# Haproxy 2.0.6 - nbsrv is not working

**URL:** <https://discourse.haproxy.org/t/haproxy-2-0-6-nbsrv-is-not-working/7949>\
**Category:** Help!\
**Created:** [September 9, 2022, 12:45pm UTC](https://discourse.haproxy.org/t/haproxy-2-0-6-nbsrv-is-not-working/7949 "2022-09-09T12:45:31Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![lukastribus](https://avatars.discourse-cdn.com/v4/letter/l/7ea924/32.png) [@lukastribus](https://discourse.haproxy.org/u/lukastribus)\
**Post date:** [September 12, 2022, 8:59pm UTC](https://discourse.haproxy.org/t/haproxy-2-0-6-nbsrv-is-not-working/7949/4 "2022-09-12T20:59:21Z")

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> [@Vels456](#):
>
> All the servers in `main-backend` is down, request is getting failed with 503 since both the servers in main-backend is down
> 
> Could you please help in suggesting the changes in this config to make it work so that I can forward the requests to `backup-backend` ?

I can’t see anything wrong with your configuration on a first glance.

Enable proper logging, reproduce the issue and provide the logs:

> [@How to enable HAProxy Stats Log](https://discourse.haproxy.org/t/how-to-enable-haproxy-stats-log/1738/2):
>
> You can find the details of the logging system in the documentation, section 8 [1]. As an example, here is a basic logging configuration: global log 127.0.0.1 syslog debug defaults log global mode http option httplog [1] [https://cbonte.github.io/haproxy-dconv/1.7/configuration.html#8](https://cbonte.github.io/haproxy-dconv/1.7/configuration.html#8)

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