Hello, On Tue, 30 Jun 2015, Phillip Moore wrote:
> Has any thought been giving to making the multicast address IPVS sync > daemons use to sync state be configurable? > > 224.0.0.81 is in the link local multicast subnet. Our hope is to have > the IPVS directors be distributed in multiple L3 networks so the > multicast traffic would have to be routed between them. This wouldn't > be a problem except for the choice of this link-local subnet is > treated specially by network vendors. Routing devices do not want to > route this and according to my network folks it would cause it to hit > the control plane and cause excessive usage on the routers where an > alternate multicast subnet would not. > > Looking at the code it would appear some what trivial to change this > to a proc setting but I do not know the context or history of the > choice behind 224.0.0.81 as the address to be hard coded. > Interestingly the IANA assignments document shows the .81 address as > being in a reserved range. > > Our configuration idea is to have a small pool of directors all acting > as master and backup (running both daemons). We will anycast with > BGP/exabgp the VIP addresses to live on all of the directors which > would live on several subnets. > > I appreciate any thoughts or feedback on this idea or experiences with > using the existing address at scale. I planned a change for sync code to configure message size. But waited the merge window, so I can try this weekend to implement also this feature: IP, PORT, TTL, the 224.0.0.81:8848/1 being default. As Simon suggests, may be with new attributes for the IPVS_CMD_ATTR_DAEMON message. I can try it to support IPv6 too. Regards -- Julian Anastasov <j...@ssi.bg> _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users