It is also how checkpoint firewalls work in a multicast cluster... Except they don't reply to arps with a multicast address... I believe the requirement is that you have to create a static arp entry.
The issue with JUNOS is that a static arp entry (even one with a mutlicast mac address) can only be tied to a single interface... it would be more useful if it could mapped to multiple interfaces or a whole VLAN. Adam C. Greenfield wrote: > On Mon, Jan 19, 2009 at 11:45 AM, Ross Vandegrift <[email protected]> wrote: > >> Maybe there's a use-case I'm not aware of, but when would you want all >> of your active devices to receive all traffic? I'd want each active >> device to receive 1/n of the packets, and so would use something like >> equal-cost routes. >> >> But maybe you have some active-active setup in mind that doesn't split >> the traffic? >> >> > > Not a use case I am quick to defend, but it is worth mentioning that > this appears to be how Windows Server 2008/IIS 7 "clusters" work. The > servers in the cluster reply to ARP queries for the "shared IP" with a > MAC address that is never used to originate traffic - thus causing > traffic to the shared IP to be broadcast to all hosts in the collision > domain because it is never added to layer 2 MAC tables. > > -Adam > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.176 / Virus Database: 270.10.9/1902 - Release Date: 1/19/2009 > 9:37 AM > > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
