# GX450 DMNR with router attached

**URL:** <https://forum.sierrawireless.com/t/gx450-dmnr-with-router-attached/21637>\
**Category:** AirLink Routers\
**Created:** [September 28, 2020, 4:42pm UTC](https://forum.sierrawireless.com/t/gx450-dmnr-with-router-attached/21637 "2020-09-28T16:42:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jmooney](https://avatars.discourse-cdn.com/v4/letter/j/90ced4/32.png) [@jmooney](https://forum.sierrawireless.com/u/jmooney)\
**Post date:** [September 28, 2020, 4:42pm UTC](https://forum.sierrawireless.com/t/gx450-dmnr-with-router-attached/21637/1 "2020-09-28T16:42:25Z")

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I am attempting to use a GX450 with DMNR as a backup WAN connection for a Cisco router. Documentation on how to achieve this is lacking. The GX450 is advertising the networks that are behind the router via DMNR but they are unreachable.

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**Author:** ![cherokee](https://avatars.discourse-cdn.com/v4/letter/c/76d3ee/32.png) [@cherokee](https://forum.sierrawireless.com/u/cherokee)\
**Post date:** [October 1, 2020, 3:46am UTC](https://forum.sierrawireless.com/t/gx450-dmnr-with-router-attached/21637/2 "2020-10-01T03:46:57Z")

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Hi jmooney,

Could you please provide your DMNR configuration and your network topology?

Please censor your sensitive information such as IP, authentication key…

Thanks,

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**Author:** ![jmooney](https://avatars.discourse-cdn.com/v4/letter/j/90ced4/32.png) [@jmooney](https://forum.sierrawireless.com/u/jmooney)\
**Post date:** [October 7, 2020, 2:15pm UTC](https://forum.sierrawireless.com/t/gx450-dmnr-with-router-attached/21637/3 "2020-10-07T14:15:15Z")

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I got it figured, thanks. I guess I was overthinking where doco says to change Ethernet IP to your DMNR network. I left it at the default (192.168.13.31), gave router interface an IP in that network and it connected. All good.