I'm also having strange issue with backup statement. Here's my config
[code]
upstream test {
server 10.0.0.1;
server 10.0.0.2 backup;
}

upstream proxy {
server 94.1.1.1;
# server 95.1.1.1 backup;
}

server {
listen 80;
server_name _;

access_log off;

location / {
proxy_pass http://proxy;
# proxy_pass http://test;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

client_max_body_size 100m;
client_body_buffer_size 128k;
}
}
[/code]
It shows no errors on nginx -t run but as I uncomment "server 95.1.1.1 backup;" line it outputs
[code]
[emerg]: invalid parameter "backup" in /etc/nginx/sites-enabled/site:8
configuration file /etc/nginx/nginx.conf test failed
[/code]


No errors in "upstream test" section. Why is that? Tried nginx 0.7.67-3 and 0.6.32-3 from debian packages.