# Endpoint Address in OPC-UA settings in cas of redundant GW

**URL:** <https://forum.inductiveautomation.com/t/endpoint-address-in-opc-ua-settings-in-cas-of-redundant-gw/10584>\
**Category:** Ignition\
**Created:** [October 6, 2015, 4:17pm UTC](https://forum.inductiveautomation.com/t/endpoint-address-in-opc-ua-settings-in-cas-of-redundant-gw/10584 "2015-10-06T16:17:33Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\
**Post date:** [October 6, 2015, 4:17pm UTC](https://forum.inductiveautomation.com/t/endpoint-address-in-opc-ua-settings-in-cas-of-redundant-gw/10584/1 "2015-10-06T16:17:33Z")

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I have 2 gateway with redundancy, what is the value of the Endpoint Address in OPC-UA settings ? Can I set a different IP address for each gateway ???  
alias in host file don’t work !

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**Author:** ![greg.simpson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/greg.simpson/32/3135_2.png) [@greg.simpson](https://forum.inductiveautomation.com/u/greg.simpson)\
**Post date:** [October 6, 2015, 4:54pm UTC](https://forum.inductiveautomation.com/t/endpoint-address-in-opc-ua-settings-in-cas-of-redundant-gw/10584/2 "2015-10-06T16:54:19Z")

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You can use localhost for now. It should work fine. I spoke with the developer about this briefly not to long ago and it was said that we probably need to find a better solution to this. I have had other customers in the past use localhost without issue. In redundancy the endpoint address is synced from the master to the backup. If this happens then you will most likely end up with a faulted OPC UA server on the backup because the endpoint is incorrect.

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**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\
**Post date:** [October 6, 2015, 9:26pm UTC](https://forum.inductiveautomation.com/t/endpoint-address-in-opc-ua-settings-in-cas-of-redundant-gw/10584/3 "2015-10-06T21:26:27Z")

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with localhost or 127.0.0.1, it works but there is a log error:

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/8/8cb611849dea6d347fb022e328df8d1131b42a8e.jpg)

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<div class="post-metadata">

**Author:** ![greg.simpson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/greg.simpson/32/3135_2.png) [@greg.simpson](https://forum.inductiveautomation.com/u/greg.simpson)\
**Post date:** [October 7, 2015, 5:30pm UTC](https://forum.inductiveautomation.com/t/endpoint-address-in-opc-ua-settings-in-cas-of-redundant-gw/10584/4 "2015-10-07T17:30:48Z")

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I spoke with the developer and the error message is unrelated. The warning is obviously related to using localhost. However, the server should still work.

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**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\
**Post date:** [November 8, 2015, 6:44am UTC](https://forum.inductiveautomation.com/t/endpoint-address-in-opc-ua-settings-in-cas-of-redundant-gw/10584/5 "2015-11-08T06:44:14Z")

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Could you please open a ticket in order to remove this error log if there is no error or to change this setting in case of redundant gateway.  
It is very disturbing when analysing log for redundancy issue