# Unicast discovery options? **URL:** \ **Category:** Elasticsearch\ **Created:** [February 26, 2012, 4:54pm UTC](https://discuss.elastic.co/t/unicast-discovery-options/6812 "2012-02-26T16:54:18Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![project2501](https://avatars.discourse-cdn.com/v4/letter/p/41988e/32.png) [@project2501](https://discuss.elastic.co/u/project2501)\ **Post date:** [February 26, 2012, 4:54pm UTC](https://discuss.elastic.co/t/unicast-discovery-options/6812/1 "2012-02-26T16:54:18Z")
Hi, I've hunted through the guides and group but can't seem to get unicast discovery to work. I run ES on one server with no options. On a second server I run: bin/elasticsearch -Ddiscovery.zen.ping.unicast.enabled=true - Ddiscovery.zen.ping.unicast.hosts=["192.168.0.7"] Is this right? I get various results. Sometimes exception in the master log. Sometimes nothing at all. thanks! ---
**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\ **Post date:** [February 26, 2012, 7:52pm UTC](https://discuss.elastic.co/t/unicast-discovery-options/6812/2 "2012-02-26T19:52:27Z")
You need to prefix the settings if provided using -D using es, for example, -Des.discovery.zen.ping…. . I don't know where you found the unicast.enabled flag in the docs… . Here are the settings to configure unicast: [https://github.com/elasticsearch/elasticsearch/blob/master/config/elasticsearch.yml#L313](https://github.com/elasticsearch/elasticsearch/blob/master/config/elasticsearch.yml#L313). On Sunday, February 26, 2012 at 6:54 PM, project2501 wrote: > Hi, > I've hunted through the guides and group but can't seem to get > unicast discovery to work. > > I run ES on one server with no options. > > On a second server I run: > bin/elasticsearch -Ddiscovery.zen.ping.unicast.enabled=true - > Ddiscovery.zen.ping.unicast.hosts=["192.168.0.7"] > > Is this right? > I get various results. Sometimes exception in the master log. > Sometimes nothing at all. > > thanks! ---
**Author:** ![project2501](https://avatars.discourse-cdn.com/v4/letter/p/41988e/32.png) [@project2501](https://discuss.elastic.co/u/project2501)\ **Post date:** [February 26, 2012, 8:10pm UTC](https://discuss.elastic.co/t/unicast-discovery-options/6812/3 "2012-02-26T20:10:18Z")
Thanks for the quick reply Shay. It works now. Oh, I guess I 'made up' the unicast.enabled property. Probably deduced it. Silly me. On Feb 26, 2:52 pm, Shay Banon [kim...@gmail.com](mailto:kim...@gmail.com) wrote: > You need to prefix the settings if provided using -D using es, for example, -Des.discovery.zen.ping…. . I don't know where you found the unicast.enabled flag in the docs… . Here are the settings to configure unicast:[https://github.com/elasticsearch/elasticsearch/blob/master/config/ela](https://github.com/elasticsearch/elasticsearch/blob/master/config/ela).... > > On Sunday, February 26, 2012 at 6:54 PM, project2501 wrote: > > > Hi, > > I've hunted through the guides and group but can't seem to get > > unicast discovery to work. > > > I run ES on one server with no options. > > > On a second server I run: > > bin/elasticsearch -Ddiscovery.zen.ping.unicast.enabled=true - > > Ddiscovery.zen.ping.unicast.hosts=["192.168.0.7"] > > > Is this right? > > I get various results. Sometimes exception in the master log. > > Sometimes nothing at all. > > > thanks! ---
**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\ **Post date:** [February 26, 2012, 8:42pm UTC](https://discuss.elastic.co/t/unicast-discovery-options/6812/4 "2012-02-26T20:42:07Z")
Cool 🙂 On Sunday, February 26, 2012 at 10:10 PM, project2501 wrote: > Thanks for the quick reply Shay. It works now. > > Oh, I guess I 'made up' the unicast.enabled property. Probably deduced > it. Silly me. > > On Feb 26, 2:52 pm, Shay Banon \<[kim...@gmail.com](mailto:kim...@gmail.com) ([http://gmail.com](http://gmail.com))\> wrote: > > > You need to prefix the settings if provided using -D using es, for example, -Des.discovery.zen.ping…. . I don't know where you found the unicast.enabled flag in the docs… . Here are the settings to configure unicast:[https://github.com/elasticsearch/elasticsearch/blob/master/config/ela](https://github.com/elasticsearch/elasticsearch/blob/master/config/ela).... > > > > On Sunday, February 26, 2012 at 6:54 PM, project2501 wrote: > > > > > Hi, > > > I've hunted through the guides and group but can't seem to get > > > unicast discovery to work. > > > > > I run ES on one server with no options. > > > > > On a second server I run: > > > bin/elasticsearch -Ddiscovery.zen.ping.unicast.enabled=true - > > > Ddiscovery.zen.ping.unicast.hosts=["192.168.0.7"] > > > > > Is this right? > > > I get various results. Sometimes exception in the master log. > > > Sometimes nothing at all. > > > > > thanks! ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 3:38am UTC](https://discuss.elastic.co/t/unicast-discovery-options/6812/5 "2017-07-06T03:38:10Z")