[j-nsp] j-series and clusterip / multicast mac addresses

[Chuck Anderson]

On Tue, May 06, 2008 at 04:55:12PM -0400, seph wrote:
> I'm playing with linux's ClusterIP behind a couple of j2320 routers. It
> works by having several machines share an ip address using a multicast
> mac address. However, my j2320's don't seem to like it.
> 
> tcpdump shows they as sending an arp request, and ignoring the arp
> response. If I statically assign an arp entry, things do work, but I need
> to dynamically learn them. I don't think I have multicast enabled, but
> when I tried enabling it I saw the same behavior.
> 
> Currently running junos 9.0r2. 
> 
> Anyone have advice on how to do this?

How about using an anycast IP address assigned to the loopback 
interfaces of the cluster systems and run a routing protocol between 
the cluster nodes and the router.