What snitch are you using? If GPFS you need to enable the prefer_local=true flag (this is automatic on EC2MRS).
2016-08-21 22:24 GMT-03:00 Anuj Wadehra <anujw_2...@yahoo.co.in>: > Hi Paulo, > > I am aware of CASSANDRA-9748. It says that Cassandra only listens at > listen_address and not broadcast_address. To overcome that I can add a NAT > rule to route all traffiic on public IP to private IP. > > But, why preferred IP is set to null in peers table? Whats the expected > value? > > Even if I add a NAT rule as workaround for CASSANDRA-9748, what if my > public interface is down on a node? My traffic would still fail. > > I want that at least nodes in my local DC should contact at each other on > private IP. I thought preferred IP is for that purpose so focussing on > fixing the null value of preferred IPs. > > > Thanks > Anuj > > > On Sun, 21 Aug, 2016 at 7:10 PM, Paulo Motta > <pauloricard...@gmail.com> wrote: > See CASSANDRA-9748, I think it might be related. > > 2016-08-20 15:20 GMT-03:00 Anuj Wadehra <anujw_2...@yahoo.co.in>: > >> Hi, >> >> We use multiple interfaces in multi DC setup.Broadcast address is public >> IP while listen address is private IP. >> >> I dont understand why prefeerred IP in peers table is null for all rows. >> >> There is very little documentation on the role of preferred IP and when >> it is set. As per code TCP connections use preferred IP. According to my >> understanding, nodes in local dc should use preferrably private IP to >> connect and that's referred as preferred IP for a node. >> >> Setup: Cassandra 2.0.14 >> >> Thanks >> Anuj >> >> >> >
