst the group members. Within the group, one host
> is designated the "master" and the rest as "backups". The master host
> is the one that currently "holds" the shared IP; it responds to any
> traffic or ARP requests directed towards it. Each host may belong
> to more than one redundancy group at a time.

Does CARP use the same gratuitous ARP method of transitioning from  
Slave to Master that keepalived uses?  If so, it has the same  
weaknesses as keepalived and isn't really all that useful...

(Many switches/routers ignore gratuitous ARP's and hence, you have to  
wait for an ARP timeout before a new Master receives any packets).